[The Census](https://readinessindex.io/census)

[Q4 2026](https://readinessindex.io/census/2026-Q4)

US Federal Government Sites

# US Federal Government Sites

federal-sites

500 federal executive-branch websites from the .gov registry, ranked by Tranco, with no agency above 10%.

Index 12.0 · scanned 2026-10-11 · up to 32 URLs per site · 500 organizations · 497 scanned (99.4% coverage) · scored as `government`

Median score

28

across 497 sites

Middle half

28–28

spread around the median

Full range

21–66

lowest to highest

Gated

489 of 497

block AI crawlers outright

Middle of 14 cohorts. All cohorts 50 · best cohort 58.

Where this list came from

## The source, and how we filtered it

| Source | [Public .gov domain registry (current-full.csv), ranked by the Tranco list](https://raw.githubusercontent.com/cisagov/dotgov-data/main/current-full.csv), Cybersecurity and Infrastructure Security Agency (CISA); Tranco (2026-10-11) |
| --- | --- |
| License | The registry is a work of the United States federal government, not subject to domestic copyright (17 U.S.C. § 105). The Tranco list is published for research use and is redistributable under the terms on tranco-list.eu; only each domain's rank in it is used here. |
| How we filtered it | The 1,173 domains the registry types 'Federal - Executive'. Those the Tranco list ranks (501 are in its million) are tried in rank order; the rest follow one organization at a time, so an unranked fill reads as a spread across government. Each is fetched with redirects followed and the landing site is the row, so a name that redirects to another is not a second site, and neither is a second registered name for one site. No organization holds more than 50 rows (10%), because the Department of Health and Human Services alone has 63 ranked domains. The first 500 that answer are the cohort; every candidate passed over is recorded with its reason in census/sources/us-federal-sites-skipped.json. Each row says whether it was ranked by Tranco or added from the fill. |
| Built | 2026-10-11 |

The filtering is ours and is disclosed as ours. The source published a list; the decision about which rows of it belong in a cohort was a judgment call, and it is written down so somebody can disagree with it.

Distribution

## Where the 497 sites land

| Grade | Share of the cohort | Sites | Share |
| --- | --- | --- | --- |
| Not ready |   | 487 | 98.0% |
| Weak |   | 9 | 1.8% |
| Adequate |   | 1 | 0.2% |

By dimension

## What the cohort earns, dimension by dimension

The mean share of each dimension’s available points that this cohort earned. Low here means the whole sector is weak on it, not that one site dragged an average down. The per-site spread is in the dataset.

| Dimension | Mean share earned | Mean |
| --- | --- | --- |
| [#1 · Reach](https://readinessindex.io/tests#d-1) These parameters determine the fundamental ease of access that AI has to your site information. |   | 45% |
| [#2 · Read](https://readinessindex.io/tests#d-2) AI generally turns off JavaScript. Does your site information survive without it? |   | 17% |
| [#3 · Understand](https://readinessindex.io/tests#d-3) Does a machine know who and what you are? |   | 19% |
| [#4 · Act](https://readinessindex.io/tests#d-4) Sitemaps, redirects, 404s, licensing terms, and not wasting the crawl budget. |   | 89% |

How much of each site we read

The cap is 32 URLs and it is a ceiling, not a promise. A portal whose every link points at a different host yields one page; a university yields the full sample. The median here is **1**, the range 1–32, published so that "we sampled 32 URLs per site" cannot become a claim the data does not support.

Where this cohort fails

## 20 tests almost nobody in this cohort passes

Universal — nobody passes these

20 checks · 5 of them worth 2 points or more

| Test | What it asks | Failing | Of | Points |
| --- | --- | --- | --- | --- |
| [EXT-1](https://readinessindex.io/tests#row-EXT-1) | Do you publish an llms.txt file for coding assistants? | 100.0% | 497 | 0 |
| [EXT-11](https://readinessindex.io/tests#row-EXT-11) | Have you marked the part of a page that answers a spoken question? | 100.0% | 497 | 0 |
| [EXT-12](https://readinessindex.io/tests#row-EXT-12) | Do you tell search engines the moment a page changes? | 100.0% | 497 | 0 |
| [EXT-13](https://readinessindex.io/tests#row-EXT-13) | Can an assistant ask your site a question directly? | 100.0% | 497 | 0 |
| [EXT-14](https://readinessindex.io/tests#row-EXT-14) | Does your site offer its actions to AI browsers as tools? | 100.0% | 472 | 0 |
| [EXT-16](https://readinessindex.io/tests#row-EXT-16) | Do you publish a card or a skills list for the agents you run? | 100.0% | 497 | 0 |
| [EXT-17](https://readinessindex.io/tests#row-EXT-17) | Do you list your agents in your domain's DNS records? | 100.0% | 344 | 0 |
| [EXT-2](https://readinessindex.io/tests#row-EXT-2) | Do you list your APIs and agent tools where agents look for them? | 100.0% | 3 | 0 |
| [EXT-4](https://readinessindex.io/tests#row-EXT-4) | Can an AI assistant connect to your site as a tool? | 100.0% | 497 | 0 |
| [MSR-7](https://readinessindex.io/tests#row-MSR-7) | Are you set up in Google Search Console and Bing Webmaster Tools, and do you read their AI reports? | 100.0% | 497 | 0 |
| [PST-2](https://readinessindex.io/tests#row-PST-2) | Have you posted a Content Signals statement about what AI may do with your content? | 100.0% | 497 | 0 |
| [PST-4](https://readinessindex.io/tests#row-PST-4) | Have you reserved your text and data mining rights in a form machines can read? | 100.0% | 497 | 0 |
| [RED-10](https://readinessindex.io/tests#row-RED-10) | Do you offer a plain-text (Markdown) copy of your pages? | 100.0% | 47 | 2 |
| [RED-12](https://readinessindex.io/tests#row-RED-12) | If a machine asks for Markdown, does your site give it? | 100.0% | 497 | 2 |
| [RED-14](https://readinessindex.io/tests#row-RED-14) | Do your headings follow in order, starting from one main heading? | 100.0% | 497 | 1 |
| [RED-5](https://readinessindex.io/tests#row-RED-5) | Do your PDFs and images have their own rules for search and quoting? | 100.0% | 4 | 1 |
| [UND-1](https://readinessindex.io/tests#row-UND-1) | Does your site say clearly who you are? | 100.0% | 497 | 2 |
| [UND-10](https://readinessindex.io/tests#row-UND-10) | Does your page code link to your official profiles elsewhere? | 100.0% | 497 | 2 |
| [UND-2](https://readinessindex.io/tests#row-UND-2) | Does your site use the page labels that search engines still read for what you publish? | 100.0% | 457 | 3 |
| [UND-5](https://readinessindex.io/tests#row-UND-5) | Does the author label in your page code point to that person? | 100.0% | 4 | 1 |

Near-universal — 95% and above

9 checks · 5 of them worth 2 points or more

| Test | What it asks | Failing | Of | Points |
| --- | --- | --- | --- | --- |
| [EXT-5](https://readinessindex.io/tests#row-EXT-5) | Is your page code one connected description of your organization? | 99.8% | 497 | 0 |
| [RCH-3](https://readinessindex.io/tests#row-RCH-3) | Does each page say which web address is the real one? | 99.8% | 497 | 2 |
| [RED-13](https://readinessindex.io/tests#row-RED-13) | Is the page built from real page parts, like header, main and navigation? | 99.8% | 497 | 1 |
| [UND-6](https://readinessindex.io/tests#row-UND-6) | Are your published and updated dates honest and visible? | 99.8% | 497 | 6 |
| [RED-1](https://readinessindex.io/tests#row-RED-1) | Is your page's text in the page itself, without needing JavaScript? | 99.6% | 447 | 10 |
| [RED-3](https://readinessindex.io/tests#row-RED-3) | Can a crawler trust the 'last changed' dates in your sitemap? | 99.4% | 497 | 2 |
| [RED-8](https://readinessindex.io/tests#row-RED-8) | Do you have sitemaps for your images and videos? | 99.0% | 497 | 1 |
| [EXT-19](https://readinessindex.io/tests#row-EXT-19) | Does robots.txt say where your sitemap is? | 98.8% | 497 | 0 |
| [RCH-2](https://readinessindex.io/tests#row-RCH-2) | Does your website let those crawlers in, or does your security turn them away? | 98.4% | 497 | 12 |

Coral bars mark tests worth 2 points or more, the failures that actually move a score.

Every site

## Every 500, named, with a report for each

Whether or not it has been scanned. Rows with no website on record, sites that were unreachable and sites that turned us away stay in the table with the reason on them, and none of them enters an average: dropping them would shrink the population to the part that was easy to measure. A few points between two neighbors is noise. The box filters every row in the cohort, not only the page you are on; click a header to sort the rows on this page by name or by score.

Showing 1–100 of 500 · page 1 of 5

| Site | Score | Gated | Pages read | Report |
| --- | --- | --- | --- | --- |
| [National Institutes of Health, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/nih.gov) [nih.gov](https://www.nih.gov/)ranked 139 by the Tranco list; registered as nih.gov to Department of Health and Human Services; the edge returned 403 to AIRBot | 29 | Gated | 1 |   |
| [National Institute of Standards and Technology, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/nist.gov) [nist.gov](https://www.nist.gov/)ranked 235 by the Tranco list; registered as nist.gov to Department of Commerce | 28 | Gated | 1 |   |
| [Centers for Disease Control and Prevention, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/cdc.gov) [cdc.gov](https://www.cdc.gov/index.html)ranked 359 by the Tranco list; registered as cdc.gov to Department of Health and Human Services; the site redirects here from its root; this is where a visitor arriving cold actually lands | 27 | Gated | 1 |   |
| [NASA Office of the Chief Information Officer, National Aeronautics and Space Administration](https://readinessindex.io/census/2026-Q4/federal-sites/nasa.gov) [nasa.gov](https://www.nasa.gov/)ranked 360 by the Tranco list; registered as nasa.gov to National Aeronautics and Space Administration | 28 | Gated | 1 |   |
| [National Oceanic and Atmospheric Administration, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/noaa.gov) [noaa.gov](https://www.noaa.gov/)ranked 514 by the Tranco list; registered as noaa.gov to Department of Commerce; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Food and Drug Administration, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/fda.gov) [fda.gov](https://www.fda.gov/apology_objects/abuse-detection-apology.html)ranked 752 by the Tranco list; registered as fda.gov to Department of Health and Human Services; returns 404 at the root | 25 | Gated | 1 |   |
| [Department of Agriculture](https://readinessindex.io/census/2026-Q4/federal-sites/usda.gov) [usda.gov](https://www.usda.gov/)ranked 850 by the Tranco list; registered as usda.gov to Department of Agriculture; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Environmental Protection Agency](https://readinessindex.io/census/2026-Q4/federal-sites/epa.gov) [epa.gov](https://www.epa.gov/)ranked 930 by the Tranco list; registered as epa.gov to Environmental Protection Agency | 35 | Gated | 1 |   |
| [Bureau of Global Public Affairs, Department of State](https://readinessindex.io/census/2026-Q4/federal-sites/state.gov) [state.gov](https://www.state.gov/)ranked 948 by the Tranco list; registered as state.gov to Department of State; the edge returned 403 to AIRBot | 33 | Gated | 1 |   |
| [White House Office, Executive Office of the President](https://readinessindex.io/census/2026-Q4/federal-sites/whitehouse.gov) [whitehouse.gov](https://www.whitehouse.gov/)ranked 1,045 by the Tranco list; registered as whitehouse.gov to Executive Office of the President | 57 | No | 1 |   |
| [Internal Revenue Service, Department of the Treasury](https://readinessindex.io/census/2026-Q4/federal-sites/irs.gov) [irs.gov](https://www.irs.gov/)ranked 1,345 by the Tranco list; registered as irs.gov to Department of the Treasury | 29 | Gated | 1 |   |
| [Federal Trade Commission](https://readinessindex.io/census/2026-Q4/federal-sites/ftc.gov) [ftc.gov](https://www.ftc.gov/)ranked 1,549 by the Tranco list; registered as ftc.gov to Federal Trade Commission | 29 | Gated | 1 |   |
| [National Park Service, Department of the Interior](https://readinessindex.io/census/2026-Q4/federal-sites/nps.gov) [nps.gov](https://www.nps.gov/index.htm)ranked 1,964 by the Tranco list; registered as nps.gov to Department of the Interior; the site redirects here from its root; this is where a visitor arriving cold actually lands | 27 | Gated | 1 |   |
| [Office of Information and Technology, IT Operations and Services (ITOPS), Department of Veterans Affairs](https://readinessindex.io/census/2026-Q4/federal-sites/va.gov) [va.gov](https://www.va.gov/)ranked 1,967 by the Tranco list; registered as va.gov to Department of Veterans Affairs | 28 | Gated | 1 |   |
| [Securities and Exchange Commission](https://readinessindex.io/census/2026-Q4/federal-sites/sec.gov) [sec.gov](https://www.sec.gov/)ranked 2,054 by the Tranco list; registered as sec.gov to Securities and Exchange Commission | 29 | Gated | 1 |   |
| [Office of the Chief Information Officer, Department of Education](https://readinessindex.io/census/2026-Q4/federal-sites/ed.gov) [ed.gov](https://www.ed.gov/)ranked 2,099 by the Tranco list; registered as ed.gov to Department of Education; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Bureau of Labor Statistics, Department of Labor](https://readinessindex.io/census/2026-Q4/federal-sites/bls.gov) [bls.gov](https://www.bls.gov)ranked 2,111 by the Tranco list; registered as bls.gov to Department of Labor | 28 | Gated | 1 |   |
| [Office of the Secretary of Health and Human Services, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/hhs.gov) [hhs.gov](https://www.hhs.gov/)ranked 2,169 by the Tranco list; registered as hhs.gov to Department of Health and Human Services; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Bureau of the Census, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/census.gov) [census.gov](https://www.census.gov/)ranked 2,243 by the Tranco list; registered as census.gov to Department of Commerce | 47 | Gated | 32 |   |
| [Department of Justice](https://readinessindex.io/census/2026-Q4/federal-sites/justice.gov) [justice.gov](https://www.justice.gov/)ranked 2,264 by the Tranco list; registered as justice.gov to Department of Justice | 29 | Gated | 1 |   |
| [National Oceanic and Atmospheric Administration, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/weather.gov) [weather.gov](https://www.weather.gov/)ranked 2,301 by the Tranco list; registered as weather.gov to Department of Commerce | 28 | Gated | 1 |   |
| [Social Security Administration](https://readinessindex.io/census/2026-Q4/federal-sites/ssa.gov) [ssa.gov](https://www.ssa.gov/)ranked 2,527 by the Tranco list; registered as ssa.gov to Social Security Administration; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Management Directorate, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/dhs.gov) [dhs.gov](https://www.dhs.gov/)ranked 2,625 by the Tranco list; registered as dhs.gov to Department of Homeland Security | 29 | Gated | 1 |   |
| [National Archives and Records Administration](https://readinessindex.io/census/2026-Q4/federal-sites/archives.gov) [archives.gov](https://www.archives.gov/)ranked 2,712 by the Tranco list; registered as archives.gov to National Archives and Records Administration | 28 | Gated | 1 |   |
| [National Library of Medicine, NIH, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/medlineplus.gov) [medlineplus.gov](https://medlineplus.gov/)ranked 2,738 by the Tranco list; registered as medlineplus.gov to Department of Health and Human Services | 28 | Gated | 1 |   |
| [Federal Aviation Administration, Department of Transportation](https://readinessindex.io/census/2026-Q4/federal-sites/faa.gov) [faa.gov](http://www.faa.gov/)ranked 2,750 by the Tranco list; registered as faa.gov to Department of Transportation; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Department of the Treasury - OCIO, Department of the Treasury](https://readinessindex.io/census/2026-Q4/federal-sites/home.treasury.gov) [home.treasury.gov](https://home.treasury.gov/)ranked 2,838 by the Tranco list; registered as treasury.gov, which lands on home.treasury.gov to Department of the Treasury | 28 | Gated | 1 |   |
| [Department of Transportation](https://readinessindex.io/census/2026-Q4/federal-sites/dot.gov) [dot.gov](https://www.dot.gov)ranked 2,846 by the Tranco list; registered as dot.gov to Department of Transportation; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Federal Communications Commission](https://readinessindex.io/census/2026-Q4/federal-sites/fcc.gov) [fcc.gov](https://fcc.gov/)ranked 2,906 by the Tranco list; registered as fcc.gov to Federal Communications Commission; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [International Trade Administration, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/privacyshield.gov) [privacyshield.gov](https://privacyshield.gov/)ranked 2,915 by the Tranco list; registered as privacyshield.gov to Department of Commerce; returns 404 at the root | 33 | Gated | 1 |   |
| [Federal Acquisition Service, General Services Administration](https://readinessindex.io/census/2026-Q4/federal-sites/usa.gov) [usa.gov](https://www.usa.gov/)ranked 2,933 by the Tranco list; registered as usa.gov to General Services Administration | 28 | Gated | 1 |   |
| [U.S. Patent and Trademark Office, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/uspto.gov) [uspto.gov](https://www.uspto.gov/)ranked 3,078 by the Tranco list; registered as uspto.gov to Department of Commerce | 29 | Gated | 1 |   |
| [National Cancer Institute, NIH, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/cancer.gov) [cancer.gov](https://www.cancer.gov/)ranked 3,093 by the Tranco list; registered as cancer.gov to Department of Health and Human Services | 29 | Gated | 1 |   |
| [Federal Bureau of Investigation, Department of Justice](https://readinessindex.io/census/2026-Q4/federal-sites/fbi.gov) [fbi.gov](https://fbi.gov/)ranked 3,118 by the Tranco list; registered as fbi.gov to Department of Justice; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Department of Labor](https://readinessindex.io/census/2026-Q4/federal-sites/dol.gov) [dol.gov](https://www.dol.gov/)ranked 3,177 by the Tranco list; registered as dol.gov to Department of Labor | 28 | Gated | 1 |   |
| [Bureau of Global Public Affairs, Department of State](https://readinessindex.io/census/2026-Q4/federal-sites/usembassy.gov) [usembassy.gov](https://usembassy.gov/)ranked 3,303 by the Tranco list; registered as usembassy.gov to Department of State; the edge returned 403 to AIRBot | 33 | Gated | 1 |   |
| [International Trade Administration, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/dataprivacyframework.gov) [dataprivacyframework.gov](https://dataprivacyframework.gov/)ranked 3,346 by the Tranco list; registered as dataprivacyframework.gov to Department of Commerce | 28 | Gated | 1 |   |
| [Cybersecurity and Infrastructure Security Agency, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/cisa.gov) [cisa.gov](https://www.cisa.gov/)ranked 3,547 by the Tranco list; registered as cisa.gov to Department of Homeland Security | 29 | Gated | 1 |   |
| [Department of Labor](https://readinessindex.io/census/2026-Q4/federal-sites/osha.gov) [osha.gov](https://osha.gov/)ranked 3,558 by the Tranco list; registered as osha.gov to Department of Labor; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Small Business Administration](https://readinessindex.io/census/2026-Q4/federal-sites/sba.gov) [sba.gov](https://www.sba.gov/)ranked 3,652 by the Tranco list; registered as sba.gov to Small Business Administration | 28 | Gated | 1 |   |
| [National Library of Medicine, NIH, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/clinicaltrials.gov) [clinicaltrials.gov](https://clinicaltrials.gov/)ranked 3,676 by the Tranco list; registered as clinicaltrials.gov to Department of Health and Human Services | 50 | No | 32 |   |
| [Central Intelligence Agency](https://readinessindex.io/census/2026-Q4/federal-sites/cia.gov) [cia.gov](https://www.cia.gov/)ranked 3,839 by the Tranco list; registered as cia.gov to Central Intelligence Agency | 28 | Gated | 1 |   |
| [Federal Reserve Bank, Board of Governors of the Federal Reserve](https://readinessindex.io/census/2026-Q4/federal-sites/federalreserve.gov) [federalreserve.gov](https://www.federalreserve.gov/)ranked 3,849 by the Tranco list; registered as federalreserve.gov to Board of Governors of the Federal Reserve | 42 | Gated | 32 |   |
| [Citizenship and Immigration Services, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/uscis.gov) [uscis.gov](https://www.uscis.gov/)ranked 3,920 by the Tranco list; registered as uscis.gov to Department of Homeland Security | 28 | Gated | 1 |   |
| [Federal Emergency Management Agency, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/fema.gov) [fema.gov](https://www.fema.gov/)ranked 3,951 by the Tranco list; registered as fema.gov to Department of Homeland Security | 28 | Gated | 1 |   |
| [Energy Information Administration, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/eia.gov) [eia.gov](https://www.eia.gov/)ranked 4,087 by the Tranco list; registered as eia.gov to Department of Energy | 28 | Gated | 1 |   |
| [Centers for Medicare and Medicaid Services, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/cms.gov) [cms.gov](https://www.cms.gov/)ranked 4,261 by the Tranco list; registered as cms.gov to Department of Health and Human Services | 29 | Gated | 1 |   |
| [Defense Media Activity, Department of Defense](https://readinessindex.io/census/2026-Q4/federal-sites/defense.gov) [defense.gov](https://defense.gov/)ranked 4,427 by the Tranco list; registered as defense.gov to Department of Defense; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [National Science Foundation](https://readinessindex.io/census/2026-Q4/federal-sites/nsf.gov) [nsf.gov](https://www.nsf.gov/)ranked 4,602 by the Tranco list; registered as nsf.gov to National Science Foundation | 29 | Gated | 1 |   |
| [National Highway Traffic Safety Administration, Department of Transportation](https://readinessindex.io/census/2026-Q4/federal-sites/nhtsa.gov) [nhtsa.gov](https://www.nhtsa.gov/)ranked 4,986 by the Tranco list; registered as nhtsa.gov to Department of Transportation; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [U.S. Customs and Border Protection, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/cbp.gov) [cbp.gov](https://www.cbp.gov/)ranked 5,020 by the Tranco list; registered as cbp.gov to Department of Homeland Security | 29 | Gated | 1 |   |
| [Lawrence Berkeley National Laboratory, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/lbl.gov) [lbl.gov](https://www.lbl.gov/)ranked 5,384 by the Tranco list; registered as lbl.gov to Department of Energy | 28 | Gated | 1 |   |
| [Substance Abuse and Mental Health Services Administration, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/samhsa.gov) [samhsa.gov](https://www.samhsa.gov/)ranked 5,893 by the Tranco list; registered as samhsa.gov to Department of Health and Human Services | 34 | Gated | 1 |   |
| [Office of GSA IT, General Services Administration](https://readinessindex.io/census/2026-Q4/federal-sites/gsa.gov) [gsa.gov](https://www.gsa.gov/)ranked 6,172 by the Tranco list; registered as gsa.gov to General Services Administration | 29 | Gated | 1 |   |
| [Department of Housing and Urban Development](https://readinessindex.io/census/2026-Q4/federal-sites/hud.gov) [hud.gov](https://www.hud.gov/)ranked 6,301 by the Tranco list; registered as hud.gov to Department of Housing and Urban Development | 29 | Gated | 1 |   |
| [Consumer Financial Protection Bureau](https://readinessindex.io/census/2026-Q4/federal-sites/consumerfinance.gov) [consumerfinance.gov](https://www.consumerfinance.gov/)ranked 6,457 by the Tranco list; registered as consumerfinance.gov to Consumer Financial Protection Bureau | 28 | Gated | 1 |   |
| [United States Fish and Wildlife Service, Department of the Interior](https://readinessindex.io/census/2026-Q4/federal-sites/fws.gov) [fws.gov](https://www.fws.gov/)ranked 6,535 by the Tranco list; registered as fws.gov to Department of the Interior | 28 | Gated | 1 |   |
| [Federal Acquisition Service, General Services Administration](https://readinessindex.io/census/2026-Q4/federal-sites/login.gov) [login.gov](https://login.gov/)ranked 6,556 by the Tranco list; registered as login.gov to General Services Administration | 28 | Gated | 1 |   |
| [Consumer Product Safety Commission](https://readinessindex.io/census/2026-Q4/federal-sites/cpsc.gov) [cpsc.gov](https://www.cpsc.gov/)ranked 7,298 by the Tranco list; registered as cpsc.gov to Consumer Product Safety Commission | 29 | Gated | 1 |   |
| [Centers for Medicare and Medicaid Services, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/medicare.gov) [medicare.gov](https://www.medicare.gov/)ranked 7,305 by the Tranco list; registered as medicare.gov to Department of Health and Human Services | 29 | Gated | 1 |   |
| [Environmental Protection Agency](https://readinessindex.io/census/2026-Q4/federal-sites/energystar.gov) [energystar.gov](https://www.energystar.gov/)ranked 8,062 by the Tranco list; registered as energystar.gov to Environmental Protection Agency | 50 | No | 1 |   |
| [Transportation Security Administration, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/tsa.gov) [tsa.gov](https://www.tsa.gov/)ranked 8,114 by the Tranco list; registered as tsa.gov to Department of Homeland Security | 29 | Gated | 1 |   |
| [Department of State](https://readinessindex.io/census/2026-Q4/federal-sites/usaid.gov) [usaid.gov](https://usaid.gov/)ranked 8,596 by the Tranco list; registered as usaid.gov to Department of State | 28 | Gated | 1 |   |
| [Equal Employment Opportunity Commission](https://readinessindex.io/census/2026-Q4/federal-sites/eeoc.gov) [eeoc.gov](https://www.eeoc.gov/)ranked 10,775 by the Tranco list; registered as eeoc.gov to Equal Employment Opportunity Commission | 29 | Gated | 1 |   |
| [Department of Defense](https://readinessindex.io/census/2026-Q4/federal-sites/war.gov) [war.gov](https://war.gov/)ranked 10,807 by the Tranco list; registered as war.gov to Department of Defense; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Internet Crime Complaint Center, Department of Justice](https://readinessindex.io/census/2026-Q4/federal-sites/ic3.gov) [ic3.gov](https://www.ic3.gov/)ranked 11,002 by the Tranco list; registered as ic3.gov to Department of Justice | 28 | Gated | 1 |   |
| [Centers for Medicare and Medicaid Services, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/healthcare.gov) [healthcare.gov](https://www.healthcare.gov/)ranked 11,068 by the Tranco list; registered as healthcare.gov to Department of Health and Human Services | 37 | Gated | 32 |   |
| [Federal Deposit Insurance Corporation](https://readinessindex.io/census/2026-Q4/federal-sites/fdic.gov) [fdic.gov](https://www.fdic.gov/)ranked 11,226 by the Tranco list; registered as fdic.gov to Federal Deposit Insurance Corporation | 29 | Gated | 1 |   |
| [Oak Ridge National Laboratory, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/ornl.gov) [ornl.gov](https://www.ornl.gov/)ranked 11,518 by the Tranco list; registered as ornl.gov to Department of Energy | 28 | Gated | 1 |   |
| U.S. Department of Transportation, Department of Transportation [transportation.gov](https://www.transportation.gov)blockedranked 11,543 by the Tranco list; registered as transportation.gov to Department of Transportation; the edge returned 403 to AIRBot; not measured: HTTP 403 (Akamai) | — | No | — |   |
| [Office of Justice Programs, Department of Justice](https://readinessindex.io/census/2026-Q4/federal-sites/ojp.gov) [ojp.gov](https://ojp.gov/)ranked 11,600 by the Tranco list; registered as ojp.gov to Department of Justice | 29 | Gated | 1 |   |
| [Office of Personnel Management](https://readinessindex.io/census/2026-Q4/federal-sites/usajobs.gov) [usajobs.gov](https://www.usajobs.gov/)ranked 11,683 by the Tranco list; registered as usajobs.gov to Office of Personnel Management | 28 | Gated | 1 |   |
| [Office of Disease Prevention and Health Promotion, Office of the Secretary, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/health.gov) [health.gov](https://health.gov/)ranked 11,697 by the Tranco list; registered as health.gov to Department of Health and Human Services | 29 | Gated | 1 |   |
| [Lawrence Livermore National Laboratory, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/llnl.gov) [llnl.gov](https://www.llnl.gov/)ranked 11,817 by the Tranco list; registered as llnl.gov to Department of Energy | 29 | Gated | 1 |   |
| [Management Directorate, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/ready.gov) [ready.gov](https://www.ready.gov/)ranked 12,044 by the Tranco list; registered as ready.gov to Department of Homeland Security | 29 | Gated | 1 |   |
| [Civil Rights Division, Department of Justice](https://readinessindex.io/census/2026-Q4/federal-sites/ada.gov) [ada.gov](https://www.ada.gov/)ranked 12,254 by the Tranco list; registered as ada.gov to Department of Justice | 28 | Gated | 1 |   |
| [International Trade Administration, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/trade.gov) [trade.gov](https://www.trade.gov/)ranked 12,309 by the Tranco list; registered as trade.gov to Department of Commerce | 29 | Gated | 1 |   |
| [U.S. Immigration and Customs Enforcement, Department of Homeland Security](https://readinessindex.io/census/2026-Q4/federal-sites/ice.gov) [ice.gov](https://www.ice.gov/)ranked 12,534 by the Tranco list; registered as ice.gov to Department of Homeland Security | 29 | Gated | 1 |   |
| [Health Resources and Services Administration, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/hrsa.gov) [hrsa.gov](https://www.hrsa.gov/)ranked 13,040 by the Tranco list; registered as hrsa.gov to Department of Health and Human Services; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [National Oceanic and Atmospheric Administration, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/aviationweather.gov) [aviationweather.gov](https://aviationweather.gov/)ranked 13,075 by the Tranco list; registered as aviationweather.gov to Department of Commerce | 28 | Gated | 1 |   |
| [Los Alamos National Laboratory, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/lanl.gov) [lanl.gov](https://www.lanl.gov/)ranked 13,126 by the Tranco list; registered as lanl.gov to Department of Energy | 28 | Gated | 1 |   |
| [Agency for Healthcare Research and Quality, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/ahrq.gov) [ahrq.gov](https://www.ahrq.gov/)ranked 13,253 by the Tranco list; registered as ahrq.gov to Department of Health and Human Services | 35 | Gated | 1 |   |
| [Office of GSA IT, General Services Administration](https://readinessindex.io/census/2026-Q4/federal-sites/regulations.gov) [regulations.gov](https://www.regulations.gov/)ranked 13,331 by the Tranco list; registered as regulations.gov to General Services Administration; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Office of the United States Trade Representative, Executive Office of the President](https://readinessindex.io/census/2026-Q4/federal-sites/ustr.gov) [ustr.gov](https://ustr.gov/)ranked 13,486 by the Tranco list; registered as ustr.gov to Executive Office of the President | 29 | Gated | 1 |   |
| Department of Commerce [commerce.gov](https://www.commerce.gov/)blockedranked 13,797 by the Tranco list; registered as doc.gov, which lands on commerce.gov to Department of Commerce; the edge returned 403 to AIRBot; not measured: HTTP 403 (Cloudflare) | — | No | — |   |
| [Office of Scientific and Technical Information, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/osti.gov) [osti.gov](https://www.osti.gov/)ranked 14,117 by the Tranco list; registered as osti.gov to Department of Energy | 35 | Gated | 1 |   |
| [Federal Acquisition Service, General Services Administration](https://readinessindex.io/census/2026-Q4/federal-sites/sam.gov) [sam.gov](https://sam.gov/)ranked 14,190 by the Tranco list; registered as sam.gov to General Services Administration | 29 | Gated | 1 |   |
| [Bureau of Land Management, Department of the Interior](https://readinessindex.io/census/2026-Q4/federal-sites/blm.gov) [blm.gov](https://www.blm.gov/)ranked 14,294 by the Tranco list; registered as blm.gov to Department of the Interior | 35 | Gated | 1 |   |
| [Office of Personnel Management](https://readinessindex.io/census/2026-Q4/federal-sites/opm.gov) [opm.gov](https://www.opm.gov/)ranked 14,484 by the Tranco list; registered as opm.gov to Office of Personnel Management | 28 | Gated | 1 |   |
| [Bureau of Economic Analysis, Department of Commerce](https://readinessindex.io/census/2026-Q4/federal-sites/bea.gov) [bea.gov](https://bea.gov/)ranked 14,493 by the Tranco list; registered as bea.gov to Department of Commerce | 29 | Gated | 1 |   |
| [Department of the Interior](https://readinessindex.io/census/2026-Q4/federal-sites/doi.gov) [doi.gov](https://www.doi.gov/)ranked 14,733 by the Tranco list; registered as doi.gov to Department of the Interior | 29 | Gated | 1 |   |
| [National Security Agency, Department of Defense](https://readinessindex.io/census/2026-Q4/federal-sites/nsa.gov) [nsa.gov](https://nsa.gov/)ranked 14,790 by the Tranco list; registered as nsa.gov to Department of Defense; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Drug Enforcement Administration, Department of Justice](https://readinessindex.io/census/2026-Q4/federal-sites/dea.gov) [dea.gov](https://dea.gov/)ranked 15,147 by the Tranco list; registered as dea.gov to Department of Justice; the edge returned 403 to AIRBot | 28 | Gated | 1 |   |
| [Forest Service, Department of Agriculture](https://readinessindex.io/census/2026-Q4/federal-sites/recreation.gov) [recreation.gov](https://www.recreation.gov/)ranked 15,352 by the Tranco list; registered as recreation.gov to Department of Agriculture | 28 | Gated | 1 |   |
| [National Institutes of Health, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/genome.gov) [genome.gov](https://www.genome.gov/)ranked 15,812 by the Tranco list; registered as genome.gov to Department of Health and Human Services | 29 | Gated | 1 |   |
| [Sandia National Laboratories, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/sandia.gov) [sandia.gov](https://www.sandia.gov/)ranked 16,034 by the Tranco list; registered as sandia.gov to Department of Energy | 28 | Gated | 1 |   |
| [Brookhaven National Laboratory, Department of Energy](https://readinessindex.io/census/2026-Q4/federal-sites/bnl.gov) [bnl.gov](https://www.bnl.gov/world/)ranked 16,208 by the Tranco list; registered as bnl.gov to Department of Energy; the site redirects here from its root; this is where a visitor arriving cold actually lands | 27 | Gated | 1 |   |
| [National Institute on Drug Abuse, NIH, Department of Health and Human Services](https://readinessindex.io/census/2026-Q4/federal-sites/nida.nih.gov) [nida.nih.gov](https://nida.nih.gov/)ranked 16,370 by the Tranco list; registered as drugabuse.gov, which lands on nida.nih.gov to Department of Health and Human Services | 28 | Gated | 1 |   |
| [Financial Crimes Enforcement Network, Department of the Treasury](https://readinessindex.io/census/2026-Q4/federal-sites/fincen.gov) [fincen.gov](https://www.fincen.gov/)ranked 16,472 by the Tranco list; registered as fincen.gov to Department of the Treasury | 28 | Gated | 1 |   |
| [Federal Acquisition Service, General Services Administration](https://readinessindex.io/census/2026-Q4/federal-sites/cloud.gov) [cloud.gov](https://cloud.gov/)ranked 16,544 by the Tranco list; registered as cloud.gov to General Services Administration | 28 | Gated | 1 |   |

Scores are for the population, not for ranking two named sites against each other. A few points between neighbors is noise. See [what these numbers can and cannot support](https://readinessindex.io/census/methodology). Data: [sites.csv](https://readinessindex.io/census/2026-Q4/data/sites.csv) · [checks.csv](https://readinessindex.io/census/2026-Q4/data/checks.csv) · [summary.json](https://readinessindex.io/census/2026-Q4/data/summary.json)