Is United States National Institutes of Health down right now?
No one has reported a problem in the last hour.
About United States National Institutes of Health
nih.gov is the official website of United States National Institutes of Health, US government medical research agency. The company was founded in 1887 and based in Bethesda, United States. The domain was registered 29 years ago through get.gov. The Internet Archive first captured it in 1997. It ranks #143 among the most visited sites in the world on the Tranco list. It is hosted in United States on the National Institutes of Health network.
We have recorded no outage for United States National Institutes of Health in the last 90 days; it answered 95.12% of our checks.
Reports, last 24 hours
0 reports · normally about 3 per hour| Problem reported | No reports in the last 24 hours. |
Get notified
One email when nih.gov goes down and one when it recovers. No account needed; unsubscribe from any email.
What we checked
08:52:50 UTC| Layer | Result | Outcome |
|---|---|---|
| DNS name lookup | nih.gov resolves to 156.40.212.210 (AS3527 National Institutes of Health) | pass |
| TLS certificate | Certificate from GoDaddy.com, Inc., expires 2027-02-15 | pass |
| HTTP, Phoenix | HTTP 403 in 0.77 s · Reachable; the site answers automated requests with HTTP 403 3 h ago | pass |
| HTTP, Singapore | HTTP 403 in 2.32 s · Reachable; answered HTTP 403 · via sin1 3 h ago | pass |
| HTTP, Cape Town | HTTP 403 in 2.19 s · Reachable; answered HTTP 403 · via cpt1 3 h ago | pass |
| HTTP, Mumbai | HTTP 403 in 1.69 s · Reachable; answered HTTP 403 · via bom1 3 h ago | pass |
| HTTP, Paris | HTTP 403 in 0.69 s · Reachable; answered HTTP 403 · via cdg1 3 h ago | pass |
| HTTP, San Francisco | HTTP 403 in 0.39 s · Reachable; answered HTTP 403 · via sfo1 3 h ago | pass |
| HTTP, Phoenix | HTTP 301 in 0.38 s · via PHX 3 h ago | pass |
| Content | Page title: “Attention Required! | Cloudflare” · changed in the last 48 h | – |
| Reputation | Trust score 100/100 · trust check | Established |
Outage history, 90 days
No incidents recorded in the last 90 days.
Common questions
Is United States National Institutes of Health down for everyone or just me?
Compare the test from your browser above with our server checks. If our servers reach nih.gov and your browser cannot, the problem is on your connection, DNS or network. If both fail, the site is down.
How do you know if United States National Institutes of Health is down?
We request the homepage from 15 locations, check DNS, the TLS certificate and the HTTP response, and compare the page content with what we saw before. We also read the service's official status feed where one exists and count visitor reports against the usual rate for the hour.
What can I do while it is down?
Subscribe to the alert on this page and we will email you when it recovers. Clearing your DNS cache or switching networks only helps when our servers can reach the site and your browser cannot.