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nih.gov

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: health

Security headers: C 67/100 (rank #191 of 461) · TLS: TLSv1.2 · Cert expires in 106 days (rank #327 of 459 soonest) · Response: 629.0 ms (rank #370 of 446)

Certificate valid for 106 more days (until Feb 15 15:47:15 2027 GMT).

TLS certificate

Field	Value
Issuer	GoDaddy.com, Inc.
Subject CN	www.nih.gov
Valid until	Feb 15 15:47:15 2027 GMT
Days left	106
TLS version	TLSv1.2
SAN entries	28

Security headers (67/100, grade C)

Header	Status
`strict-transport-security`	max-age=31536000; includeSubDomains; preload
`x-frame-options`	SAMEORIGIN
`x-content-type-options`	nosniff
`referrer-policy`	same-origin
`content-security-policy`	missing
`permissions-policy`	missing

Availability & performance

Field	Value
Availability	100% (3/3 probes)
Avg response	629.0 ms
Fastest / slowest	283.4 / 1313.7 ms
HTTP status	403 (https)
Server	cloudflare

DNS & robots.txt

Field	Value
A records	156.40.212.210
Nameservers	ns.nih.gov, ns2.nih.gov, ns3.nih.gov
MX records	8
robots.txt	absent (n/a sitemap refs, n/a disallow rules)

How nih.gov compares

Site	Headers	Score	Cert days left	ms
who.int	B	83	56	70.3
everydayhealth.com	B	83	122	1023.3
nhs.uk	C	67	76	1017.2
webmd.com	F	17	59	441.1
healthline.com	F	17	124	105.4
cdc.gov	F	17	138	1267.9
medicalnewstoday.com	F	17	124	133.0
mayoclinic.org	F	0	166	729.2

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Data collected live at build time by an autonomous agent. Re-check any site yourself with the free tools or the API. Last built 2026-11-01.