github.nih.gov - dns.ninja

`github.nih.gov`

DNSSEC	⚠️ Not signed
A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
		PTR	`cdn-185-199-108-153.github.com`
A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}
NS	`nihblox6.nih.gov` ⭐
NS	`ns.nih.gov` ⚠️ Not in parent delegation
		A	2607:f220:404:101::80e7:80fb^{🇺🇸 AS3527-NIH2607:f220:400::/43 National Library of Medicine}
		A	128.231.128.251^{🇺🇸 AS3527-NIH128.231.0.0/16 9000 Rockville Pike MSC 4805 Bethesda MD 20892-4805 United States}
NS	`ns2.nih.gov` ⚠️ Not in parent delegation
		A	128.231.64.1^{🇺🇸 AS3527-NIH128.231.0.0/16 9000 Rockville Pike MSC 4805 Bethesda MD 20892-4805 United States}
			PTR	`ns2.nih.gov`
NS	`ns3.nih.gov` ⚠️ Not in parent delegation
MX	`cloud.nih.gov` ⭐
		A	185.199.108.153^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
			PTR	`cdn-185-199-108-153.github.com`
		A	185.199.109.153^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
			PTR	`cdn-185-199-109-153.github.com`
		A	185.199.110.153^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
			PTR	`cdn-185-199-110-153.github.com`
		A	185.199.111.153^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}
			PTR	`cdn-185-199-111-153.github.com`
SOA	`nihblox6.nih.gov`hostmaster@nih.gov serial=5097

`nih.gov`

	DNSSEC	🔒 Signed (DS record present)
	A	156.40.212.210^{🇺🇸 AS3527-NIH156.40.0.0/16 Proxy-registered route object for NIH}
	NS	`nihblox6.nih.gov` ⭐
	NS	`ns.nih.gov`
	NS	`ns2.nih.gov`
	NS	`ns3.nih.gov`
	MX	`nihcesxway3.hub.nih.gov` ⭐
	MX	`nihcesxway4.hub.nih.gov` ⭐
	MX	`nihcesxway5.hub.nih.gov` ⭐
	MX	`nihcesxway6.hub.nih.gov` ⭐
	MX	`nihcesxwayst03.hub.nih.gov` ⭐
	MX	`nihcesxwayst04.hub.nih.gov` ⭐
	MX	`nihcesxwayst05.hub.nih.gov` ⭐
	MX	`nihcesxwayst06.hub.nih.gov` ⭐
	TXT	`identrust_validate=gQ54(0x356558)spYKimJ6IrOqCZrD5ckAPWT8GjcAlRitOVlEB`
	TXT	`sv6eiguevqe64cojov3psnedd2`
	TXT	`pbj2k0thl8k6bc1b5igtqqghls`
	TXT	`graphpad.com:domain-verification=gN34VRAg6P9tjzcJQp3UzA`
	TXT	`_acquiaplatform.nih.gov:YlLYOocbRZcMeei5s0g/6cFJWMNb3AljE+bns/TE/e4=`
	TXT	`YlLYOocbRZcMeei5s0g/6cFJWMNb3AljE+bns/TE/e4=`
	TXT	`mongodb-site-verification=gnP2xDWxNwIi8HvCaZxCA9DYeIIsM908`
	TXT	`_0i392yrtc0z5vy7dpsmgeoukvw7bysw`
	TXT	`_ai4lciv17rnka4jdu9z7ft5dkdn6cwi`
	TXT	`_jiomcldogudftjarbrdx4kt57mzu5xv`
	TXT	`v=spf1 ip4:128.231.90.64/26 ip4:165.112.13.0/26 ip4:156.40.79.128/25 ip4:128....`
	TXT	`webexdomainverification.4C675B8AF44FB136E053AB06FC0A3F65=b1985124-e9bf-4009-a...`
	TXT	`webexdomainverification.4C675B8AEB46B136E053AB06FC0A3F65=a9568d05-1a3d-4c2b-9...`
	TXT	`webexdomainverification.4C675B8A8FC5B136E053AB06FC0A3F65=81f2d6dc-b5b1-4624-9...`
	TXT	`webexdomainverification.4C675B897222B136E053AB06FC0A3F65=cf14e0ca-cfec-4d2b-8...`
	TXT	`adobe-idp-site-verification=5e85ea0ed34d3d2a09f830d0cfc77139471d15e20e771d904...`
	TXT	`ciscocidomainverification=1b32b084b0eb3ade21d6a521cfa1db73d2a787817950f96cf35...`
	TXT	`SDRQ4Pu3aj2Qhnqm0Pu+NCsKPrfBbW56qXduqE9GxA/f5eo+/Ui6umgbTg9PW0hjeg21Q2yCpOALW...`
	TXT	`google-site-verification=zVNJw3i2goXwxAOFiO6ubfIWhKkgRnHS82Q7F6M6Gck`
	TXT	`google-site-verification=8BC5Gnatu9NBfOph_lZpZyG2eDK0iPs0V8Li0RKzin8`
	TXT	`webexdomainverification.2494X=72426cc0-664d-4a80-a6f4-113b7f648c9d`
	TXT	`amazonses:vDxikFPIS0Am8dY/BlMuOFbJ2TuF64fRwUfkUGH67bY=`
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	TXT	`docusign=850d3223-bb46-4946-986b-2410b69ed0e7`
	TXT	`docusign=5a06ea48-7158-4d7c-a47f-624b9d0cebc9`
	TXT	`rh426i3oiis217bktj8o4nd2m2`
	TXT	`atlassian-domain-verification=FfyaIO5BcqxasUU4Cuwp9/4Y3ujXrMEpfhyaPydm5lM6vqD...`
	TXT	`amazonses:93j7xtRaIBE5K+ERCErN+WDNFhQPQ1rY8mCD3Ut5Rqg=`
	TXT	`cisco-ci-domain-verification=25e2351f5ed93561cf171fbead7759b2407183ca513c2c4d...`
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	TXT	`atlassian-domain-verification=VhnxT3ISJLKFyasfowo1iyVXcEqztbz/3PWOQM6LP0kG9Hr...`
	TXT	`amazonses:Socb9IMK/O81TXqIP15y3NAyd8tyEcV6waygbWSPBi0=`
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	TXT	`amazonses:njYRGZSzGLGsQ66bZMwxwZZF4zHx9G8JWosbZeNa7Eo=`
	TXT	`apple-domain-verification=2IrLd0KYEerfwrx6`
	TXT	`apple-domain-verification=rFyOPvcO8sUX2iHP`
	TXT	`amazonses:sFnUJ7LhEsJBsbZON/tFEgtZeGaqZiwY6vCL/+AJXak=`
	TXT	`amazonses:rhL1YpdU4RL+Q7IALiZNww69f5cR1IZDcqEh9fRy6Tg=`
	TXT	`amazonses:QJZljHq4QVLochyWJlHRtF/TQ7CgNwoHHWnOK7AjCWo=`
	TXT	`apple-domain-verification=G25suhrGTYqwbLNS`
	TXT	`apple-domain-verification=FTZHYv0nuXKqjeP8`
	TXT	`amazonses:QLi7vDgXZTFrD/2qNMkfcQtCzsetuefpN50b98lKPA0=`
	TXT	`apple-domain-verification=c8bb3gA2SNfmH0Zx`
	TXT	`apple-domain-verification=8VumNb91MILOLiQZ`
	TXT	`miro-verification=ce1878a9901e3785a9ee9302aaaf4b8f878ff042`
	TXT	`docker-verification=6c54ab12-d26d-44b7-978e-f60aa83a02f3`
	TXT	`mongodb-site-verification=P4xvHdvjB9koHJnGWdIuapplaUGKo9VP`
	TXT	`google-site-verification=bFFD3VwenH37-hj5wbQqLUOAkLjsrX2Tp-LnN1AvpkQ`
	TXT	`0d03wt1mlg5wy8z9pv9pv0rj21pc6137`
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	TXT	`1qM+TU0yI2yC5SbKT6I96/NjwTb/86hET84vn0/fXWW=`
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	TXT	`f71j9q2oprakr7gtedlcau485k`
	TXT	`dv-ToPuPeiy2ojjpiSg4wlEEaJe`
	TXT	`openai-domain-verification=dv-ToPuPeiy2ojjpiSg4wlEEaJe`
	TXT	`jamf-site-verification=g8V3otVBbtqnjBIjIJXrFg`
	TXT	`wOUurBjukuuVfNP30Zyjv13ohvbjr9KVCgIoMfKSL6U=`
	SOA	`nihblox6.nih.gov`hostmaster@nih.gov serial=962436

WOT: SAFE (87/100)
rank #50 globally
rank #1 in the tld

nih.gov

nih.govis the official domain of the National Institutes of Health (NIH), the primary agency of the United States government responsible for biomedical and public health research. It serves as a central portal for health information, research funding opportunities, and scientific publications.

Key facts

Owner / operator: National Institutes of Health (NIH)
TLD:.gov— sponsored
Primary purpose: Portal for biomedical research and health information
Status: active

Semrush Rank:#29 Keywords:35,075,483 Traffic:90,811,136/mo
WOT: SAFE (94/100)
📈 Tranco rank: #124

NIH (National Institutes of Health) is the US federal agency for biomedical and public health research, consisting of 27 institutes and centers. NIH.gov provides access to research, health information, and scientific databases.

NIH websites include PubMed (medical literature), ClinicalTrials.gov (clinical studies), and health information for the public. NIH is the largest public funder of biomedical research globally.

NIH's infrastructure hosts massive scientific databases including PubMed with over 35 million citations and ClinicalTrials.gov with over 450,000 studies.

DNS for nih.gov uses US government infrastructure with high availability requirements for critical health and research services.

Subdomains

stage.github.nih.gov

Same first word

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github.co.jp

github.compare

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github.nl

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github.page

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DNS History

9 records (9 active, 0 former)

●NSnihblox6.nih.gov2026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●NSns.nih.gov2026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●NSns2.nih.gov2026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●NSns3.nih.gov2026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●MXcloud.nih.gov2026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●A185.199.108.1532026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●A185.199.109.1532026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●A185.199.110.1532026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

●A185.199.111.1532026-07-01 → 2026-08-04 · 2 obs

● 2026-07-01 09:32:00
● 2026-08-04 21:37:50

🔍 DNS Trace

Analysis

Hierarchy

stage.github.nih.gov is delegated beneath github.nih.gov.

IP Addresses

github.nih.gov points to the four IP addresses 185.199.108.153, 185.199.109.153, 185.199.110.153 and 185.199.111.153.

Among the host names that share IP numbers with github.nih.gov are www.abagames.github.io, diesel.rs, tshev.com and two others.

Name Servers

The domain github.nih.gov is delegated to these four name servers: nihblox6.nih.gov, ns2.nih.gov, ns3.nih.gov and ns.nih.gov.

There is at least partial name server overlap between github.nih.gov and other domains — nlm.nih.gov, 4.0.0.2.2.f.7.0.6.2.ip6.arpa, 55.40.156.in-addr.arpa and two more among them.

These name servers regularly appear alongside lhcns1.nlm.nih.gov, lhcns2.nlm.nih.gov, dns1-ncbi.ncbi.nlm.nih.gov and 3 other name servers in NS record sets.

Hosts that resolve to one IP address:

ns2.nih.gov resolves to the IP address 128.231.64.1.

Hosts with two IP numbers each:

The A records for ns.nih.gov return 128.231.128.251 and 2607:f220:404:101::80e7:80fb.

Mail Servers

github.nih.gov routes its mail through a single mail server, cloud.nih.gov.

github.nih.gov and domains like cloud.nih.gov share an identical mail server configuration.

The host cloud.nih.gov directs to four IP numbers: 185.199.108.153, 185.199.109.153, 185.199.110.153 and 185.199.111.153.