pubmed.ncbi.nlm.nih.gov: Website Profile & Alternatives

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.

Domain and Registration

Registered in 1997, this domain has about 28 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses .gov, a restricted namespace whose registration normally has eligibility requirements. Registration contact information is publicly available through RDAP.

DNS and Email

Nameservers are provided by nih.gov, indicating managed DNS hosting. MX records point to the nih.gov email service. DNSSEC is enabled, allowing validating resolvers to authenticate signed DNS data. CAA records restrict which certificate authorities are authorized to issue certificates. No CNAME was found; the observed records resolve directly to addresses.

TLS and Certificates

The certificate uses an RSA 2048-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate is valid for about 198 days in total, with 172 days remaining. The certificate covers the main domain and its usual www hostname.

HTTP and Browser Security

The response lacks these common security headers: CSP, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The via response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies nginx without an exact version.

Technology Stack Analysis

The public page identifies nginx without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

The meta description has 223 characters and may be shortened in search results. Twitter Card metadata is configured. The title has 6 characters, within a common display range. The observed directives allow indexing and link following. No Generator meta tag is publicly exposed.

Hosting and Email

DNSnih.gov

HostingGoogle LLC

Emailnih.gov

Location Kansas City, Missouri, United States 34.107.134.59

User reviews (0)

No reviews yet.

Pages, Search and Sharing

Meta description	PubMed® comprises more than 40 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central and publisher web sites.
Canonical URL	https://pubmed.ncbi.nlm.nih.gov/
Language	English (default)
Twitter Card	summary_large_image

Social Sharing Preview

12 fields

Sharing metadata

og:url	https://pubmed.ncbi.nlm.nih.gov/
og:type	website
og:image	https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image-v2.jpg
og:title	PubMed
og:site_name	PubMed
og:description	PubMed® comprises more than 40 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central and publisher web sites.
og:image:secure_url	https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image-v2.jpg
twitter:url	https://pubmed.ncbi.nlm.nih.gov/
twitter:card	summary_large_image
twitter:image	https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image-v2.jpg
twitter:title	PubMed
twitter:description	PubMed® comprises more than 40 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central and publisher web sites.

robots.txt (opens in a new tab)

45 rules

All bots 0 allowed · 45 disallowed

/api
/rss
/advanced/adv-suggestions/
/terms/
/addToHistory/
/deleteHistory/
/downloadHistory/
/deleteHistoryRecord/
/historyCacheExists/
/*/references/
/*/citations/
/*/export/
/*/citedby/
/*/similar/
/*/adj-nav/
/ajax/
/clipboard/
/clipboard-next-page/
/health/
/deep-health-abstract/
/deep-health-search/
/deep-health-auth/
/error/400/
/error/403/
/error/404/
/error/500/
/results-export-ids/
/results-export-search-data/
/results-export-email-by-search-data/
/results-export-search-by-year/
/send-email/
/list-existing-collections/
/add-to-existing-collection/
/create-and-add-to-new-collection/
/toggle-favorites-collection/
/list-bibliography-delegates/
/add-to-bibliography/
/create-saved-search/
/create-rss-feed-url/
/searches/
/collections/
/more/
/suggestions/
/try-search-term/
/rss-feed/
IntervalCrawl delay 1 seconds

Sitemaps

1

https://pubmed.ncbi.nlm.nih.gov/sitemap?p=index.xml(opens in a new tab)

Registration details RDAP / WHOIS

Registrar	get.gov
Registered	1997-10-02
Expires	2027-08-22
Domain status	server transfer prohibited
Nameservers	ns.nih.gov、ns2.nih.gov、ns3.nih.gov
DNSSEC	signed

DNS records

Type	Name	Value	TTL	Priority
A	pubmed.ncbi.nlm.nih.gov	34.107.134.59	79810	—
AAAA	pubmed.ncbi.nlm.nih.gov	2600:1901:0:c831::	86171	—
MX	nih.gov	nihcesxway3.hub.nih.gov	6123	10
MX	nih.gov	nihcesxway4.hub.nih.gov	6123	10
MX	nih.gov	nihcesxway5.hub.nih.gov	6123	10
MX	nih.gov	nihcesxway6.hub.nih.gov	6123	10
MX	nih.gov	nihcesxwayst03.hub.nih.gov	6123	10
MX	nih.gov	nihcesxwayst04.hub.nih.gov	6123	10
MX	nih.gov	nihcesxwayst05.hub.nih.gov	6123	10
MX	nih.gov	nihcesxwayst06.hub.nih.gov	6123	10
NS	nih.gov	ns.nih.gov	4538	—
NS	nih.gov	ns2.nih.gov	4538	—
NS	nih.gov	ns3.nih.gov	4538	—
TXT	nih.gov	0d03wt1mlg5wy8z9pv9pv0rj21pc6137	300	—
TXT	nih.gov	1qM+TU0yI2yC5SbKT6I96/NjwTb/86hET84vn0/fXWW=	300	—
TXT	nih.gov	9r2uhuv5j9qptpgu2ggt9bedgh	300	—
TXT	nih.gov	SDRQ4Pu3aj2Qhnqm0Pu+NCsKPrfBbW56qXduqE9GxA/f5eo+/Ui6umgbTg9PW0hjeg21Q2yCpOALWHqZ91OwZQ==	300	—
TXT	nih.gov	YlLYOocbRZcMeei5s0g/6cFJWMNb3AljE+bns/TE/e4=	300	—
TXT	nih.gov	_0i392yrtc0z5vy7dpsmgeoukvw7bysw	300	—
TXT	nih.gov	_acquiaplatform.nih.gov:YlLYOocbRZcMeei5s0g/6cFJWMNb3AljE+bns/TE/e4=	300	—
TXT	nih.gov	_ai4lciv17rnka4jdu9z7ft5dkdn6cwi	300	—
TXT	nih.gov	_jiomcldogudftjarbrdx4kt57mzu5xv	300	—
TXT	nih.gov	adobe-idp-site-verification=5e85ea0ed34d3d2a09f830d0cfc77139471d15e20e771d90484e89895b0a9f1e	300	—
TXT	nih.gov	adobe-sign-verification=1e4a7a1987a2efa2d94b3cdcf717ec0b5d1dcbcb8c16a5d2bc4ea7c4dbcd2210	300	—
TXT	nih.gov	amazonses:6dUQp3PJw2/pPriaGheRkNX6rVRchTDJCVkzGLDtftA=	300	—
TXT	nih.gov	amazonses:93j7xtRaIBE5K+ERCErN+WDNFhQPQ1rY8mCD3Ut5Rqg=	300	—
TXT	nih.gov	amazonses:Ckm+FeqyUMSBHOvsBsDHWeb1nuGAr6AWg5crTuJh47k=	300	—
TXT	nih.gov	amazonses:EpIukSNkqrJBid632tohg9ghfR9ZOm2BsQKY8fKESvs=	300	—
TXT	nih.gov	amazonses:F99Cv1zG5C8JOyxlwPmjFx3qCOyQ7xJdwsNMHiJbEew=	300	—
TXT	nih.gov	amazonses:Oq2yjJ17I+Cqlgpxl9Pto0uQ7gwb0IpbhQFCHjPwuGo=	300	—
TXT	nih.gov	amazonses:QJZljHq4QVLochyWJlHRtF/TQ7CgNwoHHWnOK7AjCWo=	300	—
TXT	nih.gov	amazonses:QLi7vDgXZTFrD/2qNMkfcQtCzsetuefpN50b98lKPA0=	300	—
TXT	nih.gov	amazonses:Socb9IMK/O81TXqIP15y3NAyd8tyEcV6waygbWSPBi0=	300	—
TXT	nih.gov	amazonses:njYRGZSzGLGsQ66bZMwxwZZF4zHx9G8JWosbZeNa7Eo=	300	—
TXT	nih.gov	amazonses:rhL1YpdU4RL+Q7IALiZNww69f5cR1IZDcqEh9fRy6Tg=	300	—
TXT	nih.gov	amazonses:sFnUJ7LhEsJBsbZON/tFEgtZeGaqZiwY6vCL/+AJXak=	300	—
TXT	nih.gov	amazonses:vDxikFPIS0Am8dY/BlMuOFbJ2TuF64fRwUfkUGH67bY=	300	—
TXT	nih.gov	apple-domain-verification=2IrLd0KYEerfwrx6	300	—
TXT	nih.gov	apple-domain-verification=8VumNb91MILOLiQZ	300	—
TXT	nih.gov	apple-domain-verification=FTZHYv0nuXKqjeP8	300	—
TXT	nih.gov	apple-domain-verification=G25suhrGTYqwbLNS	300	—
TXT	nih.gov	apple-domain-verification=c8bb3gA2SNfmH0Zx	300	—
TXT	nih.gov	apple-domain-verification=rFyOPvcO8sUX2iHP	300	—
TXT	nih.gov	asv=855b0f13024fcf78abf33cd1ef636c24	300	—
TXT	nih.gov	atlassian-domain-verification=5I70E3MqAbQ9rCDoKlyjMB5STNFM2xRdvGSKSghuwgN4belFRwLsmIACp85aACc/	300	—
TXT	nih.gov	atlassian-domain-verification=FfyaIO5BcqxasUU4Cuwp9/4Y3ujXrMEpfhyaPydm5lM6vqDALuZFv8QqJI6qUPVp	300	—
TXT	nih.gov	atlassian-domain-verification=VhnxT3ISJLKFyasfowo1iyVXcEqztbz/3PWOQM6LP0kG9HrAlq/21h27cbqTwdxw	300	—
TXT	nih.gov	atlassian-domain-verification=wdcwOCoxzIePKKuoOG918QCLMqYKy85i2g2UFoGlTcp32Eifql11S8xMtj1bxytf	300	—
TXT	nih.gov	cisco-ci-domain-verification=25e2351f5ed93561cf171fbead7759b2407183ca513c2c4d7eb88be637a59b7f	300	—
TXT	nih.gov	cisco-ci-domain-verification=50a17b6053e0cdf1c50621c42ad27e55c2e1d58f0249a1f48b4509f30b849701	300	—
TXT	nih.gov	ciscocidomainverification=1b32b084b0eb3ade21d6a521cfa1db73d2a787817950f96cf35fe67d6fa84685	300	—
TXT	nih.gov	da1dfl8ipaafpqsh40iiuubf7n	300	—
TXT	nih.gov	docker-verification=6c54ab12-d26d-44b7-978e-f60aa83a02f3	300	—
TXT	nih.gov	docusign=5a06ea48-7158-4d7c-a47f-624b9d0cebc9	300	—
TXT	nih.gov	docusign=850d3223-bb46-4946-986b-2410b69ed0e7	300	—
TXT	nih.gov	dv-ToPuPeiy2ojjpiSg4wlEEaJe	300	—
TXT	nih.gov	errsvkc5n4e7ra1rouc8d79kbh	300	—
TXT	nih.gov	f71j9q2oprakr7gtedlcau485k	300	—
TXT	nih.gov	google-site-verification=8BC5Gnatu9NBfOph_lZpZyG2eDK0iPs0V8Li0RKzin8	300	—
TXT	nih.gov	google-site-verification=bFFD3VwenH37-hj5wbQqLUOAkLjsrX2Tp-LnN1AvpkQ	300	—
TXT	nih.gov	google-site-verification=zVNJw3i2goXwxAOFiO6ubfIWhKkgRnHS82Q7F6M6Gck	300	—
TXT	nih.gov	gqtebtnc7mnjj8e5hmf3sdq3vk	300	—
TXT	nih.gov	graphpad.com:domain-verification=gN34VRAg6P9tjzcJQp3UzA	300	—
TXT	nih.gov	identrust_validate=n7BmXlMZM4qNvYOHyZEwIZ1EN76JW0zd+C6l4Q39y2Vw	300	—
TXT	nih.gov	jamf-site-verification=M8F5AAUS0P9xpygyoWq8eg	300	—
TXT	nih.gov	jamf-site-verification=g8V3otVBbtqnjBIjIJXrFg	300	—
TXT	nih.gov	kt4ej3geqjaj80k3ttross1f14	300	—
TXT	nih.gov	miro-verification=ce1878a9901e3785a9ee9302aaaf4b8f878ff042	300	—
TXT	nih.gov	mongodb-site-verification=P4xvHdvjB9koHJnGWdIuapplaUGKo9VP	300	—
TXT	nih.gov	mongodb-site-verification=gnP2xDWxNwIi8HvCaZxCA9DYeIIsM908	300	—
TXT	nih.gov	openai-domain-verification=dv-ToPuPeiy2ojjpiSg4wlEEaJe	300	—
TXT	nih.gov	pbj2k0thl8k6bc1b5igtqqghls	300	—
TXT	nih.gov	pknf061r79fsrzbmcpgnhygf1j8nvxy8	300	—
TXT	nih.gov	rh426i3oiis217bktj8o4nd2m2	300	—
TXT	nih.gov	rqgo340ej7cot82fsehrp6l5ap	300	—
TXT	nih.gov	sv6eiguevqe64cojov3psnedd2	300	—
TXT	nih.gov	t6cijkcds8tua8rmnpvqe2d470	300	—
TXT	nih.gov	uub8i3goc70aj1kvl0neuhle5v	300	—
TXT	nih.gov	v7959lz5pgb250x8gzt0fkg7j4x1s6bw	300	—
TXT	nih.gov	v=spf1 ip4:128.231.90.64/26 ip4:165.112.13.0/26 ip4:156.40.79.128/25 ip4:128.231.89.192/28 ip4:165.112.69.16/28 ip4:165.112.194.0/25 ip6:2607:f220:0404:8104::0/64 ip6:2607:f220:402:1a01::0/64 ip6:2607:f220:404:12e::/64 ip6:2607:f220:402:12e::/64 include:spf.protection.outlook.com ~all	300	—
TXT	nih.gov	wOUurBjukuuVfNP30Zyjv13ohvbjr9KVCgIoMfKSL6U=	300	—
TXT	nih.gov	webexdomainverification.2494X=72426cc0-664d-4a80-a6f4-113b7f648c9d	300	—
TXT	nih.gov	webexdomainverification.4C675B897222B136E053AB06FC0A3F65=cf14e0ca-cfec-4d2b-83ab-5971ee749040	300	—
TXT	nih.gov	webexdomainverification.4C675B8A8FC5B136E053AB06FC0A3F65=81f2d6dc-b5b1-4624-9e3f-278cb4163770	300	—
TXT	nih.gov	webexdomainverification.4C675B8AEB46B136E053AB06FC0A3F65=a9568d05-1a3d-4c2b-9f45-3b5d786db694	300	—
TXT	nih.gov	webexdomainverification.4C675B8AF44FB136E053AB06FC0A3F65=b1985124-e9bf-4009-a584-7dee024dc7e9	300	—
TXT	nih.gov	x1htw52vr2t3416zs29gg8lq0zkw744c	300	—
CAA	nih.gov	0 issue "amazon.com"	7200	—
CAA	nih.gov	0 issue "digicert.com"	7200	—
CAA	nih.gov	0 issue "entrust.net"	7200	—
CAA	nih.gov	0 issue "globalsign.com"	7200	—
CAA	nih.gov	0 issue "godaddy.com"	7200	—
CAA	nih.gov	0 issue "identrust.com"	7200	—
CAA	nih.gov	0 issue "letsencrypt.org"	7200	—
CAA	nih.gov	0 issue "sectigo.com"	7200	—
CAA	nih.gov	0 issuewild "amazon.com"	7200	—
CAA	nih.gov	0 issuewild "digicert.com"	7200	—
CAA	nih.gov	0 issuewild "globalsign.com"	7200	—
CAA	nih.gov	0 issuewild "godaddy.com"	7200	—
CAA	nih.gov	0 issuewild "identrust.com"	7200	—
CAA	nih.gov	0 issuewild "letsencrypt.org"	7200	—
CAA	nih.gov	0 issuewild "sectigo.com"	7200	—
DS	nih.gov	36469 8 2 4dd8f9c4c445b7588d2b8fd48af7a754777ace002521c05c1992db1cf2f09eed	3600	—
DS	nih.gov	51547 8 2 b18e5d91bb477a4040d5cbfa22de598224340d0168856aefaeeedadd192bdcf5	3600	—
DMARC	_dmarc.nih.gov	v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=1;	6547	—

TLS and certificates

Assessment	Normal configuration
Supported protocols	TLSv1.2、TLSv1.3
Negotiated protocol	TLSv1.3
Certificate subject	pubmed.ncbi.nlm.nih.gov
Issuer	GoDaddy.com
Valid until	2027-03-12T16:38 · Remaining when checked: 172 days
Verification details	Certificate trust: Passed · Hostname match: Passed

HTTP response headers

Header	Value
content-type	text/html; charset=utf-8
cache-control	private
server	nginx
strict-transport-security	max-age=31536000; includeSubDomains; preload
x-frame-options	DENY
x-content-type-options	nosniff
referrer-policy	same-origin
set-cookie	Redacted

Identified technologies

nginx

Recent Updates

Website images2026-09-21 00:31
Screenshots2026-09-21 00:31
Network details2026-09-21 00:31
Website Technologies2026-09-21 00:31
Pages and Search Information2026-09-21 00:31
HTTP Response Information2026-09-21 00:31
TLS and certificates2026-09-21 00:31
DNS Information2026-09-21 00:31
Domain Registration2026-09-21 00:31
Website profile2026-09-21 00:31
Website Description2026-09-21 00:31
Website Name2026-09-21 00:31
Website profile2026-09-19 09:59
Website Description2026-09-19 09:59
Website Name2026-09-19 09:59

pubmed.ncbi.nlm.nih.gov No paid content found

Feedback pubmed.ncbi.nlm.nih.gov information

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