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Gridlode
Rank #86Updated November 10, 2026

ncbi.nlm.nih.gov

National Center for Biotechnology Information

ncbi.nlm.nih.gov is registered with get.gov since October 2, 1997 (29.1 years). The registration expires on August 22, 2027. The site runs on Crazy Egg, Google Cloud, Content Security Policy and 2 other technologies. Its email security grade is B. Its SSL certificate is issued by GoDaddy.com and is valid for 124 more days.

Domain age
29.1 yrs
Technologies
5
Email security
B
SSL days left
124

Registration

Registrarget.gov
IANA ID8888888
RegisteredOctober 2, 1997
ExpiresAugust 22, 2027
UpdatedAugust 14, 2026
Statusserver transfer prohibited
Name serversns.nih.gov, ns2.nih.gov, ns3.nih.gov
DNSSECSigned
RegistrantDepartment of Health and Human Services, United States

DNS records

TypeValueTTL
A34.107.134.594803
MXnihcesxway.hub.nih.gov 10604800
MXnihcesxway2.hub.nih.gov 10604800
MXnihcesxway3.hub.nih.gov 10604800
MXnihcesxway4.hub.nih.gov 10604800
MXnihcesxway5.hub.nih.gov 10604800
NSns.nih.gov604800
NSns2.nih.gov604800
NSns3.nih.gov604800
NSlhcns1.nlm.nih.gov604800
NSlhcns2.nlm.nih.gov604800
NSdns1-ncbi.ncbi.nlm.nih.gov604800
NSdns2-ncbi.ncbi.nlm.nih.gov604800
CAAissue 0 godaddy.com172800
CAAissue 0 letsencrypt.org172800
CAAissuewild 0 godaddy.com172800
CAAissuewild 0 letsencrypt.org172800
TXT5ongv773afed7ghag3eubs9v6c7200
TXT6ochlmevf91qg4f4aq6bo33ofk7200
TXT21mn4fyhz69y985h80bcyrf4vjqjl0ln7200
TXT64ae187888c443b49126410c89e19f917200
TXTgoogle-site-verification=nMmA8DdB_FATP9hChkks7To1ndl-jGwVn624WV03SJg7200
TXTgoogle-site-verification=r_gJSAUUa9jLHjrDalVHx6YDW-U-bIXvV5RAq4l1BEI7200
TXT+UYkiJ9LhpTEGd+XduX0MaAclYq9qoJF4Ls5FJaAwl6LRx4aozocl8ZRea9MKMRaquSBJaZC52liuRb0rkxAMA==7200
TXTatlassian-domain-verification=1Mi0HobTzskd0jqq3f59y5vV5pWXtVef8KDLBLI0T6rwrEwyBQQzows8vpokr4327200
TXTatlassian-domain-verification=W88ajOd1jyG93Lc6UFayJUSeZu6mMuIy2dci0m72EbKbb3tooGBWY3FKvObXWtVE7200
TXTv=spf1 ip4:130.14.26.0/25 ip4:165.112.9.132 ip4:130.14.19.0/24 ip4:130.14.28.0/24 ip4:10.65.8.60 ip4:130.14.22.0/24 ip4:128.231.90.64/26 ip4:165.112.13.0/26 ip6:2607:f220:0404:8104::0/64 ip6:2607:f220:402:1a01::0/64 ip4:63.150.153.0/28 ip4:63.236.109.192/28 ip4:63.236.97.64/27 ip4:66.77.66.64/26 ip4:63.236.105.192/28 ip4:63.236.106.128/27 ip4:68.177.111.128/26 ip4:156.40.79.128/25 ip4:165.112.194.0/25 ip6:2607:f220:041e:4260::41/64 ip6:2607:f220:041e:4260::42/64 ip6:2607:f220:041e:4260::15/64 ip6:2607:f220:041e:4260::16/64 ip6:2607:f220:41f:4260::132/64 include:nih.gov -all7200
AAAA2600:1901:0:c831::4027

Technology stack

Analytics
Crazy Egg
Hosting
Google Cloud
Security
Content Security PolicyHSTS
Web server
Apache HTTP Server

SSL certificate

ValidValid
IssuerUS, GoDaddy TLS Intermediate CA DV - R1v1, GoDaddy.com
ExpiresMarch 14, 2027
Days remaining124
ProtocolTLSv1.3
Names*.ncbi.nlm.nih.gov, ncbi.nlm.nih.gov

Email security

BScore 83/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
  • warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
  • warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
  • goodSPF record found.
  • goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
  • goodDMARC policy is reject: mail that fails authentication is blocked.
  • goodDMARC aggregate reports are sent to mailto:[email protected], mailto:[email protected].
  • goodDKIM keys found (selector: selector1, selector2, k1, k2, s1, s2).
  • good8 MX record(s) found.

Homepage metadata

TitleNational Center for Biotechnology Information
Languageen
IndexableYes
Word count324

About ncbi.nlm.nih.gov

Who is the registrar of ncbi.nlm.nih.gov?

ncbi.nlm.nih.gov is registered with get.gov (IANA ID 8888888).

When does ncbi.nlm.nih.gov expire?

The current registration of ncbi.nlm.nih.gov expires on August 22, 2027. It was first registered on October 2, 1997.

What technology does ncbi.nlm.nih.gov use?

We detected 5 technologies on ncbi.nlm.nih.gov, including Crazy Egg, Google Cloud, Content Security Policy, HSTS, Apache HTTP Server.

Does ncbi.nlm.nih.gov protect its email with SPF and DMARC?

ncbi.nlm.nih.gov scores 83/100 (grade B) for email security. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection. No TLS-RPT record, so you won't hear about failed encrypted deliveries.

What are the name servers of ncbi.nlm.nih.gov?

ncbi.nlm.nih.gov uses ns.nih.gov, ns2.nih.gov, ns3.nih.gov, lhcns1.nlm.nih.gov, lhcns2.nlm.nih.gov, dns1-ncbi.ncbi.nlm.nih.gov, dns2-ncbi.ncbi.nlm.nih.gov.