National Center for Biotechnology Information (NCBI) · Domain Security

Ncbi Domain Security

Domain security

Domain security posture for National Center for Biotechnology Information (NCBI), probed live across 3 host(s) and 1 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 3 advertise HSTS. Email/DNS controls: DNSSEC present, SPF present, DMARC absent.

BioinformaticsGenomicsLife SciencesPubMedSequencesBLASTTaxonomyChemistryOpen Access

Transport & Host Security

www.ncbi.nlm.nih.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 26 14:06:42 2026 GMT
eutils.ncbi.nlm.nih.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 26 14:06:42 2026 GMT
blast.ncbi.nlm.nih.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 26 14:06:42 2026 GMT

Domain (DNS/Email) Security

nih.gov
DNSSEC: yes · SPF: yes · DMARC: no · CAA: yes

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.ncbi.nlm.nih.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 26 14:06:42 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: eutils.ncbi.nlm.nih.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 26 14:06:42 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: blast.ncbi.nlm.nih.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 26 14:06:42 2026 GMT
  hsts: true
  hsts_max_age: 31536000
domains:
- domain: nih.gov
  dnssec: true
  caa:
  - 0 issuewild "globalsign.com"
  - 0 issuewild "identrust.com"
  - 0 issuewild "letsencrypt.org"
  - 0 issue "letsencrypt.org"
  - 0 issue "digicert.com"
  - 0 issue "amazon.com"
  spf: true
  dmarc: false