National Cancer Institute · Domain Security

National Cancer Institute Domain Security

Domain security

Domain security posture for National Cancer Institute, probed live across 3 host(s) and 1 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 2 advertise HSTS. Email/DNS controls: DNSSEC present, SPF present, DMARC present (p=reject).

CancerFederal GovernmentHealthResearch

Transport & Host Security

www.cancer.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 2 12:17:56 2026 GMT
gdc.cancer.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Mar 21 23:59:59 2027 GMT
api.gdc.cancer.gov
HTTPS: yes · TLS: TLSv1.2 · HSTS: no · cert expires: Nov 21 23:59:59 2026 GMT

Domain (DNS/Email) Security

cancer.gov
DNSSEC: yes · SPF: yes · DMARC: yes (p=reject) · 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.cancer.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  2 12:17:56 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: gdc.cancer.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Mar 21 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31536000
- host: api.gdc.cancer.gov
  https: true
  tls_version: TLSv1.2
  cert_expires: Nov 21 23:59:59 2026 GMT
  hsts: null
domains:
- domain: cancer.gov
  dnssec: true
  caa:
  - 0 issue "identrust.com"
  - 0 issue "sectigo.com"
  - 0 issue "letsencrypt.org"
  - 0 issue "amazon.com"
  - 0 issue "entrust.net"
  - 0 issue "digicert.com"
  spf: true
  dmarc: true
  dmarc_policy: reject