Smithsonian Institution · Domain Security

Smithsonian Institution Domain Security

Domain security

Domain security posture for Smithsonian Institution, probed live across 2 host(s) and 1 registrable domain(s). 2 host(s) serve HTTPS (up to TLSv1.3); 0 advertise HSTS. Email/DNS controls: DNSSEC present, SPF present, DMARC present (p=reject).

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Transport & Host Security

www.si.edu
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 16 09:59:07 2026 GMT
edan.si.edu
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Jan 16 23:59:59 2027 GMT

Domain (DNS/Email) Security

si.edu
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.si.edu
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 16 09:59:07 2026 GMT
  hsts: false
- host: edan.si.edu
  https: true
  tls_version: TLSv1.3
  cert_expires: Jan 16 23:59:59 2027 GMT
  hsts: false
domains:
- domain: si.edu
  dnssec: true
  caa:
  - 0 issue "letsencrypt.org"
  - 0 issue "digicert.com"
  - 0 issue "sectigo.com"
  - 0 issue "ssl.com"
  - 0 issue "pki.goog; cansignhttpexchanges=yes"
  spf: true
  dmarc: true
  dmarc_policy: reject