Library of Congress · Domain Security

Library Of Congress Domain Security

Domain security

Domain security posture for Library of Congress, probed live across 3 host(s) and 2 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 1 advertise HSTS. Email/DNS controls: DNSSEC present, SPF present, DMARC present (p=none).

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Transport & Host Security

www.loc.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 12 02:51:22 2026 GMT
chroniclingamerica.loc.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 13 04:56:11 2026 GMT
api.congress.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 28 11:20:55 2026 GMT

Domain (DNS/Email) Security

loc.gov
DNSSEC: yes · SPF: yes · DMARC: yes (p=none) · CAA: none
congress.gov
DNSSEC: yes · SPF: yes · DMARC: yes (p=reject) · CAA: none

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.loc.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 12 02:51:22 2026 GMT
  hsts: true
  hsts_max_age: 3600
- host: chroniclingamerica.loc.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 13 04:56:11 2026 GMT
  hsts: null
- host: api.congress.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 28 11:20:55 2026 GMT
  hsts: null
domains:
- domain: loc.gov
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: none
- domain: congress.gov
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject