WorldCat · Domain Security

Worldcat Domain Security

Domain security

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

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Transport & Host Security

www.worldcat.org
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Oct 5 02:44:56 2026 GMT
www.oclc.org
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 25 08:54:21 2026 GMT
americas.discovery.api.oclc.org
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 23 21:59:19 2026 GMT

Domain (DNS/Email) Security

worldcat.org
DNSSEC: yes · SPF: no · DMARC: yes (p=quarantine) · CAA: yes
oclc.org
DNSSEC: yes · SPF: yes · DMARC: yes (p=quarantine) · 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.worldcat.org
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  5 02:44:56 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: www.oclc.org
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 25 08:54:21 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: americas.discovery.api.oclc.org
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 23 21:59:19 2026 GMT
  hsts: null
domains:
- domain: worldcat.org
  dnssec: true
  caa:
  - 0 issuewild "awstrust.com"
  - 0 issuewild "comodoca.com"
  - 0 issuewild "digicert.com; cansignhttpexchanges=yes"
  - 0 issuewild "letsencrypt.org"
  - 0 issuewild "pki.goog; cansignhttpexchanges=yes"
  - 0 issuewild "ssl.com"
  spf: false
  dmarc: true
  dmarc_policy: quarantine
- domain: oclc.org
  dnssec: true
  caa:
  - 0 issuewild "pki.goog; cansignhttpexchanges=yes"
  - 0 issuewild "ssl.com"
  - 128 issue "amazon.com"
  - 0 issue "comodoca.com"
  - 0 issue "digicert.com; cansignhttpexchanges=yes"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: quarantine