DuckDuckGo · Domain Security

Duckduckgo Domain Security

Domain security

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

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Transport & Host Security

duckduckgo.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Nov 19 23:59:59 2026 GMT
api.duckduckgo.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Nov 19 23:59:59 2026 GMT
duck.ai
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 12 02:23:36 2026 GMT

Domain (DNS/Email) Security

duckduckgo.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes
duck.ai
DNSSEC: no · SPF: no · DMARC: no · 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: duckduckgo.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Nov 19 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: api.duckduckgo.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Nov 19 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: duck.ai
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 12 02:23:36 2026 GMT
  hsts: true
  hsts_max_age: 0
domains:
- domain: duckduckgo.com
  dnssec: false
  caa:
  - 0 issue "letsencrypt.org"
  - 0 issue "digicert.com"
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: duck.ai
  dnssec: false
  caa: []
  spf: false
  dmarc: false