CodePen · Domain Security

Codepen Domain Security

Domain security

Domain security posture for CodePen, 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 present, DMARC present (p=none).

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Transport & Host Security

codepen.io
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 14 02:58:23 2026 GMT
blog.codepen.io
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 24 07:16:00 2026 GMT
public.codepenassets.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 5 20:29:37 2026 GMT

Domain (DNS/Email) Security

codepen.io
DNSSEC: yes · SPF: yes · DMARC: yes (p=none) · CAA: none
codepenassets.com
DNSSEC: yes · SPF: yes · DMARC: yes (p=none) · CAA: none

Source

Domain Security

codepen-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: codepen.io
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 14 02:58:23 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: blog.codepen.io
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 24 07:16:00 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: public.codepenassets.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  5 20:29:37 2026 GMT
  hsts: null
domains:
- domain: codepen.io
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: none
- domain: codepenassets.com
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: none