CDC · Domain Security

Cdc Domain Security

Domain security

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

Public HealthDisease SurveillanceVaccinationHealth StatisticsGovernmentOpen DataEnvironmental HealthMortalityCDC WONDER

Transport & Host Security

open.cdc.gov
HTTPS: no · HSTS: no
data.cdc.gov
HTTPS: yes · TLS: TLSv1.2 · HSTS: yes · cert expires: Jan 16 23:59:59 2027 GMT
wonder.cdc.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 28 13:32:05 2026 GMT

Domain (DNS/Email) Security

cdc.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: open.cdc.gov
  https: false
- host: data.cdc.gov
  https: true
  tls_version: TLSv1.2
  cert_expires: Jan 16 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31536000
- host: wonder.cdc.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 28 13:32:05 2026 GMT
  hsts: null
domains:
- domain: cdc.gov
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject