IRS · Domain Security

Irs Domain Security

Domain security

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

IRSTaxFederal GovernmentTIN MatchingIncome VerificationInformation Returnse-FileIdentity VerificationTaxpayer

Transport & Host Security

www.irs.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 24 05:55:53 2026 GMT
la.www4.irs.gov
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 17 12:33:10 2026 GMT

Domain (DNS/Email) Security

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

Source

Domain Security

irs-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.irs.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 24 05:55:53 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: la.www4.irs.gov
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 17 12:33:10 2026 GMT
  hsts: null
domains:
- domain: irs.gov
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject