United States Steel · Domain Security

United States Steel Domain Security

Domain security

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

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Transport & Host Security

www.ussteel.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Jan 13 23:59:59 2027 GMT
steeltrack.ussteel.com
HTTPS: no · HSTS: no

Domain (DNS/Email) Security

ussteel.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · 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.ussteel.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Jan 13 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31536000
- host: steeltrack.ussteel.com
  https: false
domains:
- domain: ussteel.com
  dnssec: false
  caa:
  - ;; connection timed out; no servers could be reached
  spf: true
  dmarc: true
  dmarc_policy: reject