AK Steel Holding · Domain Security

Ak Steel Holding Domain Security

Domain security

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

AutomotiveManufacturingMaterialsSteelMetalsFortune 500

Transport & Host Security

www.clevelandcliffs.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 20 19:04:39 2026 GMT
ir.aksteel.com
HTTPS: no · HSTS: no

Domain (DNS/Email) Security

clevelandcliffs.com
DNSSEC: yes · SPF: yes · DMARC: yes (p=quarantine) · CAA: none
aksteel.com
DNSSEC: yes · SPF: yes · DMARC: yes (p=reject) · CAA: none

Source

Domain Security

ak-steel-holding-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.clevelandcliffs.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 20 19:04:39 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: ir.aksteel.com
  https: false
domains:
- domain: clevelandcliffs.com
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine
- domain: aksteel.com
  dnssec: true
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject