Southwestern Energy · Domain Security

Southwestern Energy Domain Security

Domain security

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

Fortune 500Natural GasEnergyOil And Gas

Transport & Host Security

www.swn.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 4 23:59:59 2026 GMT
ir.swn.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 4 23:59:59 2026 GMT
investors.expandenergy.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 12 23:59:59 2026 GMT

Domain (DNS/Email) Security

swn.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: none
expandenergy.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

southwestern-energy-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.swn.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  4 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: ir.swn.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  4 23:59:59 2026 GMT
  hsts: null
- host: investors.expandenergy.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 12 23:59:59 2026 GMT
  hsts: null
domains:
- domain: swn.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: expandenergy.com
  dnssec: false
  caa:
  - 0 iodef "mailto:itsecmon@expandenergy.com"
  - 0 issuewild "digicert.com"
  - 0 issue "digicert.com"
  - 0 issuewild "globalsign.com"
  - 0 issue "globalsign.com"
  spf: true
  dmarc: true
  dmarc_policy: reject