Level 3 Communications · Domain Security

Level 3 Communications Domain Security

Domain security

Domain security posture for Level 3 Communications, probed live across 1 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).

TelecommunicationsInternet Service ProviderFiberNetworkingHistoricalFortune 500

Transport & Host Security

www.lumen.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Mar 12 23:59:59 2027 GMT

Domain (DNS/Email) Security

lumen.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

level-3-communications-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.lumen.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Mar 12 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31557600
domains:
- domain: lumen.com
  dnssec: false
  caa:
  - 0 issuewild "digicert.com"
  - 0 issuewild "globalsign.com"
  - 0 issue "globalsign.com"
  - 0 issue "amazon.com"
  - 0 issue "digicert.com"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: reject