CenturyLink (Lumen Technologies) · Domain Security

Centurylink Domain Security

Domain security

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

BroadbandConnectivityEdgeFiberLumenNetworkOAuth 2.0Quantum FiberSD-WANTelecomFortune 500

Transport & Host Security

www.centurylink.com
HTTPS: yes · TLS: TLSv1.2 · HSTS: yes · cert expires: Mar 2 23:59:59 2027 GMT
developer.lumen.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Jan 5 23:59:59 2027 GMT
apimarketplace.lumen.com
HTTPS: yes · HSTS: no

Domain (DNS/Email) Security

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

Source

Domain Security

centurylink-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.centurylink.com
  https: true
  tls_version: TLSv1.2
  cert_expires: Mar  2 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 157680000
- host: developer.lumen.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Jan  5 23:59:59 2027 GMT
  hsts: false
- host: apimarketplace.lumen.com
  https: true
  tls_cert_error: '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has
    expired (_ssl.c:1082)'
  hsts: null
domains:
- domain: centurylink.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: lumen.com
  dnssec: false
  caa:
  - 0 issue "amazon.com"
  - 0 issue "globalsign.com"
  - 0 issuewild "digicert.com"
  - 0 issue "letsencrypt.org"
  - 0 issue "digicert.com"
  - 0 issuewild "globalsign.com"
  spf: true
  dmarc: true
  dmarc_policy: reject