T-Mobile · Domain Security

T Mobile Domain Security

Domain security

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

TelecommunicationsWirelessMobile5G

Transport & Host Security

www.t-mobile.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Feb 8 23:59:59 2027 GMT
developer.t-mobile.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 8 11:13:19 2026 GMT

Domain (DNS/Email) Security

t-mobile.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

t-mobile-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.t-mobile.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Feb  8 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31536000
- host: developer.t-mobile.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  8 11:13:19 2026 GMT
  hsts: null
domains:
- domain: t-mobile.com
  dnssec: false
  caa:
  - 0 issuewild "amazon.com"
  - 0 issuewild "globalsign.com"
  - 0 issuewild "pki.goog"
  - 0 issue "letsencrypt.org"
  - 0 iodef "mailto:pki-admin@t-mobile.com"
  - 0 issue "digicert.com"
  spf: true
  dmarc: true
  dmarc_policy: reject