Citigroup · Domain Security

Citigroup Domain Security

Domain security

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

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Transport & Host Security

www.citigroup.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 25 23:59:59 2026 GMT
developer.citi.com
HTTPS: yes · TLS: TLSv1.2 · HSTS: yes · cert expires: Sep 8 23:59:59 2026 GMT
sandbox.developerhub.citi.com
HTTPS: yes · TLS: TLSv1.2 · HSTS: yes · cert expires: Sep 8 23:59:59 2026 GMT

Domain (DNS/Email) Security

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

Source

Domain Security

citigroup-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.citigroup.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 25 23:59:59 2026 GMT
  hsts: null
- host: developer.citi.com
  https: true
  tls_version: TLSv1.2
  cert_expires: Sep  8 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: sandbox.developerhub.citi.com
  https: true
  tls_version: TLSv1.2
  cert_expires: Sep  8 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 63072000
domains:
- domain: citigroup.com
  dnssec: false
  caa:
  - 128 iodef "mailto:CAADNS@citi.com"
  - 128 issuewild ";"
  - 128 issue "digicert.com"
  - 128 issue "globalsign.com"
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: citi.com
  dnssec: false
  caa:
  - 128 issue "globalsign.com"
  - 128 iodef "mailto:CAADNS@citi.com"
  - 128 issuewild ";"
  - 128 issue "digicert.com"
  spf: true
  dmarc: true
  dmarc_policy: reject