Columbia University · Domain Security

Columbia Domain Security

Domain security

Domain security posture for Columbia University, probed live across 3 host(s) and 1 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 0 advertise HSTS. Email/DNS controls: DNSSEC absent, SPF present, DMARC present (p=none).

EducationHigher EducationUniversityOpen DataLibraryIdentityUnited States

Transport & Host Security

www.columbia.edu
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 5 23:58:29 2026 GMT
opendataservice.columbia.edu
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 15 09:34:03 2026 GMT
library.columbia.edu
HTTPS: yes · TLS: TLSv1.2 · HSTS: no · cert expires: Jan 23 23:59:59 2027 GMT

Domain (DNS/Email) Security

columbia.edu
DNSSEC: no · SPF: yes · DMARC: yes (p=none) · CAA: none

Source

Domain Security

columbia-domain-security.yml Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.columbia.edu
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  5 23:58:29 2026 GMT
  hsts: null
- host: opendataservice.columbia.edu
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 15 09:34:03 2026 GMT
  hsts: null
- host: library.columbia.edu
  https: true
  tls_version: TLSv1.2
  cert_expires: Jan 23 23:59:59 2027 GMT
  hsts: false
domains:
- domain: columbia.edu
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: none