Tucows · Domain Security

Tucows Domain Security

Domain security

Domain security posture for Tucows, 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=none).

CompanyInfrastructureDomainsDNSSSLEmailRegistrarTelecom

Transport & Host Security

tucows.com

HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 11 16:28:54 2026 GMT

domains.opensrs.guide

HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Oct 3 20:40:57 2026 GMT

rr-n1-tor.opensrs.net

HTTPS: yes · TLS: TLSv1.2 · HSTS: yes · cert expires: Sep 27 23:59:59 2026 GMT

Domain (DNS/Email) Security

tucows.com

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

opensrs.guide

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

Source

Domain Security

generated: '2026-07-21'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: tucows.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 11 16:28:54 2026 GMT
  hsts: false
- host: domains.opensrs.guide
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  3 20:40:57 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: rr-n1-tor.opensrs.net
  https: true
  tls_version: TLSv1.2
  cert_expires: Sep 27 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 31536000
domains:
- domain: tucows.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: none
- domain: opensrs.guide
  dnssec: false
  caa: []
  spf: false
  dmarc: true
  dmarc_policy: none