Simon Property Group Domain Security

Domain security

Domain security posture for Simon Property Group, 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 present, SPF present, DMARC present (p=reject).

Commercial Real EstateE-CommerceFortune 500MallsOutlet CentersReal EstateREITRetail

Transport & Host Security

www.simon.com

HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 4 10:40:13 2026 GMT

www.simonpropertygroup.com

HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Sep 10 15:51:33 2026 GMT

sellersupport.shopsimon.com

HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 4 23:40:18 2026 GMT

Domain (DNS/Email) Security

simon.com

DNSSEC: yes · SPF: yes · DMARC: yes (p=reject) · CAA: yes

simonpropertygroup.com

DNSSEC: no · SPF: yes · DMARC: no · CAA: none

Source

Domain Security

generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.simon.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug  4 10:40:13 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: www.simonpropertygroup.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 10 15:51:33 2026 GMT
  hsts: false
- host: sellersupport.shopsimon.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  4 23:40:18 2026 GMT
  hsts: true
  hsts_max_age: 31536000
domains:
- domain: simon.com
  dnssec: true
  caa:
  - 0 issuewild "amazontrust.com"
  - 0 issuewild "awstrust.com"
  - 0 issuewild "certainly.com"
  - 0 issuewild "digicert.com"
  - 0 issuewild "globalsign.com"
  - 0 issuewild "godaddy.com"
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: simonpropertygroup.com
  dnssec: false
  caa: []
  spf: true
  dmarc: false