Callisto Media · Domain Security

Callisto Media Domain Security

Domain security

Domain security posture for Callisto Media, probed live across 3 host(s) and 3 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=quarantine).

CompanyPublishingBook PublishingEducational PublishingChildren's BooksNonfictionMediaConsumer ProductsData-Driven PublishingAcquiredUnited States

Transport & Host Security

www.sourcebooks.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Oct 5 12:07:30 2026 GMT
www.callistopublishing.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Nov 25 23:59:59 2026 GMT
callistomedia.com
HTTPS: no · HSTS: no

Domain (DNS/Email) Security

sourcebooks.com
DNSSEC: no · SPF: yes · DMARC: yes (p=quarantine) · CAA: none
callistopublishing.com
DNSSEC: no · SPF: yes · DMARC: no · CAA: none
callistomedia.com
DNSSEC: no · SPF: yes · DMARC: yes (p=none) · CAA: none

Source

Domain Security

callisto-media-domain-security.yml Raw ↑ 
generated: '2026-08-02'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml hosts plus the legacy Callisto Media domains
notes: 'Callisto Media has no host of its own. callistomedia.com serves only an HTTP
  301 to callistopublishing.com (port 443 does not answer), callistopublishing.com
  is a CloudFront CNAME that 301s to sourcebooks.com/callisto, and www.sourcebooks.com
  is the Sourcebooks storefront that now carries the Callisto brand. Absence of a record
  is recorded as observed, not inferred.'
hosts:
- host: www.sourcebooks.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  5 12:07:30 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: www.callistopublishing.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Nov 25 23:59:59 2026 GMT
  hsts: false
  redirects_to: https://www.sourcebooks.com/callisto/
- host: callistomedia.com
  https: false
  https_note: TCP connect to port 443 timed out on 2026-08-02; HTTP port 80 answers
    301 to https://www.callistopublishing.com
  hsts: false
  redirects_to: https://www.callistopublishing.com
domains:
- domain: sourcebooks.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine
- domain: callistopublishing.com
  dnssec: false
  caa: []
  caa_note: apex is a CNAME to dnejtelqn5d5p.cloudfront.net, so no CAA record is served
  spf: true
  spf_record: v=spf1 include:spf.protection.outlook.com -all
  dmarc: false
- domain: callistomedia.com
  dnssec: false
  caa: []
  spf: true
  spf_record: v=spf1 include:spf.protection.outlook.com -all
  dmarc: true
  dmarc_policy: none
  dmarc_record: v=DMARC1; p=none; rua=mailto:it-dmarc@callistomedia.com
  mx: true
  mx_note: callistomedia-com.mail.protection.outlook.com — the legacy mail domain is
    still live on Microsoft 365 even though the website is gone

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