generated: '2026-08-29'
method: probed
source: live DNS/TLS/HTTP probes of every stepful.com host discovered during enrichment
note: >-
  Stepful publishes no API host. The hosts below are its marketing site (Webflow behind
  Cloudflare), its authenticated student classroom and staff admin applications, its asset
  CDN, and two vendor subdomains CNAME'd to third parties (c.stepful.com -> Converge /
  runconverge.com, k.stepful.com -> PostHog / proxyhog.com). Vendor-operated hosts are
  recorded for completeness but their posture is the vendor's, not Stepful's.
hosts:
- host: www.stepful.com
  https: true
  tls_version: TLSv1.3
  cert_valid: true
  cert_expires: 'Oct  7 23:52:27 2026 GMT'
  hsts: false
  server: cloudflare
  operator: stepful
  role: marketing site (Webflow)
- host: classroom.stepful.com
  https: true
  tls_version: TLSv1.3
  cert_valid: true
  hsts: true
  hsts_max_age: 63072000
  hsts_include_subdomains: true
  server: cloudflare
  operator: stepful
  role: authenticated student learning application (Rails/Devise)
- host: admin.stepful.com
  https: true
  tls_version: TLSv1.3
  cert_valid: true
  hsts: true
  hsts_max_age: 63072000
  hsts_include_subdomains: true
  server: Heroku
  operator: stepful
  role: authenticated staff admin application (Rails/Devise)
- host: asset-cdn.stepful.com
  https: true
  tls_version: TLSv1.3
  cert_valid: true
  hsts: true
  hsts_max_age: 63072000
  hsts_include_subdomains: true
  server: cloudflare
  operator: stepful
  role: static asset CDN (CloudFront)
- host: c.stepful.com
  https: true
  tls_version: TLSv1.3
  cert_valid: true
  hsts: true
  hsts_max_age: 31536000
  hsts_include_subdomains: true
  csp: true
  x_frame_options: DENY
  x_content_type_options: nosniff
  operator: third-party (Converge, runconverge.com)
  role: first-party-domain analytics/attribution proxy; CNAME dqhzqrkt8v2js.cloudfront.net
- host: k.stepful.com
  https: true
  operator: third-party (PostHog)
  role: product-analytics reverse proxy; CNAME d4f93c1a51f965c39c9e.cf-prod-us-proxy.proxyhog.com
domains:
- domain: stepful.com
  dnssec: false
  caa: []
  spf: true
  spf_record: 'v=spf1 include:_spf.google.com ~all'
  dmarc: true
  dmarc_policy: none
  dmarc_record: 'v=DMARC1; p=none; rua=mailto:postmaster@stepful.com; pct=100; adkim=s; aspf=s'
findings:
- No CAA record is published for stepful.com, so any public CA may issue for the domain.
- DNSSEC is not enabled on stepful.com.
- DMARC is published but at p=none, so no enforcement action is requested of receivers.
- The apex marketing host www.stepful.com does not send HSTS, while every application host does.