python-guide.readthedocs.io - dns.ninja

python-guide.readthedocs.io

DNSSEC⚠️ Not signed
A2606:4700::6810:fd78🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700::6810:fe78🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.16.253.120Cloudflare104.16.240.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.16.254.120Cloudflare104.16.240.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.16.253.120, 104.16.254.120
IPv6 hints2606:4700::6810:fd78, 2606:4700::6810:fe78

readthedocs.io

DNSSEC⚠️ Not signed
A2606:4700::6810:fd78🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700::6810:fe78🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.16.253.120Cloudflare104.16.240.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.16.254.120Cloudflare104.16.240.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSivan.ns.cloudflare.com ⭐
NStegan.ns.cloudflare.com
MXaspmx.l.google.com ⭐
MXalt1.aspmx.l.google.com(5)
MXalt2.aspmx.l.google.com(5)
MXaspmx2.googlemail.com(10)
MXaspmx3.googlemail.com(10)
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.16.253.120, 104.16.254.120
IPv6 hints2606:4700::6810:fd78, 2606:4700::6810:fe78
SOAivan.ns.cloudflare.comdns@cloudflare.com serial=2405546300
rank #270 globally
rank #3 in the tld

readthedocs.io

readthedocs.io is the domain used by the Read the Docs documentation hosting service, operated by Read the Docs, Inc.

Key facts

  • Owner / operator: Read the Docs, Inc.
  • TLD:.io— infrastructure
  • Primary purpose: hosting documentation for software projects (Sphinx, MkDocs, etc.)
  • Status: active

Notable subdomains or services

  • *.readthedocs.io— provides per‑project documentation sites.

Related domains

  • readthedocs.org— main website and canonical domain.
WOT: SAFE (61/100)
📈 Tranco rank: #843
readthedocs.io - Tranco Rank (30d: ↑+122)830850900950978May 10May 20May 30Jun 9Jun 19Rank#965#843

Read the Docs

Read the Docs is a documentation hosting platform founded in 2010 that enables software teams to build, version, and deploy project documentation using a "docs as code" workflow integrated with Git. The platform supports major documentation tools including Sphinx, MkDocs, and Jupyter Book.

Services

  • Read the Docs Community (readthedocs.org) — Free hosting for open-source projects with ad-supported infrastructure
  • Read the Docs for Business (readthedocs.com) — Commercial tier starting at $50/month with private repositories, private docs, SSO, and team management

Key Features

  • Automatic deployment previews on pull requests
  • Version management across branches and tags
  • Integrated search functionality
  • YAML-based configuration
  • GitHub, GitLab, Bitbucket, and SSH integration

Notable Users

Major organizations including AMD, Canonical, and Anaconda. Open-source projects such as Flask, Jupyter, and Godot Engine rely on the platform.

Infrastructure

  • Nameservers: Cloudflare (ivan.ns.cloudflare.com,tegan.ns.cloudflare.com)
  • IP Addresses: 104.16.253.120, 104.16.254.120 (Cloudflare CDN)
  • IPv6: 2606:4700::6810:fd78, 2606:4700::6810:fe78
  • Mail: Google Workspace (aspmx.l.google.comand alternates)
  • DNSSEC: Not signed

Same first word

python-guide.org
python-guide.readthedocs.io

DNS History

5 records (4 active, 1 former)

2020202120222023202420252026A104.16.253.120104.16.254.1202606:4700::6810:fd782606:4700::6810:fe78137.116.78.48
●A104.16.253.1202026-03-23 → 2026-06-21 · 3 obs
○ 2019-04-07 18:51:28
● 2026-03-23 20:02:40
● 2026-06-21 21:20:00
●A104.16.254.1202026-03-23 → 2026-06-21 · 3 obs
○ 2019-04-07 18:51:28
● 2026-03-23 20:02:40
● 2026-06-21 21:20:00
○A137.116.78.482019-04-07 → 2019-04-07 · 3 obs
● 2019-04-07 18:51:28
○ 2026-03-23 20:02:40
○ 2026-06-21 21:20:00
●A2606:4700::6810:fd782026-03-23 → 2026-06-21 · 3 obs
○ 2019-04-07 18:51:28
● 2026-03-23 20:02:40
● 2026-06-21 21:20:00
●A2606:4700::6810:fe782026-03-23 → 2026-06-21 · 3 obs
○ 2019-04-07 18:51:28
● 2026-03-23 20:02:40
● 2026-06-21 21:20:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ioa2.nic.io, a0.nic.io, c0.nic.io, b0.nic.io-
readthedocs.ioivan.ns.cloudflare.com, tegan.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.226

NS records: ivan.ns.cloudflare.com, tegan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for readthedocs.io (unsigned zone)

⏱️ Timing

Total: 285ms | Queries: -

📄 Records

TypeCountSample Data
A2104.16.253.120, 104.16.254.120
AAAA22606:4700::6810:fe78, 2606:4700::6810:fd78
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

python-guide.readthedocs.io points to the four IP addresses 104.16.253.120, 104.16.254.120, 2606:4700::6810:fd78 and 2606:4700::6810:fe78.

Additional host names — koalix-crm.readthedocs.io, heist.readthedocs.io, pythran.readthedocs.io and two others — share IP numbers with python-guide.readthedocs.io.