indexo.dev

arc42.org

.org crawl

First seen 2026-04-14 · Last seen 2026-05-11 · ok HTTP/1.1 200 571 ms crawled 2026-05-07

US · 104.198.14.52 · AS396982 Google LLC

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
arc42 - arc42
Description
All you ever need to construct, communicate and document your software architecture. Proven, practical and pragmatic. Free and open source, takes the pain out of documentation.
Language
en
Canonical
https://arc42.org/
Feeds

Open Graph

url
https://arc42.org/
title
arc42
locale
en
site name
arc42
description
All you ever need to construct, communicate and document your software architecture. Proven, practical and pragmatic. Free and open source, takes the pain out of documentation.

Technology

CDN
Netlify
Analytics
  • Plausible

Third-party hosts loaded (3)

  • it-and-more.blogspot.com×1
  • plausible.io×1
  • unpkg.com×1

Social

Registration

Registrar
Mesh Digital Limited
Created
2011-12-07
Expires
2026-12-07 202 days left
Updated
2025-12-11
Name servers
  • ns29.domaincontrol.com
  • ns30.domaincontrol.com

DNS records live

NS
  • ns29.domaincontrol.com
  • ns30.domaincontrol.com
MX
  • 50 mail.arc42.org
TXT
  • google-site-verification=4Mqb_RuALLVctHil16kxEzLmsVzmxgoj5konaOiSdS0

Email authentication weak

SPF
v=spf1 include:spf.mailjet.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-03-11 to 2026-06-09
Expires in 21 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://arc42.org/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=31536000

Links to (9)

Linked from (2)