42blue.com

.com crawl

First seen 2026-04-13 · Last seen 2026-05-20 · ok HTTP/1.1 200 187 ms crawled 2026-05-07

DE · 195.201.96.68 · AS24940 Hetzner Online GmbH

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: Hello! I am Matthias a technical SEO and Developer - 42BLUE
Description: Search Engine Optimization, Technical SEO, Frontend Web Development, Backend Web Development, Web Scraping, Page Speed, Shopify Development

Technology

Server: nginx

Social

DNS records live

NS

ns.udag.de
ns.udag.net
ns.udag.org

MX

10 mx00.udag.de
20 mx01.udag.de

Email authentication partial

SPF: v=spf1 include:_smtp.udag.de ~all
softfail (~all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

E8

from 2026-03-23 to 2026-06-21

Expires in 31 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://42blue.com/

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=63072000

Links to (5)

Linked from (3)