What powers lettern.de?

Last seen Sep 2026 · 5 technologies across 4 categories

Operating systems

UNIX
since May 2020

Programming languages

PHP v4.4.8
since May 2020

Web server extensions

mod_ssl v2.8.30
since May 2020
OpenSSL v1.0.2a
since May 2020

Web servers

Apache HTTP Server v1.3.39
since May 2020

AI Crawlers

No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.

  • robots.txt not found
  • llms.txt not found
  • ai.txt not found

See who blocks each AI crawler across the web

AI Crawlers

No robots.txt, all AI crawlers allowed

Full breakdown

Open Page Rank

2.48 / 10 · ranked #2,536,000 of all domains

24 referring domains · OpenPageRank

Infrastructure

DNS records as swept Oct 2026. How the web is hosted

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