How does PageSourceSearch know what der-birkenhof.de is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of der-birkenhof.de go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from der-birkenhof.de?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as der-birkenhof.de?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

der-birkenhof.de

Built with gtm, facebook-pixel, @vitest/utils 5.0.2. 5 pages and 5 stored files, last crawled 2026-10-06.

rank 11,843,891 3 libraries 5 identifiers 0 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
gtm		2026-10-06
facebook-pixel		2026-10-06
@vitest/utils	5.0.2	2026-10-06

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
Bing site verification (Microsoft)	F71F0480CE3A69926C7A89E7EA092EDC	view source
Meta pixel id (Meta)	768149021961236	view source
Google site verification (Google)	xRLDyUibUJiA_Uxpwk-IATsjHvo_Zj-7Pz87n8pUWRk	view source
Google Tag Manager container (Google)	GTM-5C65V325	view source
Matomo site id (Matomo)	analytics.e-ventis.eu#76	view source

Third-party hosts

The stored pages and scripts reference no host outside der-birkenhof.de.

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 5) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://www.der-birkenhof.de/de/der-birkenhof.html	html	210.8 KB	2026-10-06	2026-10-06
https://www.der-birkenhof.de/de/der-birkenhof/das-hotel.html	html	208.6 KB	2026-10-06	2026-10-06
https://www.der-birkenhof.de/de/preise-angebote/…/last-minute-angebote.html	html	207.9 KB	2026-10-06	2026-10-06
https://www.der-birkenhof.de/	html	308 KB	2026-10-06	2026-10-06
https://www.der-birkenhof.de/de/kontakt-anfrage/kontakt/anfrage.html	html	290 KB	2026-10-06	2026-10-06

Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-06 first crawl

5 pages, 5 files, 1.2 MB; 3 libraries, 5 identifiers, 0 third-party hosts
3 libraries added
- @vitest/utils 5.0.2
- gtm
- facebook-pixel
5 identifiers added
- GTM-5C65V325 Google Tag Manager container
- 768149021961236 Meta pixel id
- xRLDyUibUJiA_Uxpwk-IATsjHvo_Zj-7Pz87n8pUWRk Google site verification
- F71F0480CE3A69926C7A89E7EA092EDC Bing site verification
- analytics.e-ventis.eu#76 Matomo site id
5 files added

Questions about der-birkenhof.de

How does PageSourceSearch know what der-birkenhof.de is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of der-birkenhof.de go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from der-birkenhof.de?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as der-birkenhof.de?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.