How does PageSourceSearch know what cbkrotterdam.nl 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 cbkrotterdam.nl 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 cbkrotterdam.nl?

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 cbkrotterdam.nl?

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

cbkrotterdam.nl

Built with gtag. 5 pages and 9 stored files, last crawled 2026-10-02.

rank 1,035,163 1 library 4 identifiers 4 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
gtag		2026-10-02

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)	34E0D5A4EE213B991363A54141CE3F2F	view source
Google Analytics 4 measurement id (Google)	G-GX817XTP1Z	view source
Google site verification (Google)	5GqYsNubLXZcpM73vqCTzirLupHjNN5J5uy56MSx4Rc	view source
Yandex site verification (Yandex)	6f4cc5061f0266a2	view source

Third-party hosts

Hosts outside cbkrotterdam.nl that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
cdn1.readspeaker.com	script	view source
subscribe.mailinglijst.nl	connect	view source
translate.google.com	connect	view source
www.googletagmanager.com	script	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 9) }. 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.cbkrotterdam.nl/app/plugins/gtransla…a7203e579157a8ce8e687982f112eb7	js	12.5 KB	2026-10-02	current
https://www.cbkrotterdam.nl/app/themes/pms72-cbk…/js/index.js?ver=1768488309	js	46 KB	2026-10-02	current
https://www.googletagmanager.com/gtag/js?id=G-GX817XTP1Z	js library	not fetched	2026-10-02	current
https://www.cbkrotterdam.nl/actueel/	html	62.2 KB	2026-10-02	2026-10-02
https://www.cbkrotterdam.nl/app/plugins/cookie-notice/js/front.min.js?ver=2.4.18	js	8.5 KB	2026-10-02	current
https://www.cbkrotterdam.nl/jaaroverzicht/	html	64.3 KB	2026-10-02	2026-10-02
https://www.cbkrotterdam.nl/organisatie/	html	68.4 KB	2026-10-02	2026-10-02
https://www.cbkrotterdam.nl/over/	html	74.5 KB	2026-10-02	2026-10-02
https://www.cbkrotterdam.nl/	html	64.5 KB	2026-10-02	2026-10-02

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.

2026-10-02 first crawl

5 pages, 9 files, 400.9 KB; 1 library, 4 identifiers, 4 third-party hosts
1 library added
- gtag
4 identifiers added
- G-GX817XTP1Z Google Analytics 4 measurement id
- 5GqYsNubLXZcpM73vqCTzirLupHjNN5J5uy56MSx4Rc Google site verification
- 34E0D5A4EE213B991363A54141CE3F2F Bing site verification
- 6f4cc5061f0266a2 Yandex site verification
4 third-party hosts added
9 files added

Questions about cbkrotterdam.nl

How does PageSourceSearch know what cbkrotterdam.nl 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 cbkrotterdam.nl 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 cbkrotterdam.nl?: 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 cbkrotterdam.nl?: 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.