How does PageSourceSearch know what letterhead-site.netlify.app 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 letterhead-site.netlify.app 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 letterhead-site.netlify.app?

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 letterhead-site.netlify.app?

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

letterhead-site.netlify.app

Built with gtm, gtag, hotjar, hubspot, @vitest/utils 5.0.2. 5 pages and 8 stored files, last crawled 2026-10-03.

5 libraries 5 identifiers 6 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		2026-10-03
gtag		2026-10-03
hotjar		2026-10-03
hubspot		2026-10-03
@vitest/utils	5.0.2	2026-10-03

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
Google Analytics 4 measurement id (Google)	G-NWVJNDTY28	view source
Google Tag Manager container (Google)	GTM-P8Q6PZ5	view source
Google Tag Manager container (Google)	GTM-PGGG5GG8	view source
Hotjar site id (Hotjar)	2410348	view source
HubSpot portal id (HubSpot)	8719206	view source

Third-party hosts

Hosts outside letterhead-site.netlify.app 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
app.termly.io	script	view source
cdn.pixel.zymplify.com	script	view source
ds360.co	script	view source
fonts.googleapis.com	stylesheet	view source
js.hs-scripts.com	script	view source
www.googletagmanager.com	script iframe	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 8) }. 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://js.hs-scripts.com/8719206.js	js library	not fetched	2026-10-03	2026-10-03
https://letterhead-site.netlify.app/assets/site.js?v=95569f9a27	js	32 KB	2026-10-03	2026-10-03
https://www.googletagmanager.com/gtag/js?id=G-NWVJNDTY28	js library	not fetched	2026-10-03	2026-10-03
https://letterhead-site.netlify.app/contact.html	html	54.4 KB	2026-10-03	2026-10-03
https://letterhead-site.netlify.app/about.html	html	59.5 KB	2026-10-03	2026-10-03
https://letterhead-site.netlify.app/studio-pricing.html	html	70.2 KB	2026-10-03	2026-10-03
https://letterhead-site.netlify.app/	html	72.2 KB	2026-10-03	2026-10-03
https://letterhead-site.netlify.app/blog/	html	105.2 KB	2026-10-03	2026-10-03

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.

2026-10-03 first crawl

5 pages, 8 files, 393.5 KB; 5 libraries, 5 identifiers, 6 third-party hosts
5 libraries added
- gtag
- gtm
- @vitest/utils 5.0.2
- hotjar
- hubspot
5 identifiers added
- G-NWVJNDTY28 Google Analytics 4 measurement id
- GTM-P8Q6PZ5 Google Tag Manager container
- 2410348 Hotjar site id
- GTM-PGGG5GG8 Google Tag Manager container
- 8719206 HubSpot portal id
7 third-party hosts added
8 files added

Questions about letterhead-site.netlify.app

How does PageSourceSearch know what letterhead-site.netlify.app 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 letterhead-site.netlify.app 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 letterhead-site.netlify.app?: 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 letterhead-site.netlify.app?: 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.