How does PageSourceSearch know what flatironschool.com 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 flatironschool.com 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 flatironschool.com?

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 flatironschool.com?

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

flatironschool.com

Built with @clerk/ui 1.34.0, @blotoutio/providers-blotout-consent-sdk 1.73.0, dashjs 5.2.1, @feathery/react 2.96.0, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1, ovenplayer 0.10.54, graphql-playground-react 1.7.28, @recogito/annotorious 2.7.14, @ant-design/x 2.9.0, @pierre/diffs 1.5.1 and more. 5 pages and 174 stored files, last crawled 2026-10-02.

rank 419,489 20 libraries 2 identifiers 20 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
@clerk/ui	1.34.0	2026-10-02
@blotoutio/providers-blotout-consent-sdk	1.73.0	2026-10-02
dashjs	5.2.1	2026-10-02
@feathery/react	2.96.0	2026-10-02
@reachfive/identity-core	1.42.0	2026-10-02
@reachfive/identity-ui	2.1.0	2026-10-02
jspdf	4.2.1	2026-10-02
ovenplayer	0.10.54	2026-10-02
graphql-playground-react	1.7.28	2026-10-02
@recogito/annotorious	2.7.14	2026-10-02
@ant-design/x	2.9.0	2026-10-02
@pierre/diffs	1.5.1	2026-10-02
@inkeep/agents-ui-js-cloud	0.17.8	2026-10-02
@waniwani/sdk	0.21.3	2026-10-02
@joyfill/components	4.0.0-rc26	2026-10-02
@pydantic/ai-chat-ui	2.3.0	2026-10-02
@eka-care/medassist-widget	0.1.131	2026-09-24
spectorjs	0.9.33	2026-09-24
@moveo-ai/web-client	0.117.0	2026-09-24
@shikijs/langs	4.4.3	2026-09-24

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
Crisp website id (Crisp)	34bcda7f-9a8b-4ed8-bf37-344ccd6b307b	view source
Segment write key (Twilio Segment)	d20aefd2d0a1b8192909	view source

Third-party hosts

Hosts outside flatironschool.com 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
acme.com	connect	view source
api.perplexity.ai	connect	view source
api.sanity.io	connect	view source
app.verow.io	connect	view source
cdp.customer.io	connect	view source
client.crisp.chat	connect	view source
dashscope.aliyuncs.com	connect	view source
flatiron-school-snippets.s3.us-east-1.amazonaws.com	connect	view source
flatironschoolforms.formstack.com	connect	view source
github.com	connect	view source
instagram.com	connect	view source
linkedin.com	connect	view source
react.dev	connect	view source
sanity.io	connect	view source
stega.invalid	connect	view source
va.vercel-scripts.com	connect	view source
vercel.live	connect	view source
www.sanity.io	connect	view source
www.w3.org	connect	view source
youtube.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 174) }. 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
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https://flatironschool.com/_next/static/chunks/9934.4420b54cb6c8c48f.js	js	26.4 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9754.1b9710ef3af039df.js	js	30.3 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9686.89704acefc101fc4.js	js	3.6 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9644.85fb5b1cd857d436.js	js	22.2 KB	2026-10-02	current
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https://flatironschool.com/_next/static/chunks/9547.6a113cb8b945e4d0.js	js	19.7 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9396.97d12bff7c86a5ea.js	js	23 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9338.aae68c93e698cfff.js	js	24.9 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9157.b63d5f2ddbcd1faa.js	js	8.7 KB	2026-10-02	current
https://flatironschool.com/_next/static/chunks/9237.fd07ca7ad4102ef5.js	js	9 KB	2026-10-02	current
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https://flatironschool.com/apply	html	37.8 KB	2026-10-02	2026-10-02
https://flatironschool.com/contact	html	49.9 KB	2026-10-02	2026-10-02
https://flatironschool.com/about	html	57.3 KB	2026-10-02	2026-10-02
https://flatironschool.com/blog	html	88.7 KB	2026-10-02	2026-10-02
https://flatironschool.com/	html	126.9 KB	2026-10-02	2026-10-02
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https://flatironschool.com/_next/static/2QVzp-vHn5_ywblFX7LMA/_buildManifest.js	js	1.5 KB	2026-09-24	current
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https://flatironschool.com/_next/static/chunks/5…pl_4FESbynP4CWtPRNg41nU56Ao5zXA	js	61.8 KB	2026-09-24	current
https://flatironschool.com/_next/static/chunks/m…pl_4FESbynP4CWtPRNg41nU56Ao5zXA	js	528 B	2026-09-24	current
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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, 156 files, 6.5 MB; 16 libraries, 2 identifiers, 20 third-party hosts
16 libraries added
- @inkeep/agents-ui-js-cloud 0.17.8
- @clerk/ui 1.34.0
- @ant-design/x 2.9.0
- @joyfill/components 4.0.0-rc26
- @feathery/react 2.96.0
- @blotoutio/providers-blotout-consent-sdk 1.73.0
- jspdf 4.2.1
- @reachfive/identity-core 1.42.0
- @reachfive/identity-ui 2.1.0
- ovenplayer 0.10.54
- @recogito/annotorious 2.7.14
- dashjs 5.2.1
- and 4 more
2 identifiers added
- d20aefd2d0a1b8192909 Segment write key
- 34bcda7f-9a8b-4ed8-bf37-344ccd6b307b Crisp website id
20 third-party hosts added
156 files added

Questions about flatironschool.com

How does PageSourceSearch know what flatironschool.com 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 flatironschool.com 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 flatironschool.com?: 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 flatironschool.com?: 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.