How does PageSourceSearch know what expertflyer.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 expertflyer.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 expertflyer.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 expertflyer.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

expertflyer.com

Built with gtm, @clerk/ui 1.34.0, lottie-web 5.13.0, @amplitude/amplitude-js-gtm 3.25.0, @blotoutio/providers-blotout-consent-sdk 1.73.0, dashjs 5.2.1, onetrust, facebook-pixel, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1, kore-web-sdk 11.28.1 and more. 5 pages and 137 stored files, last crawled 2026-10-02.

rank 624,797 36 libraries 0 identifiers 34 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		2026-10-02
@clerk/ui	1.34.0	2026-10-02
lottie-web	5.13.0	2026-10-02
@amplitude/amplitude-js-gtm	3.25.0	2026-10-02
@blotoutio/providers-blotout-consent-sdk	1.73.0	2026-10-02
dashjs	5.2.1	2026-10-02
onetrust		2026-10-02
facebook-pixel		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
kore-web-sdk	11.28.1	2026-10-02
face-age	2.4.6	2026-10-02
@meowwolf/meowwolf-main	1.5.4	2026-10-02
@moveo-ai/web-client	0.117.0	2026-10-02
html2pdf.js	0.14.0	2026-10-02
fusioncharts	4.2.2	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
@johanaarstein/dotlottie-player	1.5.23	2026-10-02
@feedmepos/mf-inventory-portal	1.7.17	2026-10-02
@betterbugs/web-sdk	0.0.47	2026-10-02
@ant-design/x	2.9.0	2026-10-02
chobitsu	1.8.6	2026-10-02
@tsocial/tvweb-sdk	5.38.6	2026-10-02
@everymatrix/player-profile-dashboard	1.21.0	2026-10-02
@okta/okta-signin-widget	7.49.1	2026-10-02
@inkeep/agents-ui-js-cloud	0.17.8	2026-10-02
@joyfill/components	4.0.0-rc26	2026-10-02
veris-storybook-beta	0.1.81-react-upgrade	2026-10-02
html2canvas	1.4.1	2026-09-24
@lottiefiles/lottie-player	2.0.12	2026-09-24
@inkeep/cxkit-js	0.5.119	2026-09-24
@feathery/react	2.96.0	2026-09-24
spectorjs	0.9.33	2026-09-24

Tracking, tag and verification IDs

No analytics property, tag manager container, pixel or site-verification token was found in the stored source.

Third-party hosts

Hosts outside expertflyer.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-sr.amplitude.com	connect	view source
api-sr.eu.amplitude.com	connect	view source
api-sr.stag2.amplitude.com	connect	view source
api.eu.amplitude.com	connect	view source
api.lab.amplitude.com	connect	view source
api.lab.eu.amplitude.com	connect	view source
api.sanity.io	connect	view source
api2.amplitude.com	connect	view source
app.amplitude.com	connect	view source
app.eu.amplitude.com	connect	view source
apps.stag2.amplitude.com	connect	view source
cdn.amplitude.com	connect	view source
cdn.cohesionapps.com	connect	view source
connect.facebook.net	connect	view source
diagnostics.prod.eu-central-1.amplitude.com	connect	view source
diagnostics.prod.us-west-2.amplitude.com	connect	view source
example.com	connect	view source
flag.lab.amplitude.com	connect	view source
flag.lab.eu.amplitude.com	connect	view source
github.com	connect	view source
images.kiwi.com	connect	view source
purecatamphetamine.github.io	connect	view source
react.dev	connect	view source
sanity.io	connect	view source
schemas.openid.net	connect	view source
sr-client-cfg.amplitude.com	connect	view source
sr-client-cfg.eu.amplitude.com	connect	view source
www.facebook.com	connect	view source
www.flyertalk.com	connect	view source
www.googletagmanager.com	connect	view source
www.instagram.com	connect	view source
www.sanity.io	connect	view source
www.w3.org	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 137) }. 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://cdn.cookielaw.org/scripttemplates/otSDKStub.js	js library	not fetched	2026-10-02	current
https://connect.facebook.net/en_US/fbevents.js	js library	not fetched	2026-10-02	2026-10-02
https://www.expertflyer.com/_next/static/chunks/8899.7c5fc94795a7caed.js	js	358.8 KB	2026-10-02	current
https://www.googletagmanager.com/gtm.js?id=GTM-54R5DVSN	js library	not fetched	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/8059.e90c7cedb13b5f8d.js	js	73 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/7645.0cdb136872b84511.js	js	26.4 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/7335.e253cfbaff373d47.js	js	3.1 KB	2026-10-02	2026-10-02
https://www.expertflyer.com/_next/static/chunks/6671.a2b338db916db79f.js	js	7 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/6129.e6cd85ccebb5ea7a.js	js	36.6 KB	2026-10-02	current
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https://www.expertflyer.com/_next/static/chunks/2317.4d0ce026095acf79.js	js	24.3 KB	2026-10-02	2026-10-02
https://www.expertflyer.com/_next/static/chunks/3935.816e5652c6cd00d3.js	js	19.4 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/1285.b2c2e94cda62e36c.js	js	649 B	2026-10-02	current
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https://www.expertflyer.com/_next/static/chunks/1021.460edbaf7e8c487e.js	js	11.7 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/498.e31e6e24f94b0078.js	js	621 B	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/378e5a93.c87b8db9e44f75fc.js	js	119.6 KB	2026-10-02	current
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https://www.expertflyer.com/_next/static/chunks/1086-3b1d3ff8e6702747.js	js	63.2 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/4471-ec7aab2f38785e40.js	js	8.5 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/47bf8baf-1d2ca53e529fd3ab.js	js	298.2 KB	2026-10-02	current
https://www.expertflyer.com/_next/static/chunks/8863-38b22d7666da865d.js	js	21.7 KB	2026-10-02	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, 84 files, 6.5 MB; 31 libraries, 0 identifiers, 34 third-party hosts
31 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
- @moveo-ai/web-client 0.117.0
- @blotoutio/providers-blotout-consent-sdk 1.73.0
- @okta/okta-signin-widget 7.49.1
- @tsocial/tvweb-sdk 5.38.6
- kore-web-sdk 11.28.1
- @reachfive/identity-ui 2.1.0
- @amplitude/amplitude-js-gtm 3.25.0
- jspdf 4.2.1
- and 19 more
34 third-party hosts added
84 files added

Questions about expertflyer.com

How does PageSourceSearch know what expertflyer.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 expertflyer.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 expertflyer.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 expertflyer.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.