How does PageSourceSearch know what hobbymonitor.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 hobbymonitor.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 hobbymonitor.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 hobbymonitor.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

hobbymonitor.com

Built with dompurify 3.4.12, firebase 12.19.0, addsearch-search-ui 0.10.9, tarteaucitronjs 1.35.1, posthog-js 1.434.12, @marimo-team/frontend 0.25.0, swagger-ui-dist 5.33.0, @inkeep/cxkit-js 0.5.119, @feathery/react 2.96.0, recaptcha, @reachfive/identity-ui 2.1.0, @govtechsg/sgds-web-component 3.28.0 and more. 6 pages and 146 stored files, last crawled 2026-10-02.

rank 283,784 32 libraries 1 identifier 27 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
dompurify	3.4.12	2026-10-02
firebase	12.19.0	2026-10-02
addsearch-search-ui	0.10.9	2026-10-02
tarteaucitronjs	1.35.1	2026-10-02
posthog-js	1.434.12	2026-10-02
@marimo-team/frontend	0.25.0	2026-10-02
swagger-ui-dist	5.33.0	2026-10-02
@inkeep/cxkit-js	0.5.119	2026-10-02
@feathery/react	2.96.0	2026-10-02
recaptcha		2026-10-02
@reachfive/identity-ui	2.1.0	2026-10-02
@govtechsg/sgds-web-component	3.28.0	2026-10-02
kore-web-sdk	11.28.1	2026-10-02
@cognigy/webchat	3.50.0	2026-10-02
google-apis		2026-10-02
cloudflare-insights		2026-10-02
@usesuperflow/toolbar	1.0.201	2026-10-02
cloudflare-rocket-loader		2026-10-02
@desivocal/agents-cdn	1.0.21	2026-10-02
@moveo-ai/web-client	0.117.0	2026-10-02
artalk	2.10.0	2026-10-02
antdv-next	1.5.4	2026-10-02
holidoit	1.0.163	2026-10-02
mori-chat-widget	2.0.49	2026-10-02
@animuz/embed	0.2.9	2026-10-02
@inkeep/agents-ui-js-cloud	0.17.8	2026-10-02
@luizleon/sf.prefeiturasp.chat-gateway-ui	0.1.19	2026-10-02
tia-gpc-widget	3.1.1	2026-10-02
@percy.ai/hvs-funnel-overlay	0.5.13	2026-10-02
@percy.ai/your-team	1.1.10	2026-10-02
@wix/design-system	1.328.0	2026-09-24
@tolgee/web	7.2.1	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
AdSense publisher id (Google)	ca-pub-1880050878425775	view source

Third-party hosts

Hosts outside hobbymonitor.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
apis.google.com	connect	view source
app.posthog.com	connect	view source
apps.apple.com	connect	view source
bowmystery.com	connect	view source
epnt.ebay.com	connect	view source
firebase.google.com	connect	view source
fonts.googleapis.com	stylesheet connect	view source
fonts.gstatic.com	connect	view source
pagead2.googlesyndication.com	connect	view source
play.google.com	connect	view source
reactjs.org	connect	view source
schema.org	connect	view source
sentry.io	connect	view source
static.cloudflareinsights.com	script	view source
thetoppscompany.sjv.io	connect	view source
toolbox.marketingtools.apple.com	connect	view source
us-assets.i.posthog.com	script	view source
us.i.posthog.com	connect	view source
us.posthog.com	connect	view source
www.aboutads.info	connect	view source
www.ebay.com	connect	view source
www.google.com	connect	view source
www.googletagmanager.com	connect	view source
www.instagram.com	connect	view source
www.tiktok.com	connect	view source
www.w3.org	connect	view source
yandex.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 146) }. 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://apis.google.com/js/api.js	js library	not fetched	2026-10-02	current
https://static.cloudflareinsights.com/beacon.min…85bb4c19e7a9bdbcba1788362987495	js library	not fetched	2026-10-02	current
https://www.google.com/recaptcha/api.js	js library	not fetched	2026-10-02	current
https://www.google.com/recaptcha/enterprise.js?render=	js library	not fetched	2026-10-02	current
https://www.hobbymonitor.com/assets/gallery-DoFl6-ow.js	js	16.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/notifications-C4PBTDR2.js	js	6.3 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/desktop-BmG9LCAc.js	js	9.9 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/deals-DF-zEsgQ.js	js	14.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/member-detail-CspuA_Kv.js	js	9.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_slug_-BC4JEBTs.js	js	15 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/index-fM7pHEuf.js	js	8.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/rankings-oarAW8hL.js	js	6.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/index-CPwj8CGF.js	js	4.7 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/index-DeyPjzKG.js	js	5.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/indices-BMCxOhxn.js	js	6.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/break-calculator-CMROPjRx.js	js	16.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/wax-CJNZ1llc.js	js	6.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_slug_-WgKVLEGh.js	js	11.8 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/breaks-DAGODRJ4.js	js	4.8 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/article-GvErdLPo.js	js	384 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/category-BderMo8t.js	js	5.8 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/index-BusXSlUj.js	js	4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/market-index-CoYWF4C3.js	js	14.5 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/discover-BoPZ5_oM.js	js	4.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/landing-BbfaWhxp.js	js	5.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/alumni-CFJOVo64.js	js	9.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/product-dashboard-BbrXuU3t.js	js	17.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_id_-D17OzW4m.js	js	67.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/prospects-DRtBHYup.js	js	53.5 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/not-found-wzUK_DgR.js	js	1.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/connect-4KC-RHjP.js	js	11 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/signup-Cb8mfLdR.js	js	1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/welcome-DGpHqDH0.js	js	4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/ProfilePage-BWMaxRXa.js	js	30.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_slug_-BqAhaC2p.js	js	48.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/MobileCancelPage-aJjLn6UF.js	js	2.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/MobileSuccessPage-BWC_Az2n.js	js	2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_slug_-D4SosmxK.js	js	33.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/Blog-BUE-hJPR.js	js	9.9 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/insights-BGmLsc1w.js	js	8.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/news-BtYvz6Cu.js	js	7.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/feedback-DBeietJ8.js	js	4.3 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/giveaway-terms-OORuHLPE.js	js	6.9 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/terms-Bq_iarsi.js	js	31 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/privacy-Be3uDI0Y.js	js	31 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/price-tool-X3FInEuE.js	js	12.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/tracker-DIXNm-oI.js	js	28.5 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/bowman-K5XX5kbX.js	js	16.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/card-grading-ai-CxzfMUq7.js	js	23 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/scanner-v2-ERV3VU0d.js	js	15.8 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_scanId_-WDda9Rab.js	js	28.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/scanner-JsXeSU3t.js	js	52.5 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/_id_-DeKwJE0j.js	js	44.9 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/perf-plus-CacHlje8.js	js	11.3 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/date-vendor-C1FJ4ShR.js	js	21.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/skeleton-Chifzod1.js	js	212 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/use-debounce-Dppdem_L.js	js	199 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/ebay-smart-placements-DhmFFIiv.js	js	3.9 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/releases-DNn9U9Pk.js	js	21.6 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/VideoDemo-ByxD1CPx.js	js	5.9 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/AdManager-a1FJR3wn.js	js	482 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/StatsSection-Bbs3iMik.js	js	2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/badge-Td4mzEzu.js	js	786 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/about-CntQolGe.js	js	28.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/controls-DliRnrxW.js	js	2.5 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/subscription-manage-HIX3-mwE.js	js	831 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/useSubscriptionStatus-DRl3JL4b.js	js	352 B	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/pricing-SSrXrZQb.js	js	27.8 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/form-vendor-CujXulA7.js	js	27 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/icon-vendor-oFTUSuKF.js	js	489.7 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/ui-vendor-DMIqSPrK.js	js	276.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/firebase-vendor-CX_xv3XA.js	js	165.8 KB	2026-10-02	current
https://www.hobbymonitor.com/assets/query-vendor-oX4S9fKB.js	js	55.4 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/index-I0rfwnEW.js	js	444.5 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/cdn-cgi/scripts/7d0…/rocket-loader.min.js	js	12 KB	2026-10-02	current
https://www.hobbymonitor.com/releases	html	248.2 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/about	html	76.2 KB	2026-10-02	2026-10-02
https://shop.hobbymonitor.com/	html	44.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/pricing	html	106.1 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/	html	196.3 KB	2026-10-02	2026-10-02
https://www.hobbymonitor.com/assets/gallery-iCfQ7Oox.js	js	16.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/notifications-CKZmLNsu.js	js	6.4 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/desktop-CNhCv8Ha.js	js	9.9 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/deals-CFAifvOC.js	js	13.2 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/member-detail-BJpXGeeK.js	js	9.5 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_slug_-mxnsmOug.js	js	18.7 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/index-DQRFKiNo.js	js	5.9 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/index-CZpwQCws.js	js	4.2 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/rankings-DkYwvKFF.js	js	5.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/index-Djgvp8yW.js	js	3.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/indices-DqAeXrrW.js	js	7 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/break-calculator-C92GvBHr.js	js	14.9 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/wax-DSqj0oT8.js	js	9.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_slug_-BWQvdbrl.js	js	13.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/breaks-PPy96pkm.js	js	7 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/article-DGRK6Dg_.js	js	417 B	2026-09-24	current
https://www.hobbymonitor.com/assets/category-DsdXcTrb.js	js	5.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/index-DsOFl4SQ.js	js	4.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/market-index-luTgWyGg.js	js	15.4 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/discover-Dws0uwTt.js	js	4.6 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/landing-DVOTt3om.js	js	5.6 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/alumni-Bj8_posD.js	js	9.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/product-dashboard-xfWn1MTP.js	js	23.6 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_id_-D9axGwq3.js	js	67.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/prospects-BzG7vXt9.js	js	56.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/not-found-BGF4zDNN.js	js	1.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/connect-DkHc-P8s.js	js	11.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/signup-Bt7bgp0r.js	js	1.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/welcome-Cvr1xRMi.js	js	4.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/ProfilePage-nzVCF5yY.js	js	30.5 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_slug_-CH9onobb.js	js	48.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/MobileCancelPage-TdWuyYj-.js	js	2.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/MobileSuccessPage-DtISpVMU.js	js	2.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_slug_-dco4pZ9M.js	js	33.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/Blog-BqgpCIX6.js	js	9.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/insights-jpTGvEjM.js	js	7.9 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/news-D7b6ntBu.js	js	7 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/feedback-DqBkTEC5.js	js	4.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/giveaway-terms-jiShcSuN.js	js	6.9 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/terms-DyjNklve.js	js	29.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/privacy--5zdVWI2.js	js	24.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/tracker-DzZ468l1.js	js	28.4 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/bowman-Ch5o9wyg.js	js	19 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/card-grading-ai-C9WTsIs4.js	js	23 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_scanId_-Deeraage.js	js	28.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/scanner-AxPKLMFH.js	js	52.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/_id_-BRa7gHpm.js	js	41.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/perf-plus-BRK6KmJx.js	js	11.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/release-date-B3XAMuxF.js	js	1.2 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/use-debounce-DWyuvpWY.js	js	199 B	2026-09-24	current
https://www.hobbymonitor.com/assets/EbayAffiliateDisclosure-9DG4t62q.js	js	305 B	2026-09-24	current
https://www.hobbymonitor.com/assets/ebay-smart-placements-BT_2ubAy.js	js	3.3 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/releases-DuVTHitX.js	js	18.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/VideoDemo-QIVWLHIC.js	js	5.9 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/StatsSection-CWMGiKbi.js	js	2 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/plans-BWP4Ig8g.js	js	1.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/useSubscriptionStatus-ZAqxCTKe.js	js	351 B	2026-09-24	current
https://www.hobbymonitor.com/assets/AdManager-Vkgcpsyt.js	js	469 B	2026-09-24	current
https://www.hobbymonitor.com/assets/about-DZHFvmP1.js	js	47.1 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/date-vendor-CXQvy03X.js	js	21.2 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/form-vendor-BbpM4sBQ.js	js	27 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/icon-vendor-BVA9AJ-N.js	js	489.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/ui-vendor-BNlO3lKu.js	js	276.2 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/index-Ww_mg2y_.js	js	529.8 KB	2026-09-24	current
https://www.hobbymonitor.com/assets/query-vendor-DZMRrbMU.js	js	51.5 KB	2026-09-24	current
https://www.hobbymonitor.com/login	html	296 KB	2026-09-24	current

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, 80 files, 3 MB; 30 libraries, 1 identifier, 27 third-party hosts
30 libraries added
- cloudflare-rocket-loader
- tarteaucitronjs 1.35.1
- posthog-js 1.434.12
- mori-chat-widget 2.0.49
- @feathery/react 2.96.0
- @percy.ai/hvs-funnel-overlay 0.5.13
- @percy.ai/your-team 1.1.10
- firebase 12.19.0
- @usesuperflow/toolbar 1.0.201
- tia-gpc-widget 3.1.1
- @cognigy/webchat 3.50.0
- swagger-ui-dist 5.33.0
- and 18 more
1 identifier added
- ca-pub-1880050878425775 AdSense publisher id
28 third-party hosts added
- us-assets.i.posthog.com
- static.cloudflareinsights.com
- fonts.googleapis.com
- www.w3.org
- yandex.com
- sentry.io
- app.posthog.com
- us.i.posthog.com
- us.posthog.com
- www.instagram.com
- www.tiktok.com
- schema.org
- and 16 more
80 files added

Questions about hobbymonitor.com

How does PageSourceSearch know what hobbymonitor.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 hobbymonitor.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 hobbymonitor.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 hobbymonitor.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.