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Websites by third-party host

Every script, frame and stylesheet a page loads from another host, and every absolute URL a site's own scripts call, names a dependency. Look up a host to see every site in the index that loads from it, or browse the most loaded hosts.

Most loaded hosts

#HostSites
1www.w3.org1,110,504
2fonts.googleapis.com940,537
3www.googletagmanager.com781,203
4www.youtube.com628,433
5github.com507,907
6www.google.com438,050
7player.vimeo.com415,105
8www.facebook.com340,283
9cdnjs.cloudflare.com327,400
10cdn.jsdelivr.net320,831
11static.cloudflareinsights.com290,437
12twitter.com272,365
13www.youtube-nocookie.com253,964
14img.youtube.com231,067
15ajax.googleapis.com224,940
16connect.facebook.net206,734
17vimeo.com185,467
18reactjs.org171,852
19react.dev163,787
20use.typekit.net143,718
21www.linkedin.com132,283
22www.pinterest.com124,371
23pagead2.googlesyndication.com115,287
24d3e54v103j8qbb.cloudfront.net101,771
25code.jquery.com98,038
26maps.googleapis.com96,871
27unpkg.com91,023
28apis.google.com84,468
29maps.google.com84,463
30cdn.prod.website-files.com78,791
31schema.org78,260
32wa.me74,518
33platform.twitter.com74,002
34go.elementor.com73,916
35www.instagram.com72,455
36stats.wp.com71,376
37assets.squarespace.com69,331
38static1.squarespace.com67,896
39vercel.live67,407
40browser.sentry-cdn.com67,066
41definitions.sqspcdn.com66,563
42static.parastorage.com64,670
43example.com64,106
44use.fontawesome.com63,849
45youtube.com63,387
46cdn.ampproject.org62,753
47www.apple.com61,172
48assets.pinterest.com59,117
49cdn.dashjs.org58,088
50maxcdn.bootstrapcdn.com55,287
51pinterest.com53,106
52instagram.com51,019
53facebook.com50,004
54fonts.gstatic.com49,975
55www.dailymotion.com48,692
56plus.google.com47,492
57linkedin.com47,363
58api.tinybird.co47,125
59bsky.app45,172
60support.google.com44,179
61js.hcaptcha.com43,751
62reddit.com43,467
63cdn.shopify.com42,564
64calendly.com41,487
65www.collegehumor.com40,864
66blip.tv40,811
67flickr.com40,804
68www.hulu.com40,755
69www.funnyordie.com40,752
70embed-ssl.ted.com40,690
71embed.revision3.com40,660
72monorail-edge.shopifysvc.com39,861
73monorail-edge-ca.shopifycloud.com39,715
74monorail-edge-staging.shopifycloud.com39,707
75otlp-http-production.shopifysvc.com39,706
76digg.com39,639
77shop.app39,620
78admin.shopify.com39,525
79shopify.dev39,471
80help.shopify.com39,423
81error-analytics-production.shopifysvc.com39,399
82error-analytics-sessions-production.shopifysvc.com39,387
83www.shopify.com39,387
84pay.shopify.com39,364
85checkout.pci.shopifyinc.com39,347
86content.global-e.com39,342
87extensions.shopifycdn.com39,326
88checkout.shopify.com39,321
89notify.bugsnag39,318
90atlas.shopifysvc.com39,317
91app.shopify.com39,313
92server.shop.app39,313
93frontend-event-collector-staging.shopifysvc.com39,053
94frontend-event-collector.shopifysvc.com39,053
95ucp.dev39,051
96framerusercontent.com38,689
97events.framer.com38,508
98help.shop.app38,038
99go.microsoft.com37,910
100aka.ms37,756
101payments.google.com37,643
102redacted.invalid37,610
103privacy.shopify.com37,598
104europesnus.de37,593
105europesnus.fr37,593
106europesnus.nl37,593
107europesnus.se37,593
108fr.stance.eu.com37,593
109holysmile.de37,593
110suomi-nikotiinipussit.fi37,593
111www.lankeleisi.se37,593
112www.suomi-nikotiinipussit.fi37,593
113www.truemed.com37,478
114feedburner.google.com36,910
115threads.net36,876
116shop-server.shop.dev36,345
117i.ytimg.com36,125
118api.whatsapp.com36,052
119tiktok.com35,916
120challenges.cloudflare.com35,412
121www.paypal.com35,405
122www.gstatic.com34,683
123vk.com34,002
124savvycal.com32,954
125profiles.wordpress.org32,953
126www.adobe.com32,046
127c.paypal.com30,848
128translate.google.com30,411
129kit.fontawesome.com29,833
130js.stripe.com29,702
131www.openstreetmap.org27,651
132img1.wsimg.com27,197
133oss.maxcdn.com26,782
134www.google-analytics.com26,571
135www.tiktok.com25,069
136leafletjs.com25,061
137getpocket.com24,877
138vuejs.org24,597
139www.youtube23,541
140www.xing.com23,324
141developer.mozilla.org22,942
142play.google.com22,736
143www.googleapis.com21,984
144telegram.me21,947
145connect.ok.ru21,700
146stackpath.bootstrapcdn.com21,611
147graph.facebook.com21,105
148delicious.com20,691
149va.vercel-scripts.com20,598
150pay.google.com20,397
151nextjs.org20,376
152cdn.plyr.io20,246
153www.tumblr.com19,983
154apps.apple.com19,955
155www.googleadservices.com19,149
156docs.google.com18,712
157applepay.cdn-apple.com18,488
158accounts.google.com18,400
159static.addtoany.com18,217
160static-na.payments-amazon.com18,071
161html5shiv.googlecode.com18,049
162checkout.pci.shopifyinc.ninja17,425
163cdn.gtranslate.net16,800
164web.skype.com16,800
165static.klaviyo.com16,756
166ipapi.co16,720
167api.mapbox.com16,605
168www.stumbleupon.com16,553
169web.whatsapp.com16,520
170s3.amazonaws.com16,458
171w.soundcloud.com16,449
172service.weibo.com16,425
173images.unsplash.com16,255
174cdn-cookieyes.com15,943
175www.blogger.com15,937
176open.spotify.com15,828
177c0.wp.com15,775
178cdn.tailwindcss.com15,507
179widgets.wp.com15,338
180noembed.com15,295
181www.example.com15,192
182json-schema.org15,101
183consent.cookiebot.com14,757
184plausible.io14,609
185www.reddit.com14,488
186dev.w3.org14,487
187ad.doubleclick.net14,392
188fonts.bunny.net14,157
189developers.google.com14,034
190cct.google13,729
191creativecommons.org13,660
192bit.ly13,554
193adservice.google.com13,541
194daks2k3a4ib2z.cloudfront.net13,509
195m.youtube.com13,453
196ade.googlesyndication.com13,317
197interfaces.zapier.com13,167
198cdn.zapier.com13,040
199connect.mail.ru12,973
200storage.googleapis.com12,944

Questions

What counts as a third-party host?
A host outside the site's own registrable domain that the stored source names: the src of a script or iframe tag, the href of a stylesheet link, or an absolute URL inside one of the site's own scripts (a fetch, a beacon, an image). A subdomain of the site itself is not third-party.
What is the list useful for?
Finding every customer of a vendor (the sites loading its widget), the reach of a CDN or font host, the sites that still load a script from a host that was retired or compromised, and the dependencies a site would break without.
Why is a host I expect missing from a site?
The crawler stores the served HTML and the first-party scripts; a host that only a tag manager or a third-party script adds at run time is not in the stored bytes, so it is not listed. Rendered pages, where the crawler ran the page in a browser, include what the render loaded.

See also sites by tracking ID, by technology, or the profile of one site.