A list of all United Kingdom ASNs including hosting providers, ISPs, and businesses with announced IPv4 and IPv6 prefixes.
| ASN | Type | IPv4 Routes | IPv6 Routes | Company |
|---|---|---|---|---|
| AS51329 | Other Business | 2 | 0 | CONNECTION NETWORKS L.P. |
| AS51491 | Other Business | 2 | 0 | SysGroup plc |
| AS51762 | Other Business | 2 | 0 | Adversor LLP |
| AS51823 | ISP & Mobile | 2 | 0 | Microtalk Europe Ltd |
| AS51845 | Other Business | 2 | 0 | WATERSTONS LIMITED |
| AS56335 | Other Business | 2 | 0 | Nocsult Ltd |
| AS56460 | ISP & Mobile | 2 | 0 | Telefonica UK Limited |
| AS56644 | Other Business | 2 | 0 | Fundtech Financial Messaging Ltd |
| AS56670 | Government | 2 | 0 | West Sussex County Council |
| AS56850 | Hosting Provider | 2 | 0 | Akari Networks Ltd |
| AS57740 | Other Business | 2 | 0 | Hermes Datacommunications International Limited |
| AS58062 | Other Business | 2 | 0 | w1n ltd |
| AS59619 | Government | 2 | 0 | Blackpool Borough Council |
| AS59724 | Other Business | 2 | 0 | Elsevier Limited |
| AS59803 | Other Business | 2 | 0 | DATAQUEST (HEATHROW) LIMITED |
| AS59820 | ISP & Mobile | 2 | 0 | Astro Communications LTD |
| AS60060 | Other Business | 2 | 0 | AECOM Limited |
| AS60382 | Education | 2 | 0 | Cranleigh School |
| AS60654 | Other Business | 2 | 0 | Metdesk Ltd |
| AS60851 | Other Business | 2 | 0 | Egton Medical Information Systems Limited |
| AS60898 | Other Business | 2 | 0 | Aquis Exchange Limited |
| AS61093 | Other Business | 2 | 0 | Solution Computers Ltd |
| AS62299 | Other Business | 2 | 0 | Bluematrix Research LTD |
| AS62364 | Government | 2 | 0 | Plymouth City Council |
| AS6779 | Other Business | 2 | 0 | Fujitsu Services Ltd. |
| AS6911 | Other Business | 2 | 0 | Associated Networks (UK) Limited |
| AS8619 | Other Business | 2 | 0 | Close Brothers Limited |
| AS9090 | Other Business | 2 | 0 | PR Newswire Europe Ltd. |
| AS204318 | Other Business | 1 | 259 | Benjamin Cartwright-Cox |
| AS202939 | Other Business | 1 | 20 | Chimon Technology Ltd |
| AS204539 | ISP & Mobile | 1 | 18 | Axivora Connect LtD |
| AS215172 | Other Business | 1 | 18 | JIANYUELAB LTD |
| AS213618 | Other Business | 1 | 16 | ONESHOME COMMUNICATIONS LTD |
| AS209710 | Other Business | 1 | 13 | SNRD NETWORKS LIMITED |
| AS57110 | Other Business | 1 | 13 | Aaran Perry |
| AS210025 | Other Business | 1 | 10 | Alice Cat Research Ltd |
| AS211431 | Other Business | 1 | 9 | Andrew Aubury |
| AS213798 | Other Business | 1 | 9 | Jude Gabriel Powell |
| AS44749 | ISP & Mobile | 1 | 9 | Pinnacom Ltd |
| AS200950 | Other Business | 1 | 7 | Calibour Limited |
| AS207960 | ISP & Mobile | 1 | 7 | AS207960 Cyfyngedig |
| AS213436 | Other Business | 1 | 7 | NIUZI DADA CLOUD LIMITED |
| AS214420 | Other Business | 1 | 7 | Conor Lewis |
| AS202400 | Other Business | 1 | 6 | TAIPEI101 NETWORK LTD |
| AS202359 | ISP & Mobile | 1 | 5 | AS207960 Cyfyngedig |
| AS207936 | Other Business | 1 | 5 | Konstantin Verba |
| AS212232 | Other Business | 1 | 5 | Port 179 LTD |
| AS47556 | Other Business | 1 | 5 | Webtitude LTD |
| AS207748 | Other Business | 1 | 4 | Stephen Fraser |
| AS208723 | Hosting Provider | 1 | 4 | VDX SYSTEMS LTD |
| AS214770 | Other Business | 1 | 4 | RGN Holding Ltd. |
| AS50391 | Hosting Provider | 1 | 4 | DIVERGENT NETWORKS LTD |
| AS51692 | Hosting Provider | 1 | 4 | Steven Smith trading as HyberHost |
| AS60431 | Other Business | 1 | 4 | PNO Solutions Limited |
| AS60735 | Other Business | 1 | 4 | Konstantin Verba |
| AS20596 | Other Business | 1 | 3 | Future Publishing Ltd |
| AS206033 | Hosting Provider | 1 | 3 | Repox Labs Ltd |
| AS207754 | Other Business | 1 | 3 | James Colderwood |
| AS209297 | Other Business | 1 | 3 | NICHI YOROZUYA LTD |
| AS209669 | Other Business | 1 | 3 | Ashley Primo |
| AS212068 | Other Business | 1 | 3 | Alioth Systems Limited |
| AS201765 | Hosting Provider | 1 | 2 | NECTMANIA NETWORK LIMITED |
| AS202306 | Hosting Provider | 1 | 2 | HOSTGLOBAL.PLUS LTD |
| AS204208 | Hosting Provider | 1 | 2 | Peravix Group LTD |
| AS204776 | Other Business | 1 | 2 | Jessica Smith |
| AS206984 | Other Business | 1 | 2 | Lypy Limited |
| AS207925 | ISP & Mobile | 1 | 2 | Squirrel Internet Ltd |
| AS208393 | Other Business | 1 | 2 | Dedcloud Network Ltd |
| AS210812 | Other Business | 1 | 2 | Christopher Pritchard |
| AS213565 | Other Business | 1 | 2 | David Davies |
| AS213646 | ISP & Mobile | 1 | 2 | Monkey Tree Hosting Limited |
| AS214199 | Other Business | 1 | 2 | Johnathan Hine |
| AS214294 | Other Business | 1 | 2 | NOOB RP LTD |
| AS214323 | Other Business | 1 | 2 | Marcus Hughes |
| AS214670 | ISP & Mobile | 1 | 2 | No Metric Limited |
| AS215269 | Other Business | 1 | 2 | LAZYCLOUD LTD |
| AS44355 | Hosting Provider | 1 | 2 | Colocation Ltd |
| AS60894 | Hosting Provider | 1 | 2 | Flownet Solutions Ltd |
| AS12628 | Other Business | 1 | 1 | JACO ENGELBRECHT |
| AS15418 | Hosting Provider | 1 | 1 | Fasthosts Internet Limited |
| AS15689 | Other Business | 1 | 1 | Advanced IT Services Nottingham Ltd |
| AS197284 | Other Business | 1 | 1 | K3X SYSTEMS Ltd |
| AS197758 | Other Business | 1 | 1 | NXLayer Ltd |
| AS198189 | Other Business | 1 | 1 | Throttle Limited |
| AS198375 | Other Business | 1 | 1 | Delusion Limited |
| AS198741 | Other Business | 1 | 1 | Amelia Kalinowska |
| AS198981 | Other Business | 1 | 1 | NETSHIELD LTD |
| AS199165 | Other Business | 1 | 1 | Shibboleet Ltd |
| AS199330 | Other Business | 1 | 1 | CentralNic Ltd |
| AS199649 | Other Business | 1 | 1 | KTS Technology Group Limited |
| AS199738 | Hosting Provider | 1 | 1 | VATORA LIMITED |
| AS199794 | Hosting Provider | 1 | 1 | EMOCLOUD LTD |
| AS199948 | Other Business | 1 | 1 | Cosmorack Ltd |
| AS199954 | Other Business | 1 | 1 | Techwareca Ltd. |
| AS200027 | Other Business | 1 | 1 | RDA GROUP LIMITED |
| AS200280 | Other Business | 1 | 1 | Cameron Sharp |
| AS200416 | Other Business | 1 | 1 | Genius Sports UK Limited |
| AS200425 | Other Business | 1 | 1 | Genius Sports UK Limited |
| AS200581 | Government | 1 | 1 | TfW Fibre Ltd |
| AS200652 | Other Business | 1 | 1 | Nuvias UC Limited |