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 |
|---|---|---|---|---|
| AS214315 | Other Business | 1 | 0 | Cushman & Wakefield Debenham Tie Leung Limited |
| AS214424 | Other Business | 1 | 0 | nForto Ltd |
| AS214455 | ISP & Mobile | 1 | 0 | RETN Limited |
| AS214637 | Other Business | 1 | 0 | Online Projects LTD |
| AS21464 | Other Business | 1 | 0 | EDF Trading Ltd |
| AS215303 | ISP & Mobile | 1 | 0 | Qubitbytes LTD |
| AS215497 | Other Business | 1 | 0 | Tivarri Limited |
| AS215551 | Other Business | 1 | 0 | KeFF Networks Ltd |
| AS215635 | Other Business | 1 | 0 | NUSO CLOUD UK LIMITED |
| AS215636 | Other Business | 1 | 0 | NUSO CLOUD UK LIMITED |
| AS215915 | Hosting Provider | 1 | 0 | Deep Green Technologies Ltd |
| AS215959 | Other Business | 1 | 0 | NUSO CLOUD UK LIMITED |
| AS216014 | Other Business | 1 | 0 | BestDC Limited |
| AS216036 | Other Business | 1 | 0 | Signal Telecom Ltd |
| AS216121 | Hosting Provider | 1 | 0 | Valkyrie Hosting LTD |
| AS216376 | Other Business | 1 | 0 | Pinkfroot Ltd |
| AS219463 | Other Business | 1 | 0 | THEBATTLE GROUP LTD |
| AS24742 | Other Business | 1 | 0 | APAK Group Limited |
| AS24894 | Other Business | 1 | 0 | Tag Europe Ltd |
| AS25050 | Other Business | 1 | 0 | VOCALINK LTD |
| AS25343 | Education | 1 | 0 | Coventry University Computing Services |
| AS25464 | Other Business | 1 | 0 | Telesign Mobile Limited |
| AS28934 | Other Business | 1 | 0 | Mizuho International Plc |
| AS29019 | Other Business | 1 | 0 | Morningstar Europe Limited |
| AS29048 | Other Business | 1 | 0 | Equiduct Systems Limited |
| AS29446 | Other Business | 1 | 0 | ChunkyChips.net Limited |
| AS30769 | Other Business | 1 | 0 | The Berkeley Group plc |
| AS30894 | Other Business | 1 | 0 | SINCH UK LTD. |
| AS31632 | Other Business | 1 | 0 | OAG Aviation WorldWide Limited |
| AS3206 | Other Business | 1 | 0 | AF Blakemore & Son Ltd |
| AS3220 | Other Business | 1 | 0 | Internet Technology Advisors Scandinavia Ab |
| AS33854 | Hosting Provider | 1 | 0 | Nuco Technologies Ltd |
| AS33879 | Other Business | 1 | 0 | Forth Ports Public Limited Company |
| AS33968 | Hosting Provider | 1 | 0 | EASYSPACE LIMITED |
| AS33975 | Other Business | 1 | 0 | NetConsult Ltd |
| AS34611 | Other Business | 1 | 0 | Matthew Southgate |
| AS34640 | Other Business | 1 | 0 | CME Operations Limited |
| AS34654 | ISP & Mobile | 1 | 0 | Merula Limited |
| AS34675 | Other Business | 1 | 0 | Prima Internet Holdings Limited |
| AS34746 | Other Business | 1 | 0 | AXA Insurance UK plc |
| AS34900 | Other Business | 1 | 0 | CME Operations Limited |
| AS35200 | ISP & Mobile | 1 | 0 | TransitX Ltd |
| AS35241 | ISP & Mobile | 1 | 0 | Vostel Limited |
| AS35259 | Other Business | 1 | 0 | APM Internet Ltd |
| AS35299 | Education | 1 | 0 | C2k |
| AS35838 | Other Business | 1 | 0 | CCANET Limited |
| AS38936 | Other Business | 1 | 0 | Herman Miller LTD |
| AS39414 | Other Business | 1 | 0 | ByteFetch Ltd |
| AS39459 | Other Business | 1 | 0 | Office Unlocked Limited |
| AS39461 | ISP & Mobile | 1 | 0 | EDF ENERGY NUCLEAR GENERATION LIMITED |
| AS39520 | Other Business | 1 | 0 | Satcom Direct International Ltd. |
| AS39620 | Other Business | 1 | 0 | NG BAILEY IT SERVICES LIMITED |
| AS39627 | ISP & Mobile | 1 | 0 | Sky UK Limited |
| AS39715 | Other Business | 1 | 0 | PLATINUM HEDGEHOG CONSULTANCY LIMITED |
| AS39717 | ISP & Mobile | 1 | 0 | Polestar Ltd |
| AS41232 | ISP & Mobile | 1 | 0 | Beeline Broadband Ltd |
| AS41373 | Government | 1 | 0 | NATIONAL HEALTH SERVICE |
| AS41380 | Other Business | 1 | 0 | Ald Automotive Ltd |
| AS41493 | Other Business | 1 | 0 | Cboe Europe Limited |
| AS41548 | Government | 1 | 0 | Medway Council |
| AS41553 | Other Business | 1 | 0 | Reed Specialist Recruitment Limited |
| AS41612 | Other Business | 1 | 0 | Red Bee Media Limited |
| AS41751 | Other Business | 1 | 0 | OCADO RETAIL LIMITED |
| AS41936 | ISP & Mobile | 1 | 0 | Colt International Ltd |
| AS41988 | Other Business | 1 | 0 | TAKING CARE PERSONAL ALARMS LIMITED |
| AS42046 | Other Business | 1 | 0 | Independent Television News Limited |
| AS42359 | Other Business | 1 | 0 | The Football Association Ltd. |
| AS42465 | Other Business | 1 | 0 | Forcepoint UK Limited |
| AS42466 | ISP & Mobile | 1 | 0 | Meteoric Ltd |
| AS42479 | Other Business | 1 | 0 | KLDiscovery Limited |
| AS42536 | Other Business | 1 | 0 | Deloitte LLP |
| AS42875 | Other Business | 1 | 0 | National Car Parks Limited |
| AS42880 | Other Business | 1 | 0 | EntServ UK Limited |
| AS43079 | Other Business | 1 | 0 | MATCHTECH GROUP (UK) LIMITED |
| AS43236 | Other Business | 1 | 0 | Bluecrest Capital Management LLP |
| AS43392 | Other Business | 1 | 0 | RBC Global Asset Management (UK) Limited |
| AS44268 | Other Business | 1 | 0 | J.C. BAMFORD EXCAVATORS LIMITED |
| AS44426 | Other Business | 1 | 0 | Synectics Solutions Ltd |
| AS44442 | Government | 1 | 0 | The Borough of Telford and Wrekin Council |
| AS44504 | Other Business | 1 | 0 | Andy Davidson |
| AS44516 | ISP & Mobile | 1 | 0 | China Telecom Europe Ltd. |
| AS44617 | Other Business | 1 | 0 | HBK EUROPE MANAGEMENT LLP |
| AS44697 | Other Business | 1 | 0 | Computer & Communication Co. Limited |
| AS44782 | Other Business | 1 | 0 | Stratos Markets Limited |
| AS44824 | Other Business | 1 | 0 | COMMI HOLDINGS LIMITED |
| AS47113 | Other Business | 1 | 0 | Suffolk Life Pensions Limited |
| AS47255 | Other Business | 1 | 0 | MCD Europe Limited |
| AS47367 | Government | 1 | 0 | Torbay Economic Development Company Limited |
| AS47534 | Other Business | 1 | 0 | VOCALINK LTD |
| AS47578 | Other Business | 1 | 0 | PRT Systems Limited |
| AS47685 | ISP & Mobile | 1 | 0 | Bogons Heavy Industries (North) Ltd |
| AS47744 | Other Business | 1 | 0 | XTEND SOLUTIONS LTD |
| AS47791 | Other Business | 1 | 0 | Electronic Arts Limited |
| AS48003 | Other Business | 1 | 0 | Wm Morrison Supermarkets Limited |
| AS48460 | Hosting Provider | 1 | 0 | ServerHouse Ltd |
| AS48632 | Other Business | 1 | 0 | BTS HOLDINGS PLC |
| AS48706 | Other Business | 1 | 0 | KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED |
| AS49049 | Government | 1 | 0 | Bath North East Somerset Council |
| AS49209 | ISP & Mobile | 1 | 0 | China Telecom Europe Ltd. |
| AS49247 | Government | 1 | 0 | East Sussex Fire Authority |