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 |
|---|---|---|---|---|
| AS213734 | ISP & Mobile | 22 | 3 | ZERODESK LTD |
| AS213671 | ISP & Mobile | 22 | 2 | Vision Fibre Media LTD |
| AS199335 | ISP & Mobile | 22 | 1 | Talk Straight Ltd. |
| AS51043 | Other Business | 22 | 1 | Aspire Technology Solutions Ltd |
| AS16096 | Other Business | 22 | 0 | The Sporting Exchange (Clients) Ltd |
| AS197039 | Other Business | 22 | 0 | Nomura International Plc |
| AS199741 | ISP & Mobile | 22 | 0 | TransitX Ltd |
| AS29180 | ISP & Mobile | 22 | 0 | Telefonica UK Limited |
| AS57002 | Other Business | 22 | 0 | William Hill Organization Ltd |
| AS60194 | Other Business | 22 | 0 | Anchor Computer Systems Ltd |
| AS47638 | ISP & Mobile | 21 | 5 | Cadence Networks Ltd |
| AS13126 | Hosting Provider | 21 | 1 | Satellite Mediaport Services Ltd. |
| AS15412 | ISP & Mobile | 21 | 1 | Flag Telecom UK Limited |
| AS199542 | Hosting Provider | 21 | 0 | Iomart Managed Services Limited |
| AS205220 | Hosting Provider | 21 | 0 | RH & Co. IT Services Ltd |
| AS61373 | Other Business | 21 | 0 | Connect The World Ltd. |
| AS62163 | ISP & Mobile | 21 | 0 | IP River Limited |
| AS62313 | Hosting Provider | 21 | 0 | Proact IT UK Limited |
| AS8607 | Other Business | 20 | 4 | Digital Space Group Limited |
| AS12678 | Other Business | 20 | 2 | Badoo Trading Limited |
| AS202013 | Other Business | 20 | 0 | Mobile Internet Limited |
| AS213840 | Other Business | 20 | 0 | DDOS PROTECTION LTD |
| AS41678 | Hosting Provider | 20 | 0 | The Internet Business Ltd |
| AS44022 | Other Business | 20 | 0 | Barclays Bank PLC |
| AS44574 | Other Business | 19 | 9 | Network Services Ltd. |
| AS213529 | Hosting Provider | 19 | 3 | Sculk Ltd. |
| AS215066 | ISP & Mobile | 19 | 1 | Aquiss Limited |
| AS39522 | ISP & Mobile | 19 | 1 | Converged Communication Solutions Limited |
| AS7 | Government | 19 | 1 | The Defence Science and Technology Laboratory |
| AS199404 | Hosting Provider | 19 | 0 | WHG Hosting Services Ltd |
| AS203106 | Other Business | 19 | 0 | ClearNet Fibre Ltd |
| AS58173 | Other Business | 19 | 0 | Onwave UK Ltd |
| AS60949 | Other Business | 19 | 0 | 4x Solutions UK LTD |
| AS62217 | Hosting Provider | 18 | 17 | Vinters IT Ltd |
| AS210892 | ISP & Mobile | 18 | 10 | Lightspeed Networks Ltd |
| AS16353 | ISP & Mobile | 18 | 4 | Merula Limited |
| AS203090 | Hosting Provider | 18 | 3 | BITSFLOWCLOUD LTD |
| AS12390 | ISP & Mobile | 18 | 2 | KCOM Group Limited |
| AS43545 | Other Business | 18 | 2 | Teledata UK Limited |
| AS31445 | Other Business | 18 | 1 | Fiberax Networking&Cloud Ltd. |
| AS49375 | ISP & Mobile | 18 | 1 | No One Internet Ltd |
| AS206934 | Hosting Provider | 18 | 0 | Beeks Financial Cloud Ltd |
| AS21260 | Hosting Provider | 18 | 0 | The Positive Internet Company Ltd |
| AS207567 | Other Business | 17 | 8 | Intezio Worldwide Limited |
| AS205394 | ISP & Mobile | 17 | 6 | CSL (DualCom) Limited |
| AS61049 | ISP & Mobile | 17 | 6 | Exascale Ltd |
| AS198037 | Hosting Provider | 17 | 5 | SPACECORE SOLUTION LTD |
| AS212913 | Other Business | 17 | 2 | TIME-HOST LTD |
| AS34555 | ISP & Mobile | 17 | 1 | C.C.S. (Leeds) Ltd |
| AS41811 | ISP & Mobile | 17 | 1 | CONVERGENCE (GROUP NETWORKS) LIMITED |
| AS49485 | Hosting Provider | 17 | 1 | High Availability Hosting Limited |
| AS197107 | Other Business | 17 | 0 | SERVICE EXPRESS EUROPE LIMITED |
| AS199058 | Hosting Provider | 17 | 0 | SERVA ONE LTD |
| AS200904 | Hosting Provider | 17 | 0 | FOXCLOUD LLP |
| AS202038 | Other Business | 17 | 0 | Intercity Technology Ltd |
| AS20695 | Other Business | 17 | 0 | Capital One (Europe) Plc |
| AS9084 | Other Business | 17 | 0 | Goldman Sachs International |
| AS41230 | ISP & Mobile | 16 | 7 | ASK4 Limited |
| AS43872 | ISP & Mobile | 16 | 7 | Optinet U.K. Limited |
| AS57793 | ISP & Mobile | 16 | 6 | 1310 Limited |
| AS203446 | Other Business | 16 | 5 | SMARTNET LIMITED |
| AS15570 | ISP & Mobile | 16 | 1 | PACKETFABRIC (UK) LTD |
| AS203054 | Other Business | 16 | 1 | TownFibre Connect Ltd |
| AS47474 | Other Business | 16 | 1 | Virtual1 Limited |
| AS8586 | ISP & Mobile | 16 | 1 | TalkTalk Communications Limited |
| AS12789 | Other Business | 16 | 0 | DMG Media Limited |
| AS13205 | ISP & Mobile | 16 | 0 | British Telecommunications PLC |
| AS15641 | Other Business | 16 | 0 | Arqiva Communications Ltd |
| AS201988 | Other Business | 16 | 0 | VPSPay Networks LTD |
| AS205039 | ISP & Mobile | 16 | 0 | Beacon Broadband LTD |
| AS211392 | Other Business | 16 | 0 | DREAM CLOUD INNOVATION LIMITED |
| AS213169 | Hosting Provider | 16 | 0 | Catixs Ltd |
| AS214271 | ISP & Mobile | 16 | 0 | QT NETWORK LTD |
| AS214438 | Hosting Provider | 16 | 0 | NexGen Cloud Ltd |
| AS56696 | ISP & Mobile | 16 | 0 | Liquid Telecommunications Ltd |
| AS50113 | Hosting Provider | 15 | 29 | FIRST SERVER LIMITED |
| AS5482 | ISP & Mobile | 15 | 16 | AllPoints Fibre Limited |
| AS41231 | Other Business | 15 | 11 | Canonical Group Limited |
| AS56382 | Hosting Provider | 15 | 8 | vServer.site LTD |
| AS204167 | Other Business | 15 | 4 | Hyve Ltd |
| AS35266 | Hosting Provider | 15 | 4 | EX Networks Limited |
| AS15533 | Hosting Provider | 15 | 2 | Redcentric Solutions Ltd |
| AS212743 | Other Business | 15 | 2 | ETERNITY INTERNATIONAL LIMITED |
| AS34119 | Hosting Provider | 15 | 2 | Wildcard UK Limited |
| AS15572 | ISP & Mobile | 15 | 1 | Verizon UK Limited |
| AS202282 | ISP & Mobile | 15 | 1 | FIBRUS NETWORKS LTD |
| AS41107 | ISP & Mobile | 15 | 1 | Backbone Connect Limited |
| AS51082 | Hosting Provider | 15 | 1 | A1 NETWORK EXCHANGE LIMITED |
| AS58325 | Hosting Provider | 15 | 1 | Hydra Communications Ltd |
| AS16212 | ISP & Mobile | 15 | 0 | Telesat International Ltd |
| AS213755 | Other Business | 15 | 0 | LUNORY CLOUD SOLUTIONS LTD |
| AS33820 | Other Business | 15 | 0 | RELX GROUP PLC |
| AS48294 | ISP & Mobile | 15 | 0 | Spectrum Internet Ltd |
| AS57099 | ISP & Mobile | 15 | 0 | Quickline Communications Limited |
| AS30931 | Other Business | 14 | 5 | IG Index Ltd. |
| AS51263 | ISP & Mobile | 14 | 1 | County Broadband Ltd |
| AS61414 | Hosting Provider | 14 | 1 | EDGENAP LTD |
| AS198636 | Hosting Provider | 14 | 0 | CAPSULA LTD |
| AS199713 | ISP & Mobile | 14 | 0 | MLL Telecom Ltd. |
| AS201739 | ISP & Mobile | 14 | 0 | Metranet Communications Ltd. |