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 |
|---|---|---|---|---|
| AS202161 | Other Business | 14 | 0 | M&G INVESTMENT MANAGEMENT LIMITED |
| AS205434 | Other Business | 14 | 0 | BE SLOUGH DC UK LIMITED |
| AS212581 | Other Business | 14 | 0 | SGX FX SYSTEMS UK LIMITED |
| AS24867 | Hosting Provider | 14 | 0 | Rackspace Ltd. |
| AS28846 | Other Business | 14 | 0 | ITV Services Limited |
| AS28939 | Other Business | 14 | 0 | ARM Ltd |
| AS29676 | ISP & Mobile | 14 | 0 | Gradwell Communications Limited |
| AS39116 | Hosting Provider | 14 | 0 | Telehouse International Corporation of Europe Ltd |
| AS42353 | Other Business | 14 | 0 | Simwood eSMS Limited |
| AS42705 | ISP & Mobile | 14 | 0 | Talia Limited |
| AS44521 | Other Business | 14 | 0 | Jagex Limited |
| AS57168 | Hosting Provider | 14 | 0 | Amito Ltd |
| AS57994 | Other Business | 14 | 0 | NetEarth UK Ltd |
| AS52041 | Hosting Provider | 13 | 8 | Scaleblade, Ltd. |
| AS212396 | Hosting Provider | 13 | 3 | FyfeWeb Ltd |
| AS31472 | ISP & Mobile | 13 | 2 | VoiceHost Ltd |
| AS3213 | ISP & Mobile | 13 | 2 | Bogons Ltd |
| AS13173 | Other Business | 13 | 1 | Foreshore Limited |
| AS205892 | Other Business | 13 | 1 | Nomical Ltd |
| AS2589 | Other Business | 13 | 1 | Wanstor Ltd |
| AS34920 | Hosting Provider | 13 | 1 | Team Blue Carrier Limited |
| AS42010 | Hosting Provider | 13 | 1 | I.T. PROFESSIONAL SERVICES LIMITED |
| AS5587 | Hosting Provider | 13 | 1 | Itility Limited |
| AS200514 | Hosting Provider | 13 | 0 | KnownSRV Ltd. |
| AS203758 | Hosting Provider | 13 | 0 | EUGAMEHOST LTD |
| AS204044 | ISP & Mobile | 13 | 0 | Packet Star Networks Limited |
| AS21054 | Other Business | 13 | 0 | Natwest Markets PLC |
| AS213915 | Other Business | 13 | 0 | HOSTES LTD |
| AS29400 | Other Business | 13 | 0 | TP ICAP GROUP SERVICES LIMITED |
| AS31220 | Hosting Provider | 13 | 0 | Six Degrees Technology Group Limited |
| AS34967 | Other Business | 13 | 0 | DRD Communications Limited |
| AS39097 | Other Business | 13 | 0 | Maintel Europe Limited |
| AS41362 | Other Business | 13 | 0 | Royal London Management Services Limited |
| AS44646 | Other Business | 13 | 0 | Gamesys Ltd. |
| AS50056 | Other Business | 13 | 0 | Vorboss Limited |
| AS56474 | Other Business | 13 | 0 | Computacenter (UK) Ltd |
| AS59778 | Hosting Provider | 13 | 0 | Synextra Limited |
| AS212465 | Government | 12 | 8 | Comcast International Holdings UK Limited |
| AS205975 | Other Business | 12 | 6 | Fibre Assets Ltd |
| AS214927 | Hosting Provider | 12 | 2 | PSB HOSTING LTD |
| AS25098 | ISP & Mobile | 12 | 2 | Netcalibre Ltd |
| AS39588 | Other Business | 12 | 2 | Mimecast Services Limited |
| AS60297 | Other Business | 12 | 2 | Capgemini UK plc |
| AS8282 | ISP & Mobile | 12 | 2 | Bink Group Ltd |
| AS13005 | ISP & Mobile | 12 | 1 | Atlas Business Group of Companies Ltd |
| AS16082 | ISP & Mobile | 12 | 1 | Spitfire Network Services Limited |
| AS198440 | ISP & Mobile | 12 | 1 | AllPoints Fibre Networks Limited |
| AS216039 | Hosting Provider | 12 | 1 | EdgeSec Technologies Limited |
| AS28792 | ISP & Mobile | 12 | 1 | Public Internet Ltd |
| AS52148 | Hosting Provider | 12 | 1 | Enix Ltd |
| AS61337 | ISP & Mobile | 12 | 1 | Single Mode Networks Ltd |
| AS15753 | Other Business | 12 | 0 | BP International Ltd |
| AS199775 | ISP & Mobile | 12 | 0 | Connexin Limited |
| AS200658 | Other Business | 12 | 0 | CoreCloud Systems Ltd |
| AS201126 | Other Business | 12 | 0 | CDW Ltd |
| AS209326 | Other Business | 12 | 0 | AMPHORA TRADING LTD |
| AS210099 | Hosting Provider | 12 | 0 | TIGOVA NETWORK LIMITED |
| AS21077 | Other Business | 12 | 0 | Specialist Computer Centres Plc |
| AS213990 | Other Business | 12 | 0 | AOFB Telecom Networks Ltd |
| AS31474 | Other Business | 12 | 0 | Viacom International Media Networks U.K. Limited |
| AS35071 | ISP & Mobile | 12 | 0 | Xoom Limited |
| AS41951 | Other Business | 12 | 0 | GlobecastUK Ltd |
| AS47143 | Other Business | 12 | 0 | Todayhost Limited |
| AS48589 | Other Business | 12 | 0 | Tiger Network Limited |
| AS49229 | Other Business | 12 | 0 | ANS Group Limited |
| AS50077 | Hosting Provider | 12 | 0 | SYN LTD |
| AS51409 | Other Business | 12 | 0 | sipsynergy Ltd |
| AS60542 | Hosting Provider | 12 | 0 | Next Internet Network Ltd |
| AS52025 | ISP & Mobile | 11 | 56 | ParadoxNetworks Limited |
| AS210457 | Other Business | 11 | 18 | Kyonix Networks Limited |
| AS214266 | ISP & Mobile | 11 | 12 | ZERODESK LTD |
| AS211612 | Hosting Provider | 11 | 8 | Datacamp Limited |
| AS210619 | ISP & Mobile | 11 | 4 | Monkey Tree Hosting Limited |
| AS30827 | Hosting Provider | 11 | 3 | Extraordinary Managed Services Ltd |
| AS212683 | ISP & Mobile | 11 | 2 | Olilo UK & Ireland Ltd |
| AS35826 | ISP & Mobile | 11 | 2 | Netservers Limited |
| AS42427 | Other Business | 11 | 2 | Mimecast Services Limited |
| AS15510 | Hosting Provider | 11 | 1 | Compuweb Communications Services Limited |
| AS205072 | Hosting Provider | 11 | 1 | Layershift Limited |
| AS21472 | Hosting Provider | 11 | 1 | ServerHouse Ltd |
| AS29527 | Hosting Provider | 11 | 1 | Astutium Limited |
| AS29550 | Hosting Provider | 11 | 1 | Team Blue Carrier Limited |
| AS34442 | Other Business | 11 | 1 | BNW TECHNOLOGY LTD |
| AS35399 | Other Business | 11 | 1 | Online50 Limited |
| AS57022 | Hosting Provider | 11 | 1 | HFD DATAVITA LIMITED |
| AS135392 | Hosting Provider | 11 | 0 | MillenialHost Limited |
| AS197574 | Other Business | 11 | 0 | ExpressHost Ltd |
| AS200660 | Hosting Provider | 11 | 0 | QONZER LTD |
| AS204260 | Government | 11 | 0 | Registers of Scotland |
| AS2147 | Other Business | 11 | 0 | The Press Association Limited |
| AS25335 | ISP & Mobile | 11 | 0 | NEXT GLOBAL SERVICES L.P. |
| AS28757 | ISP & Mobile | 11 | 0 | Scotnet.co.uk Ltd |
| AS34066 | ISP & Mobile | 11 | 0 | Telappliant Limited |
| AS43949 | Other Business | 11 | 0 | Marsh Limited |
| AS50910 | ISP & Mobile | 11 | 0 | Mainstream Digital Ltd |
| AS57624 | Hosting Provider | 11 | 0 | Beeks Financial Cloud Ltd |
| AS210258 | ISP & Mobile | 10 | 58 | Wildanet Ltd |
| AS208621 | Hosting Provider | 10 | 8 | LogicForge Limited |
| AS212890 | Other Business | 10 | 6 | ONEMAN NETWORK LIMITED |
| AS62172 | ISP & Mobile | 10 | 4 | AIRBYTES COMMUNICATIONS Limited |