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 |
|---|---|---|---|---|
| AS214716 | Other Business | 10 | 3 | WEYRO LTD |
| AS212109 | ISP & Mobile | 10 | 2 | Squirrel Internet Ltd |
| AS41000 | Hosting Provider | 10 | 2 | Freethought Internet Limited |
| AS42228 | Other Business | 10 | 2 | Brightstar Limited |
| AS16260 | ISP & Mobile | 10 | 1 | GTT - EMEA Ltd. |
| AS209243 | Hosting Provider | 10 | 1 | QuickHostUK Limited |
| AS29017 | Other Business | 10 | 1 | NTT Global Data Centers EMEA UK Ltd. |
| AS47631 | Other Business | 10 | 1 | SIP COMMUNICATIONS LIMITED |
| AS199186 | Other Business | 10 | 0 | Daniel Thomas Atkinson |
| AS199452 | ISP & Mobile | 10 | 0 | MS3 Networks Ltd |
| AS199717 | Other Business | 10 | 0 | Panoptics Global Ltd |
| AS208035 | Other Business | 10 | 0 | Venom IT Ltd |
| AS208949 | Other Business | 10 | 0 | HBING LIMITED |
| AS21301 | Other Business | 10 | 0 | Natwest Markets PLC |
| AS29016 | Education | 10 | 0 | Pearson Shared Services Ltd |
| AS29120 | Other Business | 10 | 0 | Mayer Brown International LLP |
| AS38870 | Other Business | 10 | 0 | BGC Partners |
| AS41012 | ISP & Mobile | 10 | 0 | The Cloud Networks Limited |
| AS47480 | Hosting Provider | 10 | 0 | Blue Tiger Solutions Limited |
| AS49823 | Other Business | 10 | 0 | Hastingwood Securities Ltd |
| AS51553 | ISP & Mobile | 10 | 0 | Telecom Plus PLC |
| AS60464 | Other Business | 10 | 0 | SUPERNET UK LIMITED |
| AS6838 | Other Business | 9 | 15 | Christopher Luke |
| AS8683 | Other Business | 9 | 10 | Nominet UK |
| AS201536 | Other Business | 9 | 9 | SANDYX SYSTEMS LIMITED |
| AS50385 | Hosting Provider | 9 | 8 | HaloCloud Network Limited |
| AS212175 | Other Business | 9 | 6 | Stelia Ltd |
| AS15692 | Other Business | 9 | 5 | Razorblue Ltd |
| AS203363 | Other Business | 9 | 2 | Kuroit Limited |
| AS208189 | ISP & Mobile | 9 | 2 | AllPoints Fibre Networks Limited |
| AS39208 | Other Business | 9 | 2 | I.P. Integration Limited |
| AS42081 | Government | 9 | 2 | European Centre for Medium-Range Weather Forecasts (ECMWF) |
| AS60426 | ISP & Mobile | 9 | 2 | WightFibre Limited |
| AS198736 | ISP & Mobile | 9 | 1 | Stream Networks Ltd |
| AS203443 | Other Business | 9 | 1 | INDERT CONNECTION LP |
| AS203649 | ISP & Mobile | 9 | 1 | GO INTERNET LTD |
| AS213094 | ISP & Mobile | 9 | 1 | Full Fibre Limited |
| AS25460 | Other Business | 9 | 1 | The Networking People (TNP) Limited |
| AS29606 | ISP & Mobile | 9 | 1 | Borwood Ltd |
| AS31273 | Other Business | 9 | 1 | Bistech Managed Services Ltd |
| AS33921 | ISP & Mobile | 9 | 1 | Lebara Ltd |
| AS41847 | Other Business | 9 | 1 | Daniel O'Mahony |
| AS43463 | Other Business | 9 | 1 | INFOCOM UK LTD |
| AS44891 | Other Business | 9 | 1 | 24 Seven Communications Ltd |
| AS49425 | Hosting Provider | 9 | 1 | Digital Realty (UK) Limited |
| AS51048 | ISP & Mobile | 9 | 1 | WIFINITY LIMITED |
| AS59816 | Other Business | 9 | 1 | 4on LTD |
| AS60670 | ISP & Mobile | 9 | 1 | WideFM Ltd |
| AS9011 | Government | 9 | 1 | The Patent Office |
| AS202020 | ISP & Mobile | 9 | 0 | Flexgrid Ltd |
| AS203067 | Other Business | 9 | 0 | GIACOM (CLOUD) LIMITED |
| AS203919 | Other Business | 9 | 0 | LUMADOCK LTD |
| AS205098 | Other Business | 9 | 0 | Cloud Gateway Limited |
| AS205917 | Other Business | 9 | 0 | Fluidone Ltd. |
| AS210814 | Other Business | 9 | 0 | VUNIFY LTD |
| AS211140 | Other Business | 9 | 0 | TRANSUNION INTERNATIONAL UK LIMITED |
| AS25421 | Other Business | 9 | 0 | John Lewis Plc. |
| AS31151 | Other Business | 9 | 0 | PERFORMANCE HORIZON GROUP LIMITED |
| AS35825 | Other Business | 9 | 0 | Guardian News and Media Limited |
| AS36218 | Hosting Provider | 9 | 0 | WHG Hosting Services Ltd |
| AS39630 | Other Business | 9 | 0 | Asptech IT Solutions Ltd |
| AS48529 | Other Business | 9 | 0 | Quantumbeam Communications Limited |
| AS50605 | Other Business | 9 | 0 | Radius Communications Ltd |
| AS51905 | Hosting Provider | 9 | 0 | Compuweb Communications Services Limited |
| AS8651 | Other Business | 9 | 0 | MUFG Securities EMEA PLC |
| AS9086 | Hosting Provider | 9 | 0 | Docklands Data Centre Ltd |
| AS204731 | ISP & Mobile | 8 | 19 | FIBRENEST LIMITED |
| AS58305 | Hosting Provider | 8 | 13 | SYN LTD |
| AS138177 | Other Business | 8 | 9 | NOMINET UK |
| AS215638 | Other Business | 8 | 7 | Cilix Limited |
| AS13002 | Hosting Provider | 8 | 5 | ISIX Communications LLP |
| AS21396 | Other Business | 8 | 4 | NetConnex Broadband Ltd. |
| AS205771 | ISP & Mobile | 8 | 3 | OCTAPLUS NETWORKS LTD |
| AS49694 | Other Business | 8 | 3 | Masternaut Limited |
| AS5500 | Other Business | 8 | 3 | Chess ICT Ltd |
| AS204413 | Other Business | 8 | 2 | Hyve Ltd |
| AS214026 | Other Business | 8 | 2 | KiNet LTD |
| AS31742 | Hosting Provider | 8 | 2 | Sota Solutions Ltd. |
| AS39921 | Hosting Provider | 8 | 2 | Rackspace Ltd. |
| AS48070 | Hosting Provider | 8 | 2 | DSM (GB) Limited |
| AS59455 | Hosting Provider | 8 | 2 | Clearstream Technology ltd |
| AS204914 | Hosting Provider | 8 | 1 | LABIXE LTD |
| AS209336 | Hosting Provider | 8 | 1 | GB Wholesale Networks LTD |
| AS25582 | ISP & Mobile | 8 | 1 | NWIP Ltd |
| AS33920 | ISP & Mobile | 8 | 1 | (aq) networks limited |
| AS42004 | ISP & Mobile | 8 | 1 | VOIP-UN LIMITED |
| AS50957 | Hosting Provider | 8 | 1 | MEMSET Ltd |
| AS60800 | Other Business | 8 | 1 | Netwise Hosting Ltd |
| AS61097 | Other Business | 8 | 1 | Softcat PLC |
| AS199909 | ISP & Mobile | 8 | 0 | ELITETELE.COM PLC |
| AS200758 | Other Business | 8 | 0 | Datagear LLP |
| AS200961 | Other Business | 8 | 0 | FIL INVESTMENT MANAGEMENT LIMITED |
| AS203897 | Other Business | 8 | 0 | ADVANIA UK LIMITED |
| AS203938 | Other Business | 8 | 0 | Samuel Cosgrove |
| AS205290 | Other Business | 8 | 0 | NAOBOROT LLP |
| AS205654 | Other Business | 8 | 0 | Labtech Systems Ltd |
| AS206411 | Hosting Provider | 8 | 0 | Fastwarp LLP |
| AS206626 | Other Business | 8 | 0 | Professional Software Design Ltd |
| AS206999 | ISP & Mobile | 8 | 0 | Oakford Internet Services Ltd |
| AS207045 | ISP & Mobile | 8 | 0 | KORE WIRELESS UK LIMITED |