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 |
|---|---|---|---|---|
| AS211760 | Other Business | 2 | 0 | Cleveland Clinic London Ltd |
| AS212035 | Other Business | 2 | 0 | Babcock Corporate Services Ltd |
| AS212152 | Other Business | 2 | 0 | Beazley Management Limited |
| AS212158 | Other Business | 2 | 0 | TransFICC Ltd. |
| AS212399 | ISP & Mobile | 2 | 0 | Gigaair Ltd |
| AS212601 | Other Business | 2 | 0 | Calastone Limited |
| AS212646 | Other Business | 2 | 0 | Sporting Solutions Services Limited |
| AS212656 | Hosting Provider | 2 | 0 | 3verest Limited |
| AS212660 | Hosting Provider | 2 | 0 | WHG Hosting Services Ltd |
| AS212694 | ISP & Mobile | 2 | 0 | Applied Satellite Technology Ltd |
| AS2129 | Other Business | 2 | 0 | EntServ UK Limited |
| AS213051 | Hosting Provider | 2 | 0 | Zenex 5ive Limited |
| AS213460 | Other Business | 2 | 0 | SIMPLE COMMUNICATIONS LIMITED |
| AS213534 | Other Business | 2 | 0 | Gardners Books Ltd |
| AS21371 | Hosting Provider | 2 | 0 | EQUINIX (SERVICES) LIMITED |
| AS213888 | Hosting Provider | 2 | 0 | CharterDigital Ltd |
| AS213905 | Other Business | 2 | 0 | ISPLABS LIMITED |
| AS213921 | Other Business | 2 | 0 | DAVID ASCOTT MOTORS LTD |
| AS214056 | Hosting Provider | 2 | 0 | Future Technology Group Ltd |
| AS214228 | Other Business | 2 | 0 | Freepoint Commodities Europe LLP |
| AS214260 | ISP & Mobile | 2 | 0 | I.T Communications Limited |
| AS214453 | Other Business | 2 | 0 | Beon Core Ltd |
| AS21448 | ISP & Mobile | 2 | 0 | Integrated Digital Services Ltd |
| AS214557 | Hosting Provider | 2 | 0 | HOSTMENOW LTD |
| AS214661 | Hosting Provider | 2 | 0 | ALICE NETWORKS LTD |
| AS21470 | ISP & Mobile | 2 | 0 | South West Communications Group Ltd |
| AS214722 | Other Business | 2 | 0 | Lighthouse Global Europe Limited |
| AS214861 | Other Business | 2 | 0 | CloudExa-Hosting LTD |
| AS215187 | Other Business | 2 | 0 | God Promised Me Networks LTD |
| AS215657 | Other Business | 2 | 0 | Hachette UK Limited |
| AS215662 | Other Business | 2 | 0 | KENSINGTON MORTGAGE COMPANY LIMITED |
| AS215675 | Hosting Provider | 2 | 0 | Perception TVCDN Ltd |
| AS215742 | Other Business | 2 | 0 | Duplia Ltd |
| AS215854 | ISP & Mobile | 2 | 0 | Exponential-E Ltd. |
| AS215981 | ISP & Mobile | 2 | 0 | X-Fibre Ltd |
| AS216026 | Other Business | 2 | 0 | Smart Technology Advisers Ltd |
| AS216338 | ISP & Mobile | 2 | 0 | INTELEGRO LIMITED |
| AS216361 | Other Business | 2 | 0 | Next Internet Network Ltd |
| AS24633 | Other Business | 2 | 0 | BCN Group Hosting Ltd |
| AS24705 | ISP & Mobile | 2 | 0 | Single Mode Networks Ltd |
| AS24775 | Other Business | 2 | 0 | Qinetiq Limited |
| AS25462 | ISP & Mobile | 2 | 0 | RETN Limited |
| AS25546 | Other Business | 2 | 0 | Brookland Computer Services Limited |
| AS25585 | ISP & Mobile | 2 | 0 | Kencomp Internet Ltd |
| AS28780 | Other Business | 2 | 0 | Flooid limited |
| AS28914 | ISP & Mobile | 2 | 0 | Wireless Logic Limited |
| AS29626 | Government | 2 | 0 | Staffordshire County Council |
| AS29754 | Other Business | 2 | 0 | Qube Research and Technologies Limited |
| AS30756 | Other Business | 2 | 0 | Travelport International Limited |
| AS30909 | ISP & Mobile | 2 | 0 | Fastvision Limited |
| AS31003 | Other Business | 2 | 0 | Iron Mountain Europe (Group) Limited |
| AS31223 | Other Business | 2 | 0 | Electronic Arts Limited |
| AS31256 | Government | 2 | 0 | Warwickshire County Council |
| AS31659 | Hosting Provider | 2 | 0 | Below Zero Hosting Ltd. |
| AS3252 | Other Business | 2 | 0 | Fiberax Networking&Cloud Ltd. |
| AS33981 | Other Business | 2 | 0 | Total System Services Processing Europe Limited |
| AS34099 | Other Business | 2 | 0 | Road Tech Computer Systems Ltd. |
| AS34625 | Hosting Provider | 2 | 0 | OSHS Ltd |
| AS34697 | Other Business | 2 | 0 | Emerson Electric UK Limited |
| AS34745 | Other Business | 2 | 0 | TeleWare Hosted Services Ltd. |
| AS34930 | ISP & Mobile | 2 | 0 | LHR AIRPORTS LIMITED |
| AS39173 | Other Business | 2 | 0 | SS&C FINANCIAL SERVICES INTERNATIONAL LIMITED |
| AS39382 | Hosting Provider | 2 | 0 | Optinium Ltd |
| AS39389 | Other Business | 2 | 0 | Gibson Thomas Rental Ltd |
| AS39400 | Government | 2 | 0 | London Borough of Hackney |
| AS39592 | Other Business | 2 | 0 | Benjamin Ashton |
| AS39875 | ISP & Mobile | 2 | 0 | Zycomm Electronics Limited |
| AS401568 | Other Business | 2 | 0 | MEMILUS CREATIVE LLC |
| AS401626 | Hosting Provider | 2 | 0 | Netiface America, Inc. |
| AS40992 | Other Business | 2 | 0 | Marex Financial Ltd |
| AS41367 | Other Business | 2 | 0 | Wood Group UK Limited |
| AS41538 | Other Business | 2 | 0 | Inspired Gaming (UK) Limited |
| AS41570 | Other Business | 2 | 0 | BFBS |
| AS41596 | Other Business | 2 | 0 | Willis Group Services Ltd |
| AS41839 | Other Business | 2 | 0 | Concentrix Europe Limited |
| AS42053 | Other Business | 2 | 0 | Starling Bank Limited |
| AS42635 | Hosting Provider | 2 | 0 | CARDOCK HOSTING LIMITED |
| AS42853 | ISP & Mobile | 2 | 0 | HGC Global Communications (UK) Limited |
| AS43178 | ISP & Mobile | 2 | 0 | Technolabs Networks Ltd. |
| AS43259 | Other Business | 2 | 0 | Leidos Innovations UK LTD |
| AS43486 | Other Business | 2 | 0 | Mizuho Bank Ltd |
| AS43669 | Other Business | 2 | 0 | Axia Computer Systems Limited |
| AS44480 | Other Business | 2 | 0 | Brevan Howard Asset Management LLP |
| AS44791 | Other Business | 2 | 0 | AVMI KINLY LTD |
| AS47535 | ISP & Mobile | 2 | 0 | JAVELIN BROADBAND LIMITED |
| AS47571 | Hosting Provider | 2 | 0 | Digital Craftsmen Ltd. |
| AS47581 | Other Business | 2 | 0 | NSFOCUS Technologies UK Limited |
| AS47611 | Other Business | 2 | 0 | Warner Music International Services Limited |
| AS47797 | Government | 2 | 0 | Essex County Council |
| AS47823 | Other Business | 2 | 0 | Netwise Hosting Ltd |
| AS48397 | ISP & Mobile | 2 | 0 | Unipart Group Limited |
| AS48682 | Other Business | 2 | 0 | IP Space Limited |
| AS48761 | Hosting Provider | 2 | 0 | Maxinames Ltd |
| AS48967 | Other Business | 2 | 0 | Cboe Europe Limited |
| AS49313 | Hosting Provider | 2 | 0 | Seva-Host Ltd |
| AS49401 | ISP & Mobile | 2 | 0 | Bink Group Ltd |
| AS49607 | Other Business | 2 | 0 | ZEMPLER BANK LIMITED |
| AS49882 | Other Business | 2 | 0 | Paysafe Holdings UK Limited |
| AS49958 | Other Business | 2 | 0 | Evolution Gaming LTD |
| AS50078 | Other Business | 2 | 0 | X-ON HEALTH LIMITED |