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 |
|---|---|---|---|---|
| AS42044 | Other Business | 1 | 1 | CentralNic Ltd |
| AS42330 | ISP & Mobile | 1 | 1 | Unchained ISP Limited |
| AS43059 | Other Business | 1 | 1 | IT Support Services Team Limited |
| AS43131 | Other Business | 1 | 1 | Kay Net (UK) Ltd |
| AS43442 | Other Business | 1 | 1 | ProVu Communications Ltd |
| AS43851 | Other Business | 1 | 1 | Etheroute Ltd |
| AS43950 | Other Business | 1 | 1 | Terence Froy trading as "Spilsby Internet Solutions" |
| AS44009 | Hosting Provider | 1 | 1 | Rackspace Ltd. |
| AS44971 | Education | 1 | 1 | University of Kent |
| AS47219 | Other Business | 1 | 1 | NTT Global Data Centers EMEA UK Ltd. |
| AS47426 | Other Business | 1 | 1 | Advitel Ltd |
| AS47935 | Other Business | 1 | 1 | Quantum Communications Ltd |
| AS47988 | Other Business | 1 | 1 | Charles Allom |
| AS47998 | Other Business | 1 | 1 | Oscar Music & Media Ltd. |
| AS48686 | Hosting Provider | 1 | 1 | oRe Networks Limited |
| AS48987 | Other Business | 1 | 1 | Jiaxun Yang |
| AS49440 | Other Business | 1 | 1 | PLUSTEL LIMITED |
| AS49793 | Other Business | 1 | 1 | LMP Technical Services Ltd |
| AS51392 | Hosting Provider | 1 | 1 | Fusioned Ltd |
| AS56745 | Other Business | 1 | 1 | Kalnet4u Ltd |
| AS57138 | Other Business | 1 | 1 | LOCIX LIMITED |
| AS57650 | Other Business | 1 | 1 | Nomios UK&I Limited |
| AS57672 | Other Business | 1 | 1 | Daniel James Austin |
| AS58102 | Other Business | 1 | 1 | 2Dmedia Ltd. |
| AS59402 | Other Business | 1 | 1 | Virocom Limited |
| AS59439 | Other Business | 1 | 1 | EvolveIP LTD |
| AS59617 | Other Business | 1 | 1 | Andy Davidson |
| AS59730 | Other Business | 1 | 1 | StealthByte Network LTD |
| AS59813 | Other Business | 1 | 1 | Konstantin Verba |
| AS59897 | Other Business | 1 | 1 | Ekco Bournemouth Limited |
| AS60079 | Other Business | 1 | 1 | Electromagnetic Field Ltd. |
| AS60890 | Other Business | 1 | 1 | CentralNic Ltd |
| AS61283 | Other Business | 1 | 1 | Andrew Millar Ltd |
| AS61978 | Hosting Provider | 1 | 1 | York UK Hosting Ltd |
| AS62195 | Other Business | 1 | 1 | Stantec UK Limited |
| AS62227 | Other Business | 1 | 1 | EKCO CLOUD AND SECURITY LIMITED |
| AS62244 | Other Business | 1 | 1 | Watch Tower Bible and Tract Society of Britain |
| AS12613 | Other Business | 1 | 0 | Firebrick Limited |
| AS141387 | Other Business | 1 | 0 | Berkat Ltd |
| AS15601 | Other Business | 1 | 0 | Baring Investment Services Ltd |
| AS15752 | Other Business | 1 | 0 | BP International Ltd |
| AS15770 | Government | 1 | 0 | Durham County Council |
| AS15992 | Other Business | 1 | 0 | Visa Europe Limited |
| AS16238 | ISP & Mobile | 1 | 0 | Telecom2 Ltd. |
| AS16303 | Other Business | 1 | 0 | IPSwitch Networks Ltd |
| AS16351 | Other Business | 1 | 0 | George Vorres |
| AS196741 | Other Business | 1 | 0 | DataArt Technologies UK Ltd |
| AS196839 | Other Business | 1 | 0 | Amplefuture Group Limited |
| AS196902 | Government | 1 | 0 | Dudley Metropolitan Borough Council |
| AS196990 | Other Business | 1 | 0 | Shawbrook Bank Limited |
| AS197104 | Other Business | 1 | 0 | Gentoo Group Limited |
| AS197106 | Other Business | 1 | 0 | T. Rowe Price International LTD |
| AS197167 | Hosting Provider | 1 | 0 | Euralb Ltd |
| AS197173 | Other Business | 1 | 0 | HIGHLIGHT APPS LTD |
| AS197320 | Other Business | 1 | 0 | National Pharmacy Association Ltd |
| AS197355 | Other Business | 1 | 0 | Stratos Markets Limited |
| AS197360 | Other Business | 1 | 0 | 24Ping Ltd. |
| AS197370 | Government | 1 | 0 | Nottinghamshire County Council |
| AS197387 | Other Business | 1 | 0 | The Sporting Exchange (Clients) Ltd |
| AS197576 | Other Business | 1 | 0 | ZUMBAK LTD |
| AS197685 | Other Business | 1 | 0 | Onionring Limited |
| AS197958 | Other Business | 1 | 0 | NET DEFENCE LIMITED |
| AS198063 | Other Business | 1 | 0 | AWIN LTD |
| AS198075 | Other Business | 1 | 0 | BounceZero Ltd |
| AS198222 | Education | 1 | 0 | West Herts College |
| AS198231 | Other Business | 1 | 0 | Sixnet Operation Ltd |
| AS198243 | Other Business | 1 | 0 | GLOBAL ENTRY SOLUTIONS LTD |
| AS198337 | Other Business | 1 | 0 | DataArt Technologies UK Ltd |
| AS198353 | Other Business | 1 | 0 | Mimeo Limited |
| AS198466 | Other Business | 1 | 0 | J. MORBY |
| AS198472 | Government | 1 | 0 | Manchester City Council |
| AS198628 | Other Business | 1 | 0 | FIDESSA TRADING UK LIMITED |
| AS198789 | Other Business | 1 | 0 | Speedy IP Services LTD |
| AS198801 | Other Business | 1 | 0 | Your Housing Group Ltd |
| AS198850 | Other Business | 1 | 0 | WPP PRODUCTION LIMITED |
| AS198863 | Other Business | 1 | 0 | Cambridge University Press (Holdings) Limited |
| AS198892 | Other Business | 1 | 0 | MIXCLOUD LTD |
| AS199129 | ISP & Mobile | 1 | 0 | Direct Connect (ISP) Ltd |
| AS199131 | Government | 1 | 0 | City of York Council |
| AS199204 | ISP & Mobile | 1 | 0 | Webmate Internet Services Ltd. |
| AS199262 | Government | 1 | 0 | Transport for London |
| AS199385 | Other Business | 1 | 0 | Midland Press Ltd |
| AS199492 | Hosting Provider | 1 | 0 | Easy Internet Solutions Limited |
| AS199535 | Other Business | 1 | 0 | Bet Invest LTD |
| AS199548 | ISP & Mobile | 1 | 0 | UrSolutions Ltd |
| AS199716 | ISP & Mobile | 1 | 0 | Bletchley Networks Limited |
| AS199764 | Other Business | 1 | 0 | Electronic Arts Limited |
| AS199788 | Other Business | 1 | 0 | Motion Picture Solutions Limited |
| AS200052 | Hosting Provider | 1 | 0 | Feral.io Ltd |
| AS200113 | Hosting Provider | 1 | 0 | Global Servers LTD |
| AS200251 | Other Business | 1 | 0 | Cineworld Cinemas Limited |
| AS200304 | Other Business | 1 | 0 | Everyday Communications LTD |
| AS200468 | Other Business | 1 | 0 | ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP |
| AS200473 | Other Business | 1 | 0 | Samsung SDS Europe Ltd |
| AS200498 | Other Business | 1 | 0 | Perella Weinberg Partners UK LLP |
| AS200597 | Other Business | 1 | 0 | DIGITALK Limited |
| AS200692 | Other Business | 1 | 0 | KLDiscovery Limited |
| AS200709 | Other Business | 1 | 0 | Flotek Group Limited |
| AS201230 | Other Business | 1 | 0 | Peninsula Business Services Ltd |
| AS201261 | Other Business | 1 | 0 | The Watershed Arts Trust Ltd |