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 |
|---|---|---|---|---|
| AS212171 | Other Business | 5 | 0 | Local NCC Ltd. |
| AS21346 | Other Business | 5 | 0 | Enterprise Services Information Security UK Limited |
| AS213790 | Hosting Provider | 5 | 0 | Limited Network LTD |
| AS215304 | Other Business | 5 | 0 | SOLREN LIMITED |
| AS215429 | Other Business | 5 | 0 | IQVIA SOLUTIONS HQ LTD |
| AS215468 | Other Business | 5 | 0 | LOCKBOX NETWORKS LLP |
| AS215674 | Other Business | 5 | 0 | Brookplus Limited |
| AS216167 | Other Business | 5 | 0 | Gamma Telecom Holdings Ltd |
| AS216180 | Hosting Provider | 5 | 0 | WHG Hosting Services Ltd |
| AS28863 | Other Business | 5 | 0 | Thales UK Limited |
| AS28959 | Other Business | 5 | 0 | Vitol Services Ltd |
| AS29214 | Government | 5 | 0 | THE HOUSE OF COMMONS |
| AS29646 | Other Business | 5 | 0 | FFastFill Europe Limited |
| AS30938 | Other Business | 5 | 0 | ahbr company limited |
| AS31050 | Other Business | 5 | 0 | The Framestore Limited |
| AS3232 | Other Business | 5 | 0 | ModernColo LP |
| AS34350 | Other Business | 5 | 0 | Man Investments Limited |
| AS34499 | Hosting Provider | 5 | 0 | BlackBox Hosting Ltd |
| AS34914 | Other Business | 5 | 0 | Syntec LTD |
| AS34922 | Other Business | 5 | 0 | CSC Administrative Services Limited |
| AS34979 | Other Business | 5 | 0 | 39D Services LTD |
| AS35707 | Other Business | 5 | 0 | Scottish Power UK PLC |
| AS35832 | Government | 5 | 0 | Birmingham City Council |
| AS39584 | Other Business | 5 | 0 | Legal & General Investment Management Holdings Ltd |
| AS39633 | Hosting Provider | 5 | 0 | COMPUTER SYSTEMS INTEGRATION GROUP LIMITED |
| AS39846 | Other Business | 5 | 0 | Onega Ltd |
| AS44369 | ISP & Mobile | 5 | 0 | emPSN Services Limited |
| AS47549 | Hosting Provider | 5 | 0 | Hosting Systems Ltd |
| AS47563 | Other Business | 5 | 0 | Sports Information Services Limited |
| AS48444 | Other Business | 5 | 0 | Internet Ltd |
| AS49415 | Other Business | 5 | 0 | VTSL Ltd |
| AS49937 | Other Business | 5 | 0 | Interactive Sports Limited |
| AS50132 | Hosting Provider | 5 | 0 | 3nt solutions LLP |
| AS51159 | Other Business | 5 | 0 | CT1 Technologies Ltd |
| AS57148 | Hosting Provider | 5 | 0 | Bytehouse Ltd |
| AS60492 | Other Business | 5 | 0 | Mimecast Services Limited |
| AS62417 | Other Business | 5 | 0 | DIGITALK Limited |
| AS205804 | Other Business | 4 | 6 | Delta V Technologies Limited |
| AS211298 | Other Business | 4 | 5 | Driftnet Ltd |
| AS206069 | Other Business | 4 | 4 | Cornseed Limited |
| AS207841 | ISP & Mobile | 4 | 4 | Inferno Communications Ltd |
| AS208408 | Other Business | 4 | 4 | Karanyi Ltd |
| AS12775 | Hosting Provider | 4 | 3 | JPC Infonet Ltd |
| AS2818 | Other Business | 4 | 3 | BBC |
| AS60981 | ISP & Mobile | 4 | 3 | Triangle Networks Ltd |
| AS210206 | Other Business | 4 | 2 | Metro Security (GB) PLC |
| AS213451 | Other Business | 4 | 2 | Cilix Limited |
| AS213549 | Hosting Provider | 4 | 2 | SATISFYHOST LTD |
| AS215047 | Other Business | 4 | 2 | DSV Communications Limited |
| AS34816 | Other Business | 4 | 2 | Anschutz Sports Holdings Limited |
| AS41281 | Other Business | 4 | 2 | KeFF Networks Ltd |
| AS50173 | Other Business | 4 | 2 | GTT - EMEA Ltd. |
| AS58101 | Hosting Provider | 4 | 2 | Gladserv Limited |
| AS59676 | Other Business | 4 | 2 | Network Services Ltd. |
| AS60011 | Hosting Provider | 4 | 2 | Mythic Beasts Ltd |
| AS8916 | Hosting Provider | 4 | 2 | Portfast Ltd |
| AS9115 | Hosting Provider | 4 | 2 | Hostpapa UK Ltd. |
| AS12519 | ISP & Mobile | 4 | 1 | FastNet International Ltd |
| AS198312 | Other Business | 4 | 1 | Spectra Group (uk) Ltd |
| AS199516 | ISP & Mobile | 4 | 1 | PACKNET LIMITED |
| AS201933 | Other Business | 4 | 1 | 4net Technologies Ltd |
| AS202114 | Hosting Provider | 4 | 1 | Blue Sky Systems Limited |
| AS203416 | ISP & Mobile | 4 | 1 | I.T Communications Limited |
| AS204558 | ISP & Mobile | 4 | 1 | Odyssey Systems Ltd |
| AS204562 | ISP & Mobile | 4 | 1 | JAVELIN BROADBAND LIMITED |
| AS205739 | ISP & Mobile | 4 | 1 | Allness IT Ltd |
| AS207096 | Other Business | 4 | 1 | Link Web Solutions LLP |
| AS207163 | ISP & Mobile | 4 | 1 | Sky UK Limited |
| AS207543 | Hosting Provider | 4 | 1 | DOWNUNDER GEOSOLUTIONS (LONDON) PTY LIMITED |
| AS20799 | Hosting Provider | 4 | 1 | Datanet.co.uk Ltd |
| AS208687 | ISP & Mobile | 4 | 1 | AllPoints Fibre Networks Limited |
| AS208765 | Other Business | 4 | 1 | Bullet Proof VPN Ltd |
| AS210062 | ISP & Mobile | 4 | 1 | Barritel Ltd |
| AS210805 | Other Business | 4 | 1 | Open Infra ltd |
| AS213229 | Hosting Provider | 4 | 1 | MITELIS SECURITY LIMITED |
| AS214285 | Other Business | 4 | 1 | Above Bar Cyber Limited |
| AS215128 | ISP & Mobile | 4 | 1 | IONLINE INTERNET SOLUTIONS PROVIDER LTD |
| AS215672 | Other Business | 4 | 1 | MoeChuang Network Limited |
| AS215925 | Hosting Provider | 4 | 1 | VPSVAULT.HOST LTD |
| AS216405 | Other Business | 4 | 1 | Metric Systems UK LTD |
| AS24594 | Other Business | 4 | 1 | Voiceflex Ltd |
| AS29164 | Hosting Provider | 4 | 1 | Iomart Group Plc |
| AS29452 | Other Business | 4 | 1 | Secura Hosting Ltd |
| AS30740 | ISP & Mobile | 4 | 1 | Exa Networks Limited |
| AS31084 | ISP & Mobile | 4 | 1 | MAGRATHEA TELECOMMUNICATIONS LIMITED |
| AS31493 | Hosting Provider | 4 | 1 | TWENTYTWENTYMEDIA LIMITED |
| AS31641 | ISP & Mobile | 4 | 1 | Atlas Communications (NI) Ltd |
| AS34134 | ISP & Mobile | 4 | 1 | FreeClix Ltd |
| AS34282 | Hosting Provider | 4 | 1 | Team Blue Carrier Limited |
| AS39602 | ISP & Mobile | 4 | 1 | The Cent.re Group Limited |
| AS41357 | Hosting Provider | 4 | 1 | 34SP.com Limited |
| AS42009 | Other Business | 4 | 1 | AVR Group Limited |
| AS42332 | Other Business | 4 | 1 | EKCO LONDON LIMITED |
| AS47716 | Hosting Provider | 4 | 1 | ISIX Communications LLP |
| AS48447 | Other Business | 4 | 1 | Sectigo Limited |
| AS48901 | Hosting Provider | 4 | 1 | DSNET Ltd |
| AS57750 | Hosting Provider | 4 | 1 | Synamedia Limited |
| AS59888 | Other Business | 4 | 1 | MARMIN Ltd |
| AS60193 | ISP & Mobile | 4 | 1 | Wurzel Ltd |
| AS61124 | ISP & Mobile | 4 | 1 | Marston's Telecoms Limited |