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 |
|---|---|---|---|---|
| AS49448 | Other Business | 1 | 0 | PICO GLOBAL LTD. |
| AS49503 | Other Business | 1 | 0 | MAINFRAME & CYBERNETIC SYSTEMS LIMITED |
| AS49606 | Other Business | 1 | 0 | MCD Europe Limited |
| AS49728 | Government | 1 | 0 | Herefordshire Council |
| AS49781 | ISP & Mobile | 1 | 0 | Broadband for Rural Kent Ltd |
| AS49868 | Other Business | 1 | 0 | ANITE TRAVEL Ltd |
| AS49967 | Other Business | 1 | 0 | THAMES VALLEY HOUSING ASSOCIATION LIMITED |
| AS49978 | Other Business | 1 | 0 | NIUM SYSTEMS UK LIMITED |
| AS50063 | Other Business | 1 | 0 | Sainsbury's Supermarkets Ltd |
| AS50108 | Other Business | 1 | 0 | Electronic Arts Limited |
| AS50632 | Other Business | 1 | 0 | Fish.Net Limited |
| AS50826 | Other Business | 1 | 0 | Moelis & Company UK LLP |
| AS50882 | Other Business | 1 | 0 | Maxnett Ltd. |
| AS50888 | ISP & Mobile | 1 | 0 | Minotaur I.T. Limited |
| AS50972 | Other Business | 1 | 0 | Jamie Oliver Ltd. |
| AS50985 | Other Business | 1 | 0 | Electronic Arts Limited |
| AS51005 | Other Business | 1 | 0 | 4D Interactive Ltd |
| AS51047 | Hosting Provider | 1 | 0 | Turtle Networks Ltd |
| AS51221 | Other Business | 1 | 0 | LMAX Limited |
| AS51303 | Other Business | 1 | 0 | IQVIA SOLUTIONS HQ LTD |
| AS51498 | Other Business | 1 | 0 | CONNECTION NETWORKS L.P. |
| AS51572 | Other Business | 1 | 0 | Cerulean Solutions Limited |
| AS51766 | Government | 1 | 0 | Merseyside Fire and Rescue Service |
| AS51926 | Other Business | 1 | 0 | PageOne Communications Ltd |
| AS51946 | Education | 1 | 0 | University of Newcastle upon Tyne |
| AS51953 | Other Business | 1 | 0 | Sagentia Ltd |
| AS51983 | Other Business | 1 | 0 | Sargasso N1 Limited |
| AS52024 | ISP & Mobile | 1 | 0 | KWIK-FIT (GB) Limited |
| AS53335 | Other Business | 1 | 0 | BlueCrest Capital Management LP |
| AS5464 | Hosting Provider | 1 | 0 | ZURICH DATACENTER LTD |
| AS56365 | Other Business | 1 | 0 | CME Operations Limited |
| AS56438 | ISP & Mobile | 1 | 0 | Loop Scorpio Ltd |
| AS56723 | Other Business | 1 | 0 | Electronic Arts Limited |
| AS56739 | Other Business | 1 | 0 | PRT Systems Limited |
| AS56929 | Government | 1 | 0 | WANDSWORTH-BOROUGH-COUNCIL |
| AS57161 | ISP & Mobile | 1 | 0 | Netcalibre Ltd |
| AS57377 | Government | 1 | 0 | LONDON BOROUGH OF MERTON |
| AS57408 | Other Business | 1 | 0 | Reed Smith LLP |
| AS57477 | ISP & Mobile | 1 | 0 | Monsternet Highland Ltd |
| AS57586 | Other Business | 1 | 0 | TOURLINK ORGANIZATION LLP |
| AS57770 | Hosting Provider | 1 | 0 | Echo Internet Limited |
| AS57850 | Other Business | 1 | 0 | Northumbrian Water Ltd |
| AS58007 | Hosting Provider | 1 | 0 | Witine Limited |
| AS58117 | Other Business | 1 | 0 | TouchTec Technology Limited |
| AS58226 | Other Business | 1 | 0 | Phusion IM Limited |
| AS59621 | Hosting Provider | 1 | 0 | Flo Networks Limited |
| AS59638 | Other Business | 1 | 0 | Robert Mitchelmore |
| AS59660 | Other Business | 1 | 0 | DataArt Technologies UK Ltd |
| AS59756 | Other Business | 1 | 0 | Enquest Britain Limited |
| AS59783 | Other Business | 1 | 0 | ONESAVINGS BANK PLC |
| AS59809 | Other Business | 1 | 0 | Numeric Futures Limited |
| AS59902 | Other Business | 1 | 0 | IQVIA SOLUTIONS HQ LTD |
| AS59904 | Other Business | 1 | 0 | LANCASHIRE INSURANCE SERVICES LTD |
| AS60012 | Hosting Provider | 1 | 0 | vXtream Ltd |
| AS60102 | Other Business | 1 | 0 | Sova Capital Limited |
| AS60220 | Other Business | 1 | 0 | Electronic Arts Limited |
| AS60223 | Hosting Provider | 1 | 0 | Netiface Limited |
| AS60237 | Other Business | 1 | 0 | WEST BROMWICH BUILDING SOCIETY FOUNDATION |
| AS60282 | Government | 1 | 0 | Coventry City Council |
| AS60333 | Education | 1 | 0 | The University of Manchester |
| AS60339 | ISP & Mobile | 1 | 0 | Hutchison 3G UK Limited |
| AS60688 | Other Business | 1 | 0 | CSP Partnership |
| AS60698 | Other Business | 1 | 0 | Linx-Networks-UK Ltd |
| AS60758 | Other Business | 1 | 0 | Deluxe UK Holdings Limited |
| AS60760 | Other Business | 1 | 0 | Experian Ltd |
| AS60914 | ISP & Mobile | 1 | 0 | Telecoms Consortium Ltd. |
| AS60925 | Education | 1 | 0 | BPP Services Limited |
| AS60933 | Other Business | 1 | 0 | QUALCOMM (UK) LIMITED |
| AS60977 | Other Business | 1 | 0 | NVIDIA Ltd |
| AS61281 | Other Business | 1 | 0 | Chess Limited |
| AS61427 | Other Business | 1 | 0 | Sargasso N1 Limited |
| AS62112 | Other Business | 1 | 0 | XConnect Services Limited |
| AS62374 | Other Business | 1 | 0 | Andy Mace |
| AS8272 | Hosting Provider | 1 | 0 | Claranet Limited |
| AS8577 | Other Business | 1 | 0 | XYGNITION RESEARCH LIMITED |
| AS8789 | Other Business | 1 | 0 | TELEFONICA TECH NORTHERN IRELAND LIMITED |
| AS9014 | Government | 1 | 0 | Centre for Environment Fisheries and Aquaculture Science (CEFAS) |
| AS9161 | Other Business | 1 | 0 | Poundbury Systems Ltd. |
| AS214731 | ISP & Mobile | 0 | 43 | ETO Networks Limited |
| AS58339 | Other Business | 0 | 33 | MARIA STYLE LTD |
| AS213507 | ISP & Mobile | 0 | 29 | SKYQUANTUM TELECOM LTD. |
| AS207529 | Other Business | 0 | 19 | NYANLOLI LTD |
| AS204789 | Other Business | 0 | 18 | BIZBETA LTD |
| AS211035 | Hosting Provider | 0 | 17 | PHANTOM HIVE NETWORK LTD |
| AS212483 | ISP & Mobile | 0 | 16 | LEVEL EIGHTY-SIX COMMUNICATIONS LTD |
| AS209022 | Other Business | 0 | 15 | Tschajera Limited |
| AS200455 | Other Business | 0 | 13 | HOTARU NETWORK LTD. |
| AS213092 | Other Business | 0 | 13 | Acrion International Limited |
| AS216126 | Other Business | 0 | 13 | James Ledger |
| AS47509 | Other Business | 0 | 12 | Wai-Wah Tang |
| AS51939 | Other Business | 0 | 10 | Terra Management Consulting Ltd |
| AS199519 | Other Business | 0 | 9 | Jack Brierley |
| AS214242 | Other Business | 0 | 9 | Jiaxing Xing |
| AS215527 | Hosting Provider | 0 | 8 | Xero Networks LTD |
| AS204291 | Other Business | 0 | 7 | Thomas McLoughlin |
| AS208699 | Other Business | 0 | 7 | Leo Shum |
| AS207268 | Other Business | 0 | 6 | STRATEGIC EXPLORATIONS LTD |
| AS214749 | Other Business | 0 | 6 | James Cahill |
| AS25085 | Other Business | 0 | 6 | ALUE LTD |
| AS56758 | Other Business | 0 | 6 | Cr0bar Limited |