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 |
|---|---|---|---|---|
| AS50287 | Other Business | 2 | 1 | Audatex (UK) Ltd |
| AS50419 | Other Business | 2 | 1 | Eye Pea Ltd. |
| AS51704 | Education | 2 | 1 | South West Grid for Learning Trust Ltd. |
| AS52063 | Other Business | 2 | 1 | TTP Cloud Group Ltd |
| AS5586 | ISP & Mobile | 2 | 1 | Verizon UK Limited |
| AS57907 | ISP & Mobile | 2 | 1 | CloudConnX Limited |
| AS59410 | ISP & Mobile | 2 | 1 | Barritel Ltd |
| AS59659 | Other Business | 2 | 1 | Securus Communications Ltd. |
| AS59717 | Other Business | 2 | 1 | Arco Limited |
| AS59876 | Other Business | 2 | 1 | Thomas James Elliott |
| AS60377 | ISP & Mobile | 2 | 1 | toob limited |
| AS8330 | Other Business | 2 | 1 | LONAP Ltd |
| AS8356 | Other Business | 2 | 1 | PRT Systems Limited |
| AS8838 | Hosting Provider | 2 | 1 | Compuweb Communications Services Limited |
| AS9540 | Other Business | 2 | 1 | VELOCIX LIMITED |
| AS133782 | Other Business | 2 | 0 | Elsevier Ltd |
| AS15654 | Other Business | 2 | 0 | Civica UK Ltd. |
| AS15865 | Other Business | 2 | 0 | Elliott Advisors UK (Ltd) |
| AS16334 | Other Business | 2 | 0 | Sureline Communications Limited |
| AS197283 | Government | 2 | 0 | PowerRDP Network LTD |
| AS197342 | Other Business | 2 | 0 | PERSISTENT SYSTEMS UK LIMITED |
| AS197407 | Other Business | 2 | 0 | CHINA UNICOM (EUROPE) OPERATIONS LIMITED |
| AS197560 | Hosting Provider | 2 | 0 | Beeks Financial Cloud Ltd |
| AS197622 | Other Business | 2 | 0 | NEXTTRANSLATE LTD |
| AS198032 | Education | 2 | 0 | Cambridge Assessment |
| AS198142 | Government | 2 | 0 | Warrington Borough Council |
| AS198220 | Hosting Provider | 2 | 0 | Rackspace Ltd. |
| AS198426 | ISP & Mobile | 2 | 0 | Voneus Ltd |
| AS198652 | Hosting Provider | 2 | 0 | Selectel LTD |
| AS198957 | ISP & Mobile | 2 | 0 | System Force I.T. Ltd |
| AS199301 | Other Business | 2 | 0 | RLE SOLUTIONS LTD |
| AS199379 | Other Business | 2 | 0 | Markerstudy Insurance Services Limited |
| AS199706 | Other Business | 2 | 0 | Block Solutions Ltd |
| AS199720 | Other Business | 2 | 0 | ICBC Standard Bank PLC |
| AS199828 | Other Business | 2 | 0 | NUSO CLOUD UK LIMITED |
| AS199886 | Other Business | 2 | 0 | Shetland Broadband LLP |
| AS200682 | Other Business | 2 | 0 | Trustees of the London Clinic Limited |
| AS201024 | Hosting Provider | 2 | 0 | DATAWEB GLOBAL LP. |
| AS201226 | Other Business | 2 | 0 | Leasing Options Limited |
| AS201478 | Other Business | 2 | 0 | Refinitiv Limited |
| AS201493 | Other Business | 2 | 0 | Noble Systems UK Ltd |
| AS201773 | Education | 2 | 0 | University of Warwick |
| AS202052 | Other Business | 2 | 0 | CTS Group Ltd |
| AS202067 | Other Business | 2 | 0 | Advantex Network Solutions Ltd |
| AS202149 | Government | 2 | 0 | Comcast International Holdings UK Limited |
| AS202574 | Other Business | 2 | 0 | VLE LIMITED |
| AS202595 | Other Business | 2 | 0 | Squiz UK Limited |
| AS203011 | Hosting Provider | 2 | 0 | OSG CLOUD LIMITED |
| AS203036 | Other Business | 2 | 0 | THREDD UK LIMITED |
| AS203107 | Other Business | 2 | 0 | GEMINI PAYMENTS UK, LTD |
| AS203184 | Other Business | 2 | 0 | FNZ HOLDINGS UK LIMITED |
| AS203354 | Other Business | 2 | 0 | Viewsat ltd. |
| AS203652 | Other Business | 2 | 0 | IBM United Kingdom Limited |
| AS203767 | Hosting Provider | 2 | 0 | Claritas Solutions Limited |
| AS203795 | Other Business | 2 | 0 | FIDELIS MARKETING LIMITED |
| AS203812 | Hosting Provider | 2 | 0 | High Availability Hosting Limited |
| AS203842 | Other Business | 2 | 0 | Acora Limited |
| AS203987 | Other Business | 2 | 0 | Vysiion Limited |
| AS204204 | Other Business | 2 | 0 | Point72 UK Limited |
| AS204624 | Other Business | 2 | 0 | Sycurio Limited |
| AS204945 | Other Business | 2 | 0 | Celebrus Technologies plc |
| AS204978 | Hosting Provider | 2 | 0 | LOBOS NETWORKING LTD |
| AS205294 | Other Business | 2 | 0 | Thermo Electron Ltd |
| AS205359 | Other Business | 2 | 0 | Precisely Software Ltd |
| AS205402 | Other Business | 2 | 0 | Intercity Technology Ltd |
| AS205502 | Hosting Provider | 2 | 0 | Inception Hosting Limited |
| AS205545 | Other Business | 2 | 0 | JIWA Holdings Ltd |
| AS205900 | ISP & Mobile | 2 | 0 | APC Solutions UK Ltd |
| AS206143 | Hosting Provider | 2 | 0 | Networked Creativity LLP |
| AS206166 | Other Business | 2 | 0 | Schroder Investment Management Limited |
| AS206223 | Other Business | 2 | 0 | Teledyne Limited |
| AS206357 | Other Business | 2 | 0 | Aldermore Bank PLC |
| AS206490 | Government | 2 | 0 | Southend-on-Sea City Council |
| AS206798 | Other Business | 2 | 0 | HUAWEI TECHNOLOGIES(UK)CO.,LTD |
| AS206870 | Other Business | 2 | 0 | Brightcloud Ltd |
| AS207173 | Other Business | 2 | 0 | Northrop Grumman UK Limited |
| AS207194 | Other Business | 2 | 0 | Total Computer Services Ltd |
| AS207520 | Other Business | 2 | 0 | ExodusPoint Capital Management UK, LLP |
| AS207900 | Other Business | 2 | 0 | Northrop Grumman UK Limited |
| AS208026 | Other Business | 2 | 0 | LITTLEWOODS LTD |
| AS208417 | Other Business | 2 | 0 | SECUREEND LTD |
| AS208564 | Other Business | 2 | 0 | Bedroq Limited |
| AS208638 | Other Business | 2 | 0 | Mimecast Services Limited |
| AS208756 | Other Business | 2 | 0 | ALCON TELECOM LTD |
| AS209260 | Hosting Provider | 2 | 0 | SERVA ONE LTD |
| AS209413 | Other Business | 2 | 0 | DEDIK SERVICES LIMITED |
| AS209765 | Other Business | 2 | 0 | ASPIRE MEDIA GROUP LIMITED |
| AS210253 | Hosting Provider | 2 | 0 | Creative Network Consulting Limited |
| AS210282 | Other Business | 2 | 0 | Frontier Technology Limited |
| AS210310 | ISP & Mobile | 2 | 0 | Daisy Communications Ltd |
| AS210404 | Other Business | 2 | 0 | Tunstall Healthcare (UK) Limited |
| AS210415 | Hosting Provider | 2 | 0 | LOBOS NETWORKING LTD |
| AS210450 | Government | 2 | 0 | BARTS HEALTH NHS TRUST |
| AS211020 | Hosting Provider | 2 | 0 | LOBOS NETWORKING LTD |
| AS211077 | Government | 2 | 0 | UK Home Office (The Secretary of State for the Home Department) |
| AS211393 | Other Business | 2 | 0 | Vitrifi Limited |
| 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. |