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 |
|---|---|---|---|---|
| AS203516 | Other Business | 3 | 0 | AltunHOST LTD |
| AS203614 | Other Business | 3 | 0 | NEXTTRANSLATE LTD |
| AS203861 | Other Business | 3 | 0 | Miteflux Technologies Ltd |
| AS204193 | Other Business | 3 | 0 | Gamma Telecom Holdings Ltd |
| AS204242 | ISP & Mobile | 3 | 0 | Trutec Services |
| AS204321 | Other Business | 3 | 0 | New York Times Limited |
| AS204777 | Other Business | 3 | 0 | telent Technology Services Ltd |
| AS205106 | Hosting Provider | 3 | 0 | Pea Soup Hosting Limited |
| AS205120 | Hosting Provider | 3 | 0 | Addooco IT Ltd |
| AS205309 | Other Business | 3 | 0 | Prodec Networks Ltd |
| AS205756 | Other Business | 3 | 0 | JAGUAR LAND ROVER AUTOMOTIVE PLC |
| AS205842 | Other Business | 3 | 0 | Link Web Solutions LLP |
| AS205944 | Other Business | 3 | 0 | ISAM FUNDS (UK) LIMITED |
| AS206187 | Other Business | 3 | 0 | Interactive Investor Services Limited |
| AS206246 | Other Business | 3 | 0 | FORMOSA CAPITAL LP |
| AS206372 | Other Business | 3 | 0 | Orca IT Ltd |
| AS206467 | Other Business | 3 | 0 | Protech Communications Ltd |
| AS206479 | Hosting Provider | 3 | 0 | AceRDP Ltd |
| AS206483 | Other Business | 3 | 0 | Red Matter Limited |
| AS206689 | Hosting Provider | 3 | 0 | Beeks Financial Cloud Ltd |
| AS207039 | Education | 3 | 0 | Satellite Applications Catapult Limited |
| AS207162 | Hosting Provider | 3 | 0 | L3C Limited |
| AS207511 | Other Business | 3 | 0 | London Stock Exchange PLC |
| AS207524 | Other Business | 3 | 0 | London Stock Exchange PLC |
| AS207827 | ISP & Mobile | 3 | 0 | CSL (DualCom) Limited |
| AS208118 | ISP & Mobile | 3 | 0 | N.I Technology Ltd. |
| AS208522 | Other Business | 3 | 0 | Optimus Networks LTD |
| AS209113 | Other Business | 3 | 0 | Precedence Technologies Ltd |
| AS209134 | Hosting Provider | 3 | 0 | Atmoso Limited |
| AS209452 | Other Business | 3 | 0 | Zuri Technologies Limited |
| AS209611 | ISP & Mobile | 3 | 0 | HFLBroadband Ltd |
| AS209761 | Government | 3 | 0 | North of England Commissioning Support Unit |
| AS210511 | Other Business | 3 | 0 | Direct Market Solutions Limited |
| AS210920 | Hosting Provider | 3 | 0 | Civo LTD |
| AS21099 | Other Business | 3 | 0 | Game Retail Ltd |
| AS211058 | Other Business | 3 | 0 | ThreatSpike Labs Limited |
| AS211500 | Hosting Provider | 3 | 0 | LOBOS NETWORKING LTD |
| AS211775 | Education | 3 | 0 | London Grid for Learning Trust |
| AS211955 | Hosting Provider | 3 | 0 | NOTBAD HOSTING LTD |
| AS212169 | Hosting Provider | 3 | 0 | CARDOCK HOSTING LIMITED |
| AS212240 | Other Business | 3 | 0 | RIK Networks Ltd |
| AS212406 | Other Business | 3 | 0 | TransFICC Ltd. |
| AS212413 | Government | 3 | 0 | Department for Work and Pensions |
| AS213183 | Hosting Provider | 3 | 0 | WHG Hosting Services Ltd |
| AS214351 | Other Business | 3 | 0 | FEMO IT SOLUTIONS LIMITED |
| AS214437 | Hosting Provider | 3 | 0 | NexGen Cloud Ltd |
| AS214467 | Hosting Provider | 3 | 0 | DIGIDED LTD |
| AS215286 | Hosting Provider | 3 | 0 | IXROOT LTD |
| AS216207 | Other Business | 3 | 0 | Newcastle City Council |
| AS216311 | Other Business | 3 | 0 | NORYLIX LTD |
| AS25022 | Other Business | 3 | 0 | TDM Group Limited |
| AS25030 | Other Business | 3 | 0 | National Farmers Union Mutual Insurance Society Ltd |
| AS25470 | ISP & Mobile | 3 | 0 | Neos Networks Limited |
| AS29045 | Other Business | 3 | 0 | IT Action Limited |
| AS30803 | Other Business | 3 | 0 | Trident Net Limited |
| AS31202 | Other Business | 3 | 0 | QUALCOMM (UK) LIMITED |
| AS31712 | Other Business | 3 | 0 | Gigastream Limited |
| AS33953 | Other Business | 3 | 0 | Experian International Unlimited |
| AS33967 | Government | 3 | 0 | Lancashire County Council |
| AS34344 | Other Business | 3 | 0 | Port Of Tilbury London Ltd |
| AS34934 | Other Business | 3 | 0 | ANS ACADEMY LIMITED |
| AS35437 | ISP & Mobile | 3 | 0 | Zone Telecommunications Ltd |
| AS35801 | Other Business | 3 | 0 | LION RE: SOURCES UK LIMITED |
| AS39060 | Other Business | 3 | 0 | Sainsbury's Supermarkets Ltd |
| AS39103 | Other Business | 3 | 0 | Moat Homes Limited |
| AS39552 | Other Business | 3 | 0 | WBA (IT Services) International Limited |
| AS39610 | Other Business | 3 | 0 | LCH Group Holdings Limited |
| AS41246 | ISP & Mobile | 3 | 0 | Electronic Media Services Ltd |
| AS41379 | Other Business | 3 | 0 | Nationwide Telephone Assistance Ltd |
| AS41415 | Other Business | 3 | 0 | Square Enix Limited |
| AS42457 | Hosting Provider | 3 | 0 | CARDOCK HOSTING LIMITED |
| AS43013 | ISP & Mobile | 3 | 0 | Communicate Technology LTD |
| AS43525 | Other Business | 3 | 0 | Oculon LLP |
| AS44052 | Other Business | 3 | 0 | ICONIC MEDIA SYSTEMS LIMITED |
| AS44548 | Other Business | 3 | 0 | CMC MARKETS PLC |
| AS44980 | Other Business | 3 | 0 | Paul Cairney |
| AS47296 | Other Business | 3 | 0 | HIFX EUROPE LIMITED |
| AS47582 | ISP & Mobile | 3 | 0 | ANSON NETWORK LIMITED |
| AS48090 | Other Business | 3 | 0 | TECHOFF SRV LIMITED |
| AS48412 | Other Business | 3 | 0 | Podsystem Limited |
| AS48553 | Other Business | 3 | 0 | Marketaxess Europe Ltd |
| AS49324 | Government | 3 | 0 | Nottingham City Council |
| AS49354 | ISP & Mobile | 3 | 0 | TANGO NETWORKS UK LTD |
| AS49372 | Other Business | 3 | 0 | w1n ltd |
| AS49487 | Other Business | 3 | 0 | IMBIL CONSULTANCY SERVICES LIMITED |
| AS49744 | Other Business | 3 | 0 | Intuit Ltd. |
| AS49829 | Other Business | 3 | 0 | ADM COMPUTER SERVICES LIMITED |
| AS49911 | Hosting Provider | 3 | 0 | CDN Squared Limited |
| AS50203 | Other Business | 3 | 0 | Reynolds and Reynolds Limited |
| AS50432 | Other Business | 3 | 0 | Natwest Markets PLC |
| AS50743 | Other Business | 3 | 0 | Commensus Limited |
| AS50746 | Other Business | 3 | 0 | Britannic Technologies Ltd |
| AS51707 | Government | 3 | 0 | Medway Towns Council |
| AS52200 | Other Business | 3 | 0 | M5 Limited |
| AS54470 | Other Business | 3 | 0 | Garden City Games Ltd |
| AS56444 | Hosting Provider | 3 | 0 | Atmoso Limited |
| AS56637 | Other Business | 3 | 0 | Fixnetix Ltd |
| AS57307 | ISP & Mobile | 3 | 0 | Communicate Technology LTD |
| AS58144 | Hosting Provider | 3 | 0 | THE STREAMING COMPANY.COM LIMITED |
| AS59445 | Other Business | 3 | 0 | ICC NETWORKS LTD |