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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
The largest autonomous systems registered to United Kingdom by IPv4 footprint.
United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| — |
| 1 |
| AS212733GB | Netquirk Netquirk Limited | 256 | — | 1 |
| AS211339GB | VORTIA Vortia Ltd | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS61283GB | MILLAR Andrew Millar Ltd | 256 | 1 | 2 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS215303GB | Qubitbytes Qubitbytes LTD | 256 | — | 1 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS211289GB | JOSH Joshua Leahy | 256 | 524.3K | 2 |
| AS200251GB | cwg Cineworld Cinemas Limited | 256 | — | 1 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS47219GB | NTT_GDC_Anycast NTT Global Data Centers EMEA UK Ltd. | 256 | 1 | 2 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS212195GB | nexstor-as Nexstor Ltd | 256 | — | 1 |
| AS49448GB | PICO_UK PICO GLOBAL LTD. | 256 | — | 1 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS60223GB | NETIFACE-AS Netiface Limited | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS212868GB | GLITCH-SERVERS CHAPMAN Adam | 256 | 1 | 2 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS200416GB | BG-MED Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS57770GB | ECHOINTERNET Echo Internet Limited | 256 | — | 1 |
| AS39717GB | POLESTAR-AS Polestar Ltd | 256 | — | 1 |
| AS47744GB | ANNECTO-AS XTEND SOLUTIONS LTD | 256 | — | 1 |
| AS216121GB | VALKYRIEHOSTING-AS Valkyrie Hosting LTD | 256 | — | 1 |
| AS216036GB | TOTALCOMMS-AS Signal Telecom Ltd | 256 | — | 1 |
| AS199716GB | Bletchley-Networks-Limited Bletchley Networks Limited | 256 | — | 1 |
| AS205676GB | DCE Data Center Experts LTD | 256 | — | 1 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS42359GB | WEMBLEY-AS The Football Association Ltd. | 256 | — | 1 |
| AS15992GB | VISA-EUROPE Visa Europe Limited | 256 | — | 1 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS209540GB | EXPEDIA-DUBLIN Expedia.com Ltd. | 256 | — | 1 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS200950GB | CalibourNetwork Calibour Limited | 256 | 817 | 8 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS60735GB | DELIGHTVPS-AS Konstantin Verba | 256 | 77.8K | 5 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |