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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 | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 256 |
| — |
| 1 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS202400GB | TAIPEI101-NETWORK-LLC TAIPEI101 NETWORK LTD | 256 | 6 | 7 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS208393GB | DEDCLOUD Dedcloud Network Ltd | 256 | 2 | 3 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS201357GB | DPNET-FAST DPNET FAST RELIABLE HOSTING VPS CLOUD SOLUTIONS LTD | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS213618GB | ORG-OCL38-RIPE ONESHOME COMMUNICATIONS LTD | 256 | 2.9M | 11 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS199535GB | com Bet Invest LTD | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS49793GB | IAIN-MCWILLIAMS-AS LMP Technical Services Ltd | 256 | 1 | 2 |
| AS202275GB | GTSUK-AS Gaming Technology Solutions Ltd. | 256 | 1 | 2 |
| AS197958GB | Ogilvie-Communications NET DEFENCE LIMITED | 256 | — | 1 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS214294GB | NoobNet NOOB RP LTD | 256 | 2 | 3 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS12613GB | FIREBRICK-AS Firebrick Limited | 256 | — | 1 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS210938GB | whitbread Whitbread Group PLC | 256 | — | 1 |
| AS49448GB | PICO_UK PICO GLOBAL LTD. | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS201765GB | NECTMANIA-AS NECTMANIA NETWORK LIMITED | 256 | 512 | 3 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS214637GB | Online-Projects-AS Online Projects LTD | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS51047GB | TURTLE-NET Turtle Networks Ltd | 256 | — | 1 |
| AS211409GB | PrimeFilter FoxiBytes LTD | 256 | — | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS199649GB | KTSTECH-AS KTS Technology Group Limited | 256 | 1 | 2 |
| AS208098GB | GPS THREDD UK LIMITED | 256 | — | 1 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |