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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 |
| AS211118GB | SERMODK WORLDONE RESEARCH LIMITED | 256 | — | 1 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | 256 | — | 1 |
| AS204208GB | Peravix Peravix Group LTD | 256 | 272 | 3 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS202400GB | TAIPEI101-NETWORK-LLC TAIPEI101 NETWORK LTD | 256 | 6 | 7 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS49448GB | PICO_UK PICO GLOBAL LTD. | 256 | — | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS203109GB | ORG-AL1060-RIPE AeroFibre Ltd | 256 | — | 1 |
| AS213798GB | POWELL-AS Jude Gabriel Powell | 256 | 264 | 10 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS206573GB | Lonsys-uk London Systems UK Limited | 256 | — | 1 |
| AS199129GB | DIRECTCONNECT-AS Direct Connect (ISP) Ltd | 256 | — | 1 |
| AS47255GB | MCDEU02 MCD Europe Limited | 256 | — | 1 |
| AS204018GB | Cityfibre Cityfibre Limited | 256 | — | 1 |
| AS39717GB | POLESTAR-AS Polestar Ltd | 256 | — | 1 |
| AS42330GB | UNCHAINEDISP Unchained ISP Limited | 256 | 1 | 2 |
| AS212733GB | Netquirk Netquirk Limited | 256 | — | 1 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS213893GB | IPTR-AS IPTransit Business LTD | 256 | — | 1 |
| AS41380GB | ALD-AS Ald Automotive Ltd | 256 | — | 1 |
| AS201115GB | PYLONONE Pylon One Ltd | 256 | 512 | 2 |
| AS212031GB | BITSolutions-AS BIT Solutions Ltd | 256 | — | 1 |
| AS34640GB | NEX-CORP-UK CME Operations Limited | 256 | — | 1 |
| AS60977GB | NVIDIA-NGN NVIDIA Ltd | 256 | — | 1 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS57377GB | LONDON-BOROUGH-OF-MERTON LONDON BOROUGH OF MERTON | 256 | — | 1 |
| AS214188GB | VoltHosting VoltHosting Ltd | 256 | 256 | 2 |
| AS42479GB | KWW-UK-AS KLDiscovery Limited | 256 | — | 1 |
| AS198337GB | DATAART-LVIV DataArt Technologies UK Ltd | 256 | — | 1 |
| AS211067GB | LEC Eastbourne Borough Council | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS198628GB | FIDESSA-AS FIDESSA TRADING UK LIMITED | 256 | — | 1 |
| AS47219GB | NTT_GDC_Anycast NTT Global Data Centers EMEA UK Ltd. | 256 | 1 | 2 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS199492GB | EASYINTERNET Easy Internet Solutions Limited | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS211803GB | AS_INTER_ACT CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS203146GB | ORG-SF252-RIPE SwiftConnect Fiber LTD | 256 | — | 1 |
| AS214947GB | KAWEB Kaweb Limited | 256 | 524.3K | 2 |
| AS199948GB | EXPANSE-NETWORKS Cosmorack Ltd | 256 | 1 | 2 |
| AS213185GB | ETA-AS Eta Heese | 256 | 1 | 2 |
| AS215497GB | Tivarri Tivarri Limited | 256 | — | 1 |
| AS60933GB | QUALCO-IL QUALCOMM (UK) LIMITED | 256 | — | 1 |
| AS43059GB | iitss IT Support Services Team Limited | 256 | 1 | 2 |