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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 12.3K |
| 65.5K |
| 27 |
| AS49823GB | Hastingwood Hastingwood Securities Ltd | 12.3K | — | 19 |
| AS204731GB | fibrenest FIBRENEST LIMITED | 12.3K | 70.1K | 27 |
| AS44307GB | MDSOL MDSOL EUROPE LTD | 12.5K | — | 25 |
| AS207461GB | host-industry HOSTING INDUSTRY LIMITED | 12.5K | 5 | 39 |
| AS204139GB | NEXTGLOBALSERVICES NEXT GLOBAL SERVICES L.P. | 12.5K | — | 24 |
| AS8943GB | JUMP Jump Networks Ltd | 12.5K | 327.7K | 12 |
| AS44356GB | EPSILON Epsilon Telecommunications Ltd | 12.5K | 196.6K | 32 |
| AS28690GB | ING-DIRECT-UK Barclays Bank PLC | 12.8K | — | 50 |
| AS204044GB | Onlyservers Packet Star Networks Limited | 12.8K | 65.5K | 16 |
| AS29452GB | SECURA-AS Secura Hosting Ltd | 12.8K | 65.5K | 5 |
| AS34931GB | AWARESOFT Awareness Software Limited | 12.8K | — | 9 |
| AS60672GB | SC ServerChoice Ltd | 12.8K | 196.6K | 26 |
| AS209693GB | OC-NETWORK OC NETWORKS LIMITED | 13.1K | 6 | 57 |
| AS57793GB | thirteenten 1310 Limited | 13.1K | 852K | 21 |
| AS206134GB | NEKO-AS NEKOBYTE INTERNATIONAL LIMITED | 13.1K | 12.3K | 55 |
| AS48266GB | Catixs Catixs Ltd | 13.1K | 471.1K | 80 |
| AS14670GB | WHG-USE1 WHG Hosting Services Ltd | 13.1K | — | 45 |
| AS33941GB | GCONNECT GConnect Technology Ltd | 13.1K | 65.5K | 8 |
| AS29527GB | ASTUTIUM-AS Astutium Limited | 13.3K | 1 | 12 |
| AS200260GB | Debugged-Network Debugged Ltd | 13.6K | 4.4K | 37 |
| AS20799GB | DATANET-AS Datanet.co.uk Ltd | 13.8K | 524.3K | 5 |
| AS49318GB | ARC-AS-UK TELEFONICA TECH UK MANAGED SERVICES LTD | 13.8K | — | 30 |
| AS212174GB | jola Jola Cloud Solutions Ltd | 13.8K | — | 23 |
| AS36454GB | WHG-DAL WHG Hosting Services Ltd | 14.1K | — | 51 |
| AS31472GB | VOICEHOST VoiceHost Ltd | 14.1K | 524.3K | 15 |
| AS34119GB | WILDCARD-AS Wildcard UK Limited | 14.1K | 589.8K | 17 |
| AS198736GB | StreamNetworks Stream Networks Ltd | 14.1K | 4.1K | 10 |
| AS201471GB | BIGSTEP-CLOUD Bigstep Cloud Limited | 14.3K | 129 | 13 |
| AS3213GB | BOGONS-ASN Bogons Ltd | 14.3K | 589.8K | 15 |
| AS5500GB | CHESS Chess ICT Ltd | 14.3K | 1.1M | 11 |
| AS199713GB | MLL-AS MLL Telecom Ltd. | 14.6K | — | 15 |
| AS201106GB | SPARTANHOST Spartan Host Ltd | 14.6K | — | 54 |
| AS39522GB | CONVERGED Converged Communication Solutions Limited | 14.8K | 524.3K | 20 |
| AS47638GB | CADENCE-AS Cadence Networks Ltd | 14.8K | 2.1M | 26 |
| AS34282GB | UKNOC-AS Team Blue Carrier Limited | 14.8K | 65.5K | 6 |
| AS29180GB | O2-ONLINE-AS Telefonica UK Limited | 14.8K | — | 23 |
| AS32708GB | ROOT-NETWORKS LoadEdge Limited | 14.8K | 1 | 26 |
| AS48294GB | CC-AS Spectrum Internet Ltd | 15.1K | — | 15 |
| AS58173GB | ONWAVE Onwave UK Ltd | 15.1K | — | 19 |
| AS43545GB | TELEDATA Teledata UK Limited | 15.1K | 65.5K | 19 |
| AS207645GB | FWNETWORKS-AS F & W Networks Ltd | 15.4K | 524.3K | 23 |
| AS60969GB | GetOnline GetOnline Limited | 15.4K | — | 8 |
| AS43599GB | NWEWN-AS Broadband N.I. Ltd. | 15.4K | — | 7 |
| AS216139GB | IRONHOST Iron Hosting Centre LTD | 15.6K | 3 | 64 |
| AS8902GB | IFB CCS Connectivity Limited | 15.6K | 65.5K | 6 |
| AS51048GB | NEXT-CONNEX WIFINITY LIMITED | 15.6K | 524.3K | 10 |