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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 299 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.5M | 555 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET Jisc Services Limited | 7.2M | 222 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.9M | 80 |
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS43599GB | NWEWN-AS Broadband N.I. Ltd. | 15.4K | — | 7 |
| AS43545GB | TELEDATA Datum Datacentres Limited | 15.4K | 65.5K | 20 |
| AS58173GB | ONWAVE Onwave UK Ltd | 15.1K | — | 19 |
| AS39522GB | CONVERGED Converged Communication Solutions Limited | 15.1K | 524.3K | 21 |
| AS48294GB | CC-AS Spectrum Internet Ltd | 15.1K | — | 15 |
| AS34282GB | UKNOC-AS Team Blue Carrier Limited | 14.8K | 65.5K | 6 |
| AS47638GB | CADENCE-AS Cadence Networks Ltd | 14.8K | 2.1M | 26 |
| AS32708GB | ROOT-NETWORKS LoadEdge Limited | 14.8K | 1 | 26 |
| AS216047GB | INTECLOU-CDNK-NET INTECLOUD CDNK LTD | 14.6K | — | 39 |
| AS200260GB | Debugged-Network Debugged Ltd | 14.3K | 4.4K | 37 |
| AS201471GB | BIGSTEP-CLOUD Bigstep Cloud Limited | 14.3K | 129 | 13 |
| AS198736GB | StreamNetworks Stream Networks Ltd | 14.3K | 4.1K | 11 |
| AS201106GB | SPARTANHOST Spartan Host Ltd | 14.3K | — | 53 |
| AS3213GB | BOGONS-ASN Bogons Ltd | 14.3K | 589.8K | 15 |
| AS36454GB | WHG-DAL WHG Hosting Services Ltd | 14.1K | — | 51 |
| AS204339GB | FIRSTSERVER-FL-AS FIRST SERVER LIMITED | 14.1K | 2 | 57 |
| AS34119GB | WILDCARD-AS Wildcard UK Limited | 14.1K | 589.8K | 17 |
| AS31472GB | VOICEHOST VoiceHost Ltd | 14.1K | 524.3K | 15 |
| AS212174GB | jola Jola Cloud Solutions Ltd | 13.8K | — | 23 |
| AS20799GB | DATANET-AS Datanet.co.uk Ltd | 13.8K | 524.3K | 5 |
| AS49318GB | ARC-AS-UK Telefonica Tech UK Limited | 13.8K | — | 30 |
| AS214716GB | WEYRO WEYRO LTD | 13.6K | 3 | 56 |
| AS48266GB | Catixs Catixs Ltd | 13.6K | 471.1K | 82 |
| AS29527GB | ASTUTIUM-AS Astutium Limited | 13.3K | 1 | 12 |
| AS33941GB | GCONNECT GConnect Technology Ltd | 13.1K | 65.5K | 8 |
| AS57793GB | thirteenten 1310 Limited | 13.1K | 852K | 21 |
| AS14670GB | WHG-USE1 WHG Hosting Services Ltd | 13.1K | — | 45 |
| AS60672GB | SC ServerChoice Ltd | 12.8K | 196.6K | 26 |
| AS60439GB | SERVERNET-AS SERVERNET INTERNET LIMITED | 12.8K | 516 | 44 |
| AS29452GB | SECURA-AS Secura Hosting Ltd | 12.8K | 65.5K | 5 |
| AS34931GB | AWARESOFT Awareness Software Limited | 12.8K | — | 9 |
| AS209181GB | ZENEX5IVE-NL Zenex 5ive Limited | 12.8K | 524.3K | 52 |
| AS28690GB | ING-DIRECT-UK Barclays Bank PLC | 12.8K | — | 50 |
| AS8943GB | JUMP Jump Networks Ltd | 12.5K | 327.7K | 12 |
| AS44307GB | MDSOL MDSOL EUROPE LTD | 12.5K | — | 25 |
| AS44356GB | EPSILON Epsilon Telecommunications Ltd | 12.5K | 196.6K | 32 |
| AS49823GB | Hastingwood Hastingwood Securities Ltd | 12.3K | — | 19 |
| AS41484GB | nynet NYnet Ltd | 12.3K | 65.5K | 27 |
| AS61215GB | IIJ-EXLAYER-AS IIJ Europe Limited | 12.3K | 65.5K | 5 |
| AS34660GB | IDAQ-AS Roebuck Group Limited | 12.3K | 1M | 8 |
| AS204731GB | fibrenest FIBRENEST LIMITED | 12.3K | 70.1K | 27 |
| AS205917GB | sas_glcom Fluidone Ltd. | 12.3K | — | 10 |
| AS204139GB | NEXTGLOBALSERVICES NEXT GLOBAL SERVICES L.P. | 12K | — | 22 |
| AS50077GB | SYN-NL SYN LTD | 11.8K | — | 12 |
| AS196744GB | CAPITA Capita Business Services Ltd | 11.8K | — | 4 |
| AS51713GB | WHG-LON WHG Hosting Services Ltd | 11.8K | — | 28 |
| AS201002GB | PebbleHost-Customers PebbleHost Ltd | 11.8K | 65.8K | 50 |
| AS215355GB | AliceNetwork ALICE NETWORKS LTD | 11.8K | 294 | 56 |
| AS42004GB | ULGRP-AS VOIP-UN LIMITED | 11.8K | 65.5K | 9 |
| AS31084GB | MAGRATHEA-UK MAGRATHEA TELECOMMUNICATIONS LIMITED | 11.3K | 65.5K | 4 |