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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 | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS212419GB | SALMON-AS Wunderman Thompson Commerce UK Ltd | 256 | — | 1 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 256 | 11 | 5 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS215419GB | karizanta Karizanta LTD | 256 | — | 1 |
| AS21464GB | EDF-AS EDF Trading Ltd | 256 | — | 1 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS218891GB | LIGHTBYTE-AS LIGHTBYTE LTD | 256 | 1 | 2 |
| AS219317GB | UGN-BILISIM UGN BILISIM INTERNET HIZMETLERI LTD | 256 | — | 1 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS205705GB | JDL-AS JDL Enterprises Limited | 256 | 2 | 3 |
| AS60220GB | EA-UK-WIL Electronic Arts Limited | 256 | — | 1 |
| AS215497GB | Tivarri Tivarri Limited | 256 | — | 1 |
| AS207477GB | PEACHY PEACHY SERVERS LIMITED | 256 | 65.5K | 2 |
| AS34625GB | OSHS-AS OSHS Ltd | 256 | — | 1 |
| AS211803GB | AS_INTER_ACT CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS219412GB | Oxiwave-Internet Lewis Brown | 256 | 74.3K | 14 |
| AS8272GB | NETSCALIBUR-UK Claranet Limited | 256 | — | 1 |
| AS218807GB | Pixel-Networks Timothy Glover | 256 | 1 | 2 |
| AS60914GB | TelecomsConsortiumLtd Telecoms Consortium Ltd. | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS200498GB | PWP-ASN Perella Weinberg Partners UK LLP | 256 | — | 1 |
| AS212705GB | TIG-Network TIG Management Services Limited | 256 | 524.3K | 2 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS218736GB | H1CLOUD H1CLOUD LTD | 256 | — | 1 |
| AS211374GB | McLarenApplied Motion Applied Limited | 256 | — | 1 |
| AS44426GB | SYNECTICS-AS Synectics Solutions Ltd | 256 | — | 1 |
| AS211303GB | EA-UK-SOU Electronic Arts Limited | 256 | — | 1 |
| AS6540GB | SAMUEL-COSGROVE Samuel Cosgrove | 256 | — | 1 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS206146GB | PSND-UK PAYSEND TECHNOLOGY LIMITED | 256 | — | 1 |
| AS213515GB | Honeybank-Studios Honeybank Studios LTD | 256 | — | 1 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS202529GB | CDW-UK-IT-ASN CDW Ltd | 256 | — | 1 |
| AS205012GB | giant Giant Communications Ltd | 256 | 524.3K | 2 |
| AS206392GB | HACKWORTH_UK Hackworth Ltd | 256 | 48 | 3 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS196902GB | DUDLEY-MBC Dudley Metropolitan Borough Council | 256 | 1 | 2 |
| AS204318GB | BGPTOOLS-QA Benjamin Cartwright-Cox | 256 | 143 | 144 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS60735GB | DELIGHTVPS-AS Konstantin Verba | 256 | 77.8K | 5 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |