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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.
3,132 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 | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 256 |
| — |
| 1 |
| AS48460GB | GREENCO-DR ServerHouse Ltd | 256 | — | 1 |
| AS211667GB | CO3 COMPANY 3 STUDIOS UK LTD | 256 | — | 1 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS201422GB | MEDIEVALSNAIL-ASN Medieval Snail Limited | 256 | 1 | 2 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS42359GB | WEMBLEY-AS The Football Association Ltd. | 256 | — | 1 |
| AS200280GB | CameronSharp Cameron Sharp | 256 | 1 | 2 |
| AS206071GB | EA-DE-COLOGNE Electronic Arts Limited | 256 | — | 1 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS219185GB | NARWHAL-NETTECH NARWHAL NETTECH LIMITED | 256 | 3 | 4 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS60933GB | QUALCO-IL QUALCOMM (UK) LIMITED | 256 | — | 1 |
| AS48632GB | BTS-HOLDINGS-PLC BTS HOLDINGS PLC | 256 | — | 1 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS211339GB | VORTIA Vortia Ltd | 256 | — | 1 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS207748GB | FRASER-AS Stephen Fraser | 256 | 260 | 6 |
| AS62112GB | XCONNECT-NL XConnect Services Limited | 256 | — | 1 |
| AS213000GB | ASAML Alliance Medical Limited | 256 | — | 1 |
| AS211032GB | ASHALLSON LOBOS NETWORKING LTD | 256 | — | 1 |
| AS198636GB | CAPSULA-AS CAPSULA LTD | 256 | 1 | 2 |
| AS16339GB | VI-UK Virtual Internet (UK) Limited | 256 | — | 1 |
| AS212068GB | ALIOTH Alioth Systems Limited | 256 | 18 | 4 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS56723GB | EA-ES-OMBU Electronic Arts Limited | 256 | — | 1 |
| AS211371GB | TELET Telet Research (N.I) Limited | 256 | — | 1 |
| AS51392GB | FUSIONED Fusioned Ltd | 256 | 65.5K | 2 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS42465GB | FORCEPOINT-ANYCAST-AS Forcepoint UK Limited | 256 | — | 1 |
| AS47367GB | TORBAY-AS Torbay Economic Development Company Limited | 256 | — | 1 |
| AS202141GB | HALLHOST-AS Warren Hall | 256 | — | 1 |
| AS60894GB | FLOWNET Flownet Solutions Ltd | 256 | 17 | 3 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | 256 | 4 | 5 |
| AS207652GB | BISAS Key IoT Limited | 256 | 524.3K | 2 |
| AS204340GB | IQVIA-Germany IQVIA LTD. | 256 | — | 1 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS211803GB | AS_INTER_ACT CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS210216GB | hcluk-as-ms HCL Technologies UK Limited | 256 | — | 1 |
| AS212459GB | CELERTECH-SG1 Celer Technologies Limited | 256 | — | 1 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | 256 | 1 | 2 |