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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| 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 |
| 256 |
| — |
| 1 |
| AS211188GB | ASBTSLTD Business Teleports and Solutions Limited | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS215672GB | MoeChuang-Network MoeChuang Network Limited | 256 | 16 | 2 |
| AS204711GB | honest Honest Enterprises Ltd. | 256 | 65.5K | 2 |
| AS215527GB | XERONET Xero Networks LTD | 256 | 8 | 9 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS207652GB | BISAS Key IoT Limited | 256 | 524.3K | 2 |
| AS208563GB | LINUXGEMINI CodeReactor Limited | 256 | 256 | 2 |
| AS211067GB | LEC Eastbourne Borough Council | 256 | — | 1 |
| AS211339GB | VORTIA Vortia Ltd | 256 | — | 1 |
| AS57850GB | NWL-AS Northumbrian Water Ltd | 256 | — | 1 |
| AS204387GB | EG-AS Evolution Gaming LTD | 256 | — | 1 |
| AS206512GB | TIGOVA TIGOVA NETWORK LIMITED | 256 | — | 1 |
| AS212733GB | Netquirk Netquirk Limited | 256 | — | 1 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS213388GB | IIC-AS IIC RAIL LIMITED | 256 | — | 1 |
| AS204045GB | COMPASSPLUSGB-AS Compass Plus (Great Britain) Limited | 256 | — | 1 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | — | 1 |
| AS200708GB | PROTEUS-AS Hugo Rodrigues Da Costa | 256 | 1 | 2 |
| AS30894GB | SINCH-MBLOX-AS SINCH UK LTD. | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS215915GB | DEEPGREEN Deep Green Technologies Ltd | 256 | — | 1 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS218543GB | EasyIX EasyIX Networks Limited | 256 | 1 | 2 |
| AS210192GB | TOPLINESYSTEMS Topline Systems Ltd | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS206664GB | FlextradeUK-2 FLEXTRADE UK LIMITED | 256 | — | 1 |
| AS197355GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS206974GB | LALDY Laldy Ltd | 256 | — | 1 |
| AS60220GB | EA-UK-WIL Electronic Arts Limited | 256 | — | 1 |
| AS41553GB | Reed-Managed-Services Reed Specialist Recruitment Limited | 256 | — | 1 |
| AS216361GB | NiN Next Internet Network Ltd | 256 | — | 1 |
| AS205012GB | giant Giant Communications Ltd | 256 | 524.3K | 2 |
| AS62374GB | andymace Andy Mace | 256 | — | 1 |
| AS218644GB | DOGLE-AS Dylan Joseph Ogle | 256 | 1 | 2 |
| AS218754GB | THORN-HOSTING Thorn Hosting LTD | 256 | 1 | 2 |