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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
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| 0 |
| AS198658GB | Cooper_Networks Elliott Cooper | — | — | 0 |
| AS216126GB | James-Ledger James Ledger | — | 13 | 13 |
| AS60739GB | SCH-AS Pure IP Limited | — | — | 0 |
| AS60180GB | NEW VPLAB LTD | — | — | 0 |
| AS59581GB | GB-LANCSCC-2 Lancashire County Council | — | — | 0 |
| AS51391GB | Tommy-Bowditch Tommy Bowditch | — | — | 0 |
| AS50799GB | REED-BUSINESS LNRS Data Services Limited | — | — | 0 |
| AS43539GB | DRBSY Roebuck Group Limited | — | — | 0 |
| AS59634GB | ZETTA Zetta Connect Ltd | — | — | 0 |
| AS204994GB | BAHAMUT-ZONE Luke Seabrook | — | 1 | 1 |
| AS216442GB | uk-ngaconnect NGA Connect Limited | — | — | 0 |
| AS201487GB | nsmnet Nathan Morgan | — | — | 0 |
| AS214005GB | MAINSTREAM-CIR-AS Mainstream Digital Ltd | — | — | 0 |
| AS207890GB | Intefluent Andrew Williams | — | 17 | 2 |
| AS212556GB | BT-ESC British Telecommunications PLC | — | — | 0 |
| AS209756GB | Msphere Msphere Ltd | — | — | 0 |
| AS208585GB | CSSUK Clear Street Services UK LTD | — | — | 0 |
| AS200708GB | GLASSIO-AS Hugo Rodrigues Da Costa | — | 1 | 1 |
| AS206895GB | PRIMONET-RESEARCH-AS Ashley Primo | — | — | 0 |
| AS205328GB | spirit The Spiritual Agency, private company limited by guarantee | — | — | 0 |
| AS205281GB | NF-CLOUD1 Otava Tech LTD | — | — | 0 |
| AS212010GB | XCOMMUK X.COMMunications Ltd. | — | — | 0 |
| AS202631GB | LINX-GVPP London Internet Exchange Ltd. | — | — | 0 |
| AS46681GB | GCGRY - Garden City Games Ltd | — | — | 0 |
| AS201824GB | stat-cons-as STAT CONSULTING LTD | — | 1 | 1 |
| AS208121GB | VWMEDIA LOBOS NETWORKING LTD | — | — | 0 |
| AS204675GB | DIGIBIT DIGIBIT TECH LTD | — | — | 0 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | — | — | 0 |
| AS59566GB | LogicForge LogicForge Limited | — | 8.2K | 1 |
| AS202355GB | CIALLO-AS Ciallo Networks LTD | — | — | 0 |
| AS132006GB | DIOM-AS-AP - Domicilium (IOM) Ltd | — | — | 0 |
| AS62980GB | IIX-SJIIX-RS - IX Reach Ltd | — | — | 0 |
| AS213771GB | PLATANO-NETWORKS DCC TECH LTD | — | 10 | 3 |
| AS203465GB | HEIDMAR-CORE Heidmar UK Limited | — | — | 0 |
| AS48493GB | TFMNET-AS TFM NETWORKS LIMITED | — | — | 0 |
| AS203146GB | ORG-SF252-RIPE SwiftConnect Fiber LTD | — | — | 0 |
| AS38998GB | PROJECTS-ABROAD-AS Projects Abroad (UK) Ltd | — | — | 0 |
| AS35528GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS29131GB | RAPIDSWITCH-AS IOMART CLOUD SERVICES LIMITED | — | — | 0 |
| AS6847GB | VODAFONE-VONE-C VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS197613GB | NMARSHALL-AS Nicholas Marshall | — | 17 | 2 |
| AS6727GB | EASYNET-FRANCE GTT - EMEA Ltd. | — | — | 0 |
| AS213060GB | IPXO-Testing-ASN Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS216149GB | DomainR Domain Recovery Limited | — | — | 0 |
| AS204375GB | Adam-Goodenough Adam Goodenough | — | 17 | 2 |
| AS201580GB | Secunia Flexera Software Limited | — | — | 0 |