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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 |
| — |
| 1 |
| 1 |
| AS201280GB | five9uk FIVE9 INC UK LIMITED | — | — | 0 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS60160GB | Jefferies-AS Jefferies International Limited | — | — | 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS200279GB | DOUWES-NET Thomas Douwes | — | 5 | 5 |
| AS197613GB | NMARSHALL-AS Nicholas Marshall | — | — | 0 |
| AS58285GB | ASSIXOP Sixnet Operation Ltd | — | 10.6M | 256 |
| AS60381GB | PANA-AS Pana Services Ltd | — | — | 0 |
| AS218705GB | BGPEX Jeremy Gumbley | — | 1 | 1 |
| AS57927GB | UK-KECONNECT Digital Space Group Limited | — | — | 0 |
| AS207135GB | Giotsas Vasileios Giotsas | — | 2 | 2 |
| AS198299GB | Kooljett-AS Kooljett Limited | — | — | 0 |
| AS218839GB | ZONEKTELECOM-AS ZONEK TELECOM LTD | — | 10 | 10 |
| AS198740GB | AS_SPEEDYBITS Speedy Bits LTD | — | — | 0 |
| AS200535GB | INITARA-AS Initara Ltd | — | — | 0 |
| AS60714GB | TELNA-UK TELNA (UK) LTD | — | — | 0 |
| AS219018GB | gb-ducky Droidhub LTD | — | 1 | 1 |
| AS200493GB | WHITEQUARK-AS Ekaterina Zotova | — | 1 | 1 |
| AS219327GB | DISASTER Disaster Limited | — | 1 | 1 |
| AS215913GB | NetLab Chun Ming Ou | — | — | 0 |
| AS205909GB | Phystrax-Network Phystrax Ltd | — | 64 | 1 |
| AS215474GB | BIIL-RU-AS BIIL RU LTD | — | — | 0 |
| AS58148GB | IRONSIDE Ironside Systems Ltd. | — | 1 | 1 |
| AS213854GB | RESURE RE:SURE INTELLIGENCE LTD | — | — | 0 |
| AS211224GB | JB3 Joseph Banks | — | 17 | 2 |
| AS51603GB | ACME-AS Acme Internet Ltd | — | — | 0 |
| AS140590GB | DSSPL-AS-AP - DGT Services Singapore PTE Ltd. | — | — | 0 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS215022GB | FWLB-networks Jamie Hosker | — | 1 | 1 |
| AS219457GB | Zephyrbash-Labs Evan Galvin | — | 1 | 1 |
| AS50534GB | VMO2 Virgin Media Limited | — | — | 0 |
| AS198276GB | ARPERLA Jordan Robert | — | 2 | 2 |
| AS47712GB | VELOCIX-EU VELOCIX SOLUTIONS LIMITED | — | — | 0 |
| AS204931GB | PNOSOLUTIONS-AS PNO Solutions Limited | — | 8 | 2 |
| AS34026GB | IXBIRMINGHAM Nuco Technologies Ltd | — | — | 0 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 28 | 13 |
| AS207965GB | ETIENNE-LABAUME ETIENNE LABAUME | — | 13 | 3 |
| AS206792GB | ZACH Zachary Buller | — | 16 | 1 |
| AS201437GB | Ionworks-ASN1 Ionworks Ltd | — | — | 0 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS218844GB | Shorepath-Telecom Shorepath Telecom Ltd | — | — | 0 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS212390GB | CentralNic-Anycast-J CentralNic Ltd | — | — | 0 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS209808GB | LUKE Luke James | — | 64 | 1 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |