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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
| — |
| 17 |
| 2 |
| AS8457GB | INDEXSCOPE LIMITED | — | — | 0 |
| AS200104GB | crow You are never Limited | — | 4.1K | 3 |
| AS198653GB | SOLARAPPS-AS SOLARAPPS LTD | — | — | 0 |
| AS213771GB | PLATANO-NETWORKS DCC TECH LTD | — | 12 | 4 |
| AS198382GB | FIRSTEASY-AS Teledata UK Limited | — | — | 0 |
| AS209771GB | SYSN SYSN LTD | — | 2 | 2 |
| AS44402GB | GFINET-AS GFI Holdings Limited | — | — | 0 |
| AS204946GB | GUFFNET ABSOLUTE GUFF LTD | — | 1 | 1 |
| AS47762GB | westcloud-AS CCPRO Solutions Limited | — | — | 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS39139GB | Menzies-Aviation-PLC-AS Menzies Aviation Plc | — | — | 0 |
| AS214018GB | IIC-AS INTERNET INTELLIGENCE COMPANY LTD | — | 1 | 1 |
| AS213436GB | NIUZI_DADA_CLOUD NIUZI DADA CLOUD LIMITED | — | 1K | 1 |
| AS198276GB | Lazuline Jordan Robert | — | 2 | 2 |
| AS132865GB | CMSL-AS-AP - Connect Managed Services (UK) Limited | — | — | 0 |
| AS59426GB | ISP-INTEXON-LTD INTEXON LTD | — | — | 0 |
| AS216116GB | vivoenergy-as Vivo Energy Ltd | — | — | 0 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS215754GB | FIBREWAVE-CUST Fiberwave Broadband Ltd | — | — | 0 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 594 | 20 |
| AS208784GB | ASTLRK TELROCK SYSTEMS LIMITED | — | — | 0 |
| AS213202GB | The-Cloud-Systems-Group Cloudnet Computing Ltd | — | — | 0 |
| AS211393GB | VITRIFINET Vitrifi Limited | — | — | 0 |
| AS211131GB | as_globaltechinterapps LOBOS NETWORKING LTD | — | — | 0 |
| AS202519GB | WG-PSBA Welsh Government | — | — | 0 |
| AS206987GB | MARCUSNAW Marcus Nawrocki | — | — | 0 |
| AS201432GB | Caleycom Converged Communication Solutions Limited | — | — | 0 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS197595GB | SEEKAHOST-TECH SEEKAHOST TECHNOLOGIES LTD | — | — | 0 |
| AS139853GB | NOMINET-AS-AP - NOMINET UK | — | — | 0 |
| AS48375GB | TIBRA-LC-AS Tibra Trading Europe Limited | — | — | 0 |
| AS216364GB | uk-globalreachtech Global Reach Technology EMEA Limited | — | 8.2K | 2 |
| AS31422GB | AONUK-AS AON UK LIMITED | — | — | 0 |
| AS39451GB | IOMART-AS Iomart Managed Services Limited | — | — | 0 |
| AS25127GB | BTOW British Telecommunications PLC | — | — | 0 |
| AS210387GB | GUARDY Guardy Limited | — | 4.1K | 1 |
| AS50697GB | ACSN-AS Reliance Cyber Ltd | — | — | 0 |
| AS60759GB | IAASRUN-EMEA-AS Netsapiens International Limited | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS43251GB | SURFCONTROL-READING Forcepoint Overseas Limited | — | — | 0 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS200927GB | ProxyOmega ProxyOmega LTD | — | 65.5K | 1 |