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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
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| 0 |
| AS44754GB | SPACEMINE-AS SpaceMine Ltd | — | 1 | 1 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 10 | 10 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS199748GB | CCN-UK Voneus Ltd | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS215363GB | Wles Wles Technologies Ltd | — | 257 | 2 |
| AS39553GB | BLUEPRINTGAMING Blueprint Gaming Ltd. | — | — | 0 |
| AS209606GB | BEYONDORBIT Beyond Orbit Ltd. | — | 3 | 3 |
| AS203438GB | RGSL Regus Group Services Ltd | — | — | 0 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS203423GB | innoix INNOIX LTD | — | — | 0 |
| AS59811GB | Voneus Voneus Ltd | — | — | 0 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS206307GB | aeromobile Aeromobile Communications Limited | — | — | 0 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS200079GB | mikrisphere-asn Mikrisphere LTD | — | — | 0 |
| AS201798GB | ABINTERNET Bogons Ltd | — | — | 0 |
| AS200681GB | IXMIDS-ROUTESRV IX Midlands Ltd | — | — | 0 |
| AS214240GB | SHDW Shadow Software Ltd | — | — | 0 |
| AS47918GB | MCDEU03 MCD Europe Limited | — | — | 0 |
| AS200198GB | DSMTech DSM (GB) Limited | — | 16 | 1 |
| AS211787GB | Rolosoft-Ltd Rolosoft Limited | — | — | 0 |
| AS210090GB | PIPER-AS Zack Piper | — | — | 0 |
| AS210993GB | AS210993 SPACECORE SOLUTION LTD | — | — | 0 |
| AS30746GB | NAT-MORRIS Nat Morris | — | — | 0 |
| AS28705GB | CYBASE-AS Cybase Limited | — | — | 0 |
| AS20629GB | UK-BIS Six Degrees Technology Group Limited | — | — | 0 |
| AS2855GB | Business-Fabric British Telecommunications PLC | — | — | 0 |
| AS197239GB | ClearNet HYPERLXC MEDICAL LTD | — | — | 0 |
| AS31562GB | OPENMARKET OpenMarket Limited | — | — | 0 |
| AS205909GB | Phystrax-Network Phystrax Ltd | — | 64 | 1 |
| AS29506GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS199228GB | IHOR-AS IHOR HOSTING LTD | — | — | 0 |
| AS199799GB | SOUNDMOUSE Soundmouse Ltd | — | — | 0 |
| AS28786GB | ASN-INSL Endava Managed Services Ltd | — | — | 0 |
| AS21345GB | SYMANTEC-EU CA Technology R&D Limited | — | — | 0 |
| AS200104GB | crow You are never Limited | — | 4.1K | 1 |
| AS197545GB | Era4-ASN Era4 Limited | — | — | 0 |
| AS213650GB | CDNINFRA-AS CDN Infra Limited | — | 272 | 2 |
| AS213112GB | IPMultihome IP Multihome Limited | — | — | 0 |
| AS199957GB | NATNET Nathan Lasseter | — | — | 0 |
| AS210277GB | IPXO Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS209230GB | SERVERNET-ASv SERVERNET INTERNET LIMITED | — | — | 0 |
| AS57014GB | metroswitch 4on LTD | — | — | 0 |