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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 |
| AS197166GB | GOTSCHNA-AS Gotschna Limited | — | 2 | 2 |
| AS205383GB | PERRYNET Rhys Perry | — | 1 | 1 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS64485GB | ST-UK Mitel Networks Limited | — | — | 0 |
| AS202615GB | ECHO Inspect Element Ltd | — | 2 | 2 |
| AS42902GB | GLOBECONNECT Clouvider Limited | — | — | 0 |
| AS202944GB | IXLIV IX Liverpool Limited | — | — | 0 |
| AS199066GB | DATA8-AS Data8 Limited | — | — | 0 |
| AS215471GB | INTERNETTYUK-MDU Internetty Ltd | — | — | 0 |
| AS205909GB | Phystrax-Network Phystrax Ltd | — | 64 | 1 |
| AS148971GB | KEIBIIN-AS-AP - Keibiin's Holdings Limited | — | 313 | 13 |
| AS201980GB | UNION-AS Claranet Limited | — | — | 0 |
| AS201690GB | CallWithMe-AS CALLWITHME LTD. | — | — | 0 |
| AS200099GB | ASN-EXTLIKES Extlikes UK Marketing Limited | — | — | 0 |
| AS199507GB | THALES-DNSP Thales UK Limited | — | — | 0 |
| AS203276GB | JAMINIT James Cook | — | — | 0 |
| AS198064GB | ZEROPACKETS-LTD ZEROPACKETS LTD | — | — | 0 |
| AS197913GB | CCPG-AS Cadence Networks Ltd | — | — | 0 |
| AS60210GB | THIRDCIRCLE-AS Third Circle Ltd | — | — | 0 |
| AS211900GB | IN8INITY IN8INITY GLOBAL LIMITED | — | — | 0 |
| AS49900GB | Betfair-DC1 The Sporting Exchange (Clients) Ltd | — | — | 0 |
| AS21321GB | NETUITY-AS BITNIFTY LTD | — | — | 0 |
| AS211166GB | asserizyweb LOBOS NETWORKING LTD | — | — | 0 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 10 | 10 |
| AS62079GB | RAPIDIX Inferno Communications Ltd | — | — | 0 |
| AS200535GB | INITARA-AS Initara Ltd | — | — | 0 |
| AS213085GB | LOGINELTDAS Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS215158GB | SIXNET-OP2 Sixnet Operation Ltd | — | 65.5K | 1 |
| AS198557GB | ONETTL George French | — | 1 | 1 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS204316GB | LINKBROADBAND Link Network Installation limited | — | — | 0 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS208665GB | TELEKLINE-AS Gareth Pulham | — | 2 | 2 |
| AS213092GB | marbleis Acrion International Limited | — | 28 | 13 |
| AS212556GB | BT-ESC British Telecommunications PLC | — | — | 0 |
| AS215600GB | KTTCARRIER KTT Europe Limited | — | 65.5K | 1 |
| AS205464GB | dyfedit Voneus Ltd | — | — | 0 |
| AS204946GB | GUFFNET ABSOLUTE GUFF LTD | — | 1 | 1 |
| AS39530GB | parker James Parker | — | — | 0 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS200167GB | excellondon London International Exhibition Centre PLC | — | — | 0 |
| AS212474GB | Daniella-Smithson Daniella Smithson | — | — | 0 |
| AS44488GB | IXBRIGHTON Brighton Digital Exchange Cooperative Limited | — | — | 0 |
| AS201529GB | ORCHID-CELLMARK-ABINGDON Orchid Cellmark Ltd | — | 1 | 1 |
| AS202776GB | Moeclub MOECLUB LTD | — | 4 | 4 |
| AS213447GB | The-Aster-Institute-of-Education ASTER GLOBAL CO. LTD | — | 1 | 1 |