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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 |
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| AS34846GB | ccore-as NEWS CORP UK & IRELAND LIMITED | — | — | 0 |
| AS50930GB | REDINET Redinet Limited | — | — | 0 |
| AS205630GB | NOVECORE Novecore Ltd. | — | — | 0 |
| AS201980GB | UNION-AS Claranet Limited | — | — | 0 |
| AS43620GB | Syan Digital Space Group Limited | — | — | 0 |
| AS34041GB | BMA-ORG-UK British Medical Association | — | — | 0 |
| AS211036GB | LSYS1 Nathan James | — | — | 0 |
| AS200508GB | SOROK76-LTD SOROK76 LTD | — | — | 0 |
| AS200099GB | ASN-EXTLIKES Extlikes UK Marketing Limited | — | — | 0 |
| AS8718GB | Refinitiv Limited | — | — | 0 |
| AS199507GB | THALES-DNSP Thales UK Limited | — | — | 0 |
| AS199111GB | GC-NET GRAND CYAN LTD | — | — | 0 |
| AS6757GB | MULTIMSG VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS215413GB | PebbleHost-Protected PebbleHost Ltd | — | — | 0 |
| AS207200GB | Krisdev Kristian Hoyle-Johnson | — | — | 0 |
| AS60739GB | SCH-AS Pure IP Limited | — | — | 0 |
| AS211658GB | STRATUS_AS Unity World Ltd | — | — | 0 |
| AS12641GB | BT_MPLS British Telecommunications PLC | — | — | 0 |
| AS8714GB | LINX-ROUTESRV London Internet Exchange Ltd. | — | — | 0 |
| AS215242GB | DATAPENTA DATAPENTA LIMITED | — | — | 0 |
| AS15463GB | NETWORKI-AS Virtustream UK Ltd | — | — | 0 |
| AS213771GB | PLATANO-NETWORKS DCC TECH LTD | — | 12 | 4 |
| AS203438GB | RGSL Regus Group Services Ltd | — | — | 0 |
| AS211591GB | AS_ANYCAST Free Range Cloud Ltd. | — | — | 0 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS210703GB | FIRSTBYTE-AS FIRSTBYTE HOSTING LTD | — | — | 0 |
| AS210377GB | sift-ltd Sift Ltd | — | — | 0 |
| AS201765GB | NECTMANIA-AS NECTMANIA NETWORK LIMITED | — | — | 0 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | — | 0 |
| AS60759GB | IAASRUN-EMEA-AS Netsapiens International Limited | — | — | 0 |
| AS63053GB | IIX-AZIIX-RS - IX Reach Ltd | — | — | 0 |
| AS207965GB | ETIENNE-LABAUME ETIENNE LABAUME | — | — | 0 |
| AS59839GB | BROMLEYNET Bromleynet Limited | — | — | 0 |
| AS212534GB | LONIX SIGNALX CLOUD COMMUNICATIONS LTD | — | — | 0 |
| AS25061GB | ANLX-UK Associated Networks (UK) Limited | — | — | 0 |
| AS51391GB | Tommy-Bowditch Tommy Bowditch | — | — | 0 |
| AS197976GB | FAVBET-AS Favbet Invest LLP | — | — | 0 |
| AS60899GB | ATECHMEDIA-AS Krystal Hosting Ltd | — | — | 0 |
| AS51805GB | cantab Gam Systematic LLP | — | — | 0 |
| AS38966GB | IntraLAN-AS IntraLAN Group Limited | — | — | 0 |
| AS51170GB | Natterbox-net Red Matter Limited | — | — | 0 |
| AS44402GB | GFINET-AS GFI Holdings Limited | — | — | 0 |
| AS216442GB | uk-ngaconnect NGA Connect Limited | — | — | 0 |
| AS215012GB | ROEBUCK Roebuck Group Limited | — | — | 0 |
| AS49738GB | NETROX-AS 3nt solutions LLP | — | — | 0 |
| AS35143GB | BICOMDOO Bicom Systems Limited | — | — | 0 |