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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 |
| — |
| 5 |
| 5 |
| AS199066GB | DATA8-AS Data8 Limited | — | — | 0 |
| AS199227GB | Protocol7-IX JIANYUELAB LTD | — | — | 0 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | — | — | 0 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | — | 1 | 1 |
| AS211393GB | VITRIFINET Vitrifi Limited | — | — | 0 |
| AS52076GB | ALGOSPAN-AS PICO GLOBAL LTD. | — | — | 0 |
| AS216116GB | vivoenergy-as Vivo Energy Ltd | — | — | 0 |
| AS219018GB | gb-ducky Droidhub LTD | — | 1 | 1 |
| AS203276GB | JAMINIT James Cook | — | — | 0 |
| AS206144GB | NA-Transit Clouvider Limited | — | — | 0 |
| AS202487GB | HPN HP Networks Ltd | — | — | 0 |
| AS43313GB | FLT ITS Technology Group Limited | — | — | 0 |
| AS43835GB | NCC NCC Services Ltd | — | — | 0 |
| AS50773GB | ASN-Anana16 Sabio Ltd. | — | — | 0 |
| AS201567GB | Cinnabar Vivian Band | — | 1 | 1 |
| AS60477GB | SIXDG-INSITE Six Degrees Technology Group Limited | — | — | 0 |
| AS132865GB | CMSL-AS-AP - Connect Managed Services (UK) Limited | — | — | 0 |
| AS43565GB | JumboIX IPTP LTD | — | — | 0 |
| AS202751GB | BGP_AS Christopher Edwards | — | 5 | 5 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS202532GB | MBYTECHNOLOGY Mbytechnology Limited | — | — | 0 |
| AS211787GB | Rolosoft-Ltd Rolosoft Limited | — | — | 0 |
| AS210516GB | KARMACOMPUTING Karma Computing Ltd | — | — | 0 |
| AS211149GB | legendfibre Talk Straight Ltd. | — | — | 0 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS213026GB | GWILKINSON George Wilkinson | — | 1 | 1 |
| AS218154GB | nexgen-eu3 NexGen Cloud Ltd | — | — | 0 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS213803GB | AS-Xray Xray Network Ltd | — | — | 0 |
| AS211108GB | RGA RGA UK SERVICES LIMITED | — | — | 0 |
| AS218940GB | KUMO2 Tealight Ltd | — | 1 | 1 |
| AS211900GB | IN8INITY IN8INITY GLOBAL LIMITED | — | — | 0 |
| AS213074GB | IPXO-Testing-ASN Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS216179GB | NATE-BILL Nathaniel Bill | — | — | 0 |
| AS42192GB | India THUNDER NETWORK LIMITED | — | 1 | 1 |
| AS218194GB | TENGIGCLOUD-AS 10GCLOUD LTD | — | — | 0 |
| AS212902GB | KKL Kustom Konsulting Limited | — | — | 0 |
| AS139324GB | RIOTINTOIST-AS-EMEA - Rio Tinto IS&T | — | — | 0 |
| AS212483GB | level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD | — | 30 | 15 |
| AS214457GB | veesix-networks Veesix Networks Ltd | — | — | 0 |
| AS218418GB | NINEONE-IXP 91TELECOM LTD | — | — | 0 |
| AS219467GB | SUYOU-NET SUYOU VPN LIMITED | — | — | 0 |
| AS211987GB | datagrid-network DATAGRID NETWORK LTD | — | — | 0 |
| AS24807GB | INFOCOM-AS Redcentric Solutions Ltd | — | — | 0 |
| AS25307GB | Equinix-Metro-Z EQUINIX (SERVICES) LIMITED | — | — | 0 |
| AS35662GB | IOMARTHOSTING Iomart Managed Services Limited | — | — | 0 |