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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 2.6K |
| 65.5K |
| 4 |
| AS62172GB | AIRBYTES AIRBYTES COMMUNICATIONS Limited | 2.6K | 262.1K | 14 |
| AS209243GB | quickhostuk QuickHostUK Limited | 2.6K | 65.5K | 11 |
| AS219005GB | NOVUM NOVUM VENTURES LTD | 2.6K | — | 10 |
| AS204914GB | LABIXE LABIXE LTD | 2.6K | 1 | 11 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | 2.8K | — | 11 |
| AS210457GB | KYONIX Kyonix Networks Limited | 2.8K | 96 | 29 |
| AS25470GB | Scottish-Southern-Plc-AS Neos Networks Limited | 2.8K | — | 3 |
| AS43355GB | GATWICK-AIRPORT GATWICK AIRPORT LIMITED | 2.8K | 589.8K | 9 |
| AS206245GB | SubsetUK Subset Solutions UK Limited | 2.8K | — | 5 |
| AS215638GB | AS-CILIX-LIMITED Cilix Limited | 2.8K | 393.2K | 16 |
| AS198690GB | FIBRECAST Fibrecast Ltd. | 2.8K | — | 6 |
| AS51553GB | TelecomPlus Telecom Plus PLC | 2.8K | — | 11 |
| AS42427GB | MIMECAST-UK Mimecast Services Limited | 2.8K | 2 | 13 |
| AS60045GB | KUBE-AS Kube Networks Ltd | 2.8K | — | 7 |
| AS208035GB | VENOM-ASN Venom IT Ltd | 2.8K | — | 9 |
| AS211775GB | NGFL-ASN London Grid for Learning Trust | 2.8K | — | 3 |
| AS57624GB | BeeksFX Beeks Financial Cloud Ltd | 2.8K | — | 11 |
| AS211029GB | XTX XTX Markets Limited | 2.8K | — | 5 |
| AS204921GB | YunZheng-Network zhenyun sun | 2.8K | 33 | 24 |
| AS199717GB | Panoptics Panoptics Global Ltd | 2.8K | — | 11 |
| AS60610GB | EVEREST-AS Amito Ltd | 2.8K | 1M | 7 |
| AS62246GB | WJY-AS WJY Limited | 2.8K | 1.5K | 13 |
| AS60241GB | HUBS-EDIN High-Speed Universal Broadband Services C.I.C. | 3.1K | 524.3K | 4 |
| AS47625GB | UKHOST4U Paul David Hughes | 3.1K | — | 6 |
| AS8356GB | NEOTEL-UK PRT Systems Limited | 3.1K | 65.5K | 3 |
| AS33921GB | Lebara-AS Lebara Ltd | 3.1K | 256 | 13 |
| AS206626GB | PSDGroup-AS Professional Software Design Ltd | 3.1K | — | 8 |
| AS52063GB | SYSTEMIP TTP Cloud Group Ltd | 3.1K | 65.5K | 3 |
| AS201855GB | uk-as-raymondjames RAYMOND JAMES INVESTMENT SERVICES LIMITED | 3.1K | — | 7 |
| AS39382GB | OPTINIUMWH-AS Optinium Ltd | 3.1K | — | 2 |
| AS29045GB | ITACTION IT Action Limited | 3.1K | — | 2 |
| AS29575GB | LONDSTOCK-AS London Stock Exchange PLC | 3.1K | — | 7 |
| AS212694GB | AST_INTEGRA Applied Satellite Technology Ltd | 3.1K | — | 2 |
| AS28863GB | Thales-SCS Thales UK Limited | 3.1K | — | 5 |
| AS200675GB | HYDRO66 NORTHERN DATA SERVICES (UK) LIMITED | 3.1K | 524.3K | 4 |
| AS52200GB | M5-AS M5 Limited | 3.1K | — | 3 |
| AS58246GB | LothianBroadband Highland Broadband Networks Limited | 3.1K | 524.3K | 4 |
| AS206237GB | BARCLAYS_BPS Barclays Bank PLC | 3.1K | — | 7 |
| AS52041GB | SCALEBLADE Scaleblade, Ltd. | 3.1K | 24 | 21 |
| AS39846GB | ONEGA Onega Ltd | 3.1K | — | 5 |
| AS200083GB | SUB6 Sub 6 Limited | 3.1K | 65.5K | 3 |
| AS212633GB | EE-Mobile EE Mobile Telecom Ltd | 3.1K | 524.3K | 13 |
| AS39730GB | EIRCOM-UK Eircom (UK) Ltd | 3.1K | 524.3K | 3 |
| AS212194GB | Yuusei YUUSEI LTD | 3.1K | 3 | 10 |
| AS210099GB | TIGOVA TIGOVA NETWORK LIMITED | 3.1K | — | 12 |
| AS57307GB | BLAZE-NETWORKS Communicate Technology LTD | 3.1K | — | 2 |