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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.
3,132 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 | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 3.1K |
| — |
| 5 |
| AS8356GB | NEOTEL-UK PRT Systems Limited | 3.1K | 65.5K | 3 |
| AS212633GB | EE-Mobile EE Mobile Telecom Ltd | 3.1K | 524.3K | 13 |
| AS33921GB | Lebara-AS Lebara Ltd | 3.1K | 256 | 13 |
| AS33967GB | GB-LANCSCC Lancashire County Council | 3.1K | — | 3 |
| AS52200GB | M5-AS M5 Limited | 3.1K | — | 3 |
| AS199717GB | Panoptics Panoptics Global Ltd | 2.8K | — | 11 |
| AS60045GB | KUBE-AS Kube Networks Ltd | 2.8K | — | 7 |
| AS198690GB | FIBRECAST Fibrecast Ltd. | 2.8K | — | 6 |
| AS206245GB | SubsetUK Subset Solutions UK Limited | 2.8K | — | 5 |
| AS60610GB | EVEREST-AS Amito Ltd | 2.8K | 1M | 7 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | 2.8K | — | 11 |
| AS215638GB | AS-CILIX-LIMITED Cilix Limited | 2.8K | 393.2K | 16 |
| AS57624GB | BeeksFX Beeks Financial Cloud Ltd | 2.8K | — | 11 |
| AS42427GB | MIMECAST-UK Mimecast Services Limited | 2.8K | 2 | 13 |
| AS211029GB | XTX XTX Markets Limited | 2.8K | — | 5 |
| AS25470GB | Scottish-Southern-Plc-AS Neos Networks Limited | 2.8K | — | 3 |
| AS51553GB | TelecomPlus Telecom Plus PLC | 2.8K | — | 11 |
| AS210457GB | KYONIX Kyonix Networks Limited | 2.8K | 96 | 29 |
| AS62246GB | WJY-AS WJY Limited | 2.8K | 1.5K | 13 |
| AS204921GB | YunZheng-Network zhenyun sun | 2.8K | 32 | 23 |
| AS211775GB | NGFL-ASN London Grid for Learning Trust | 2.8K | — | 3 |
| AS208035GB | VENOM-ASN Venom IT Ltd | 2.8K | — | 9 |
| AS29626GB | STAFFSCC Staffordshire County Council | 2.6K | — | 2 |
| AS48688GB | Thales_UK_Ltd Thales UK Ltd | 2.6K | — | 4 |
| AS51100GB | Kier Kier Ltd | 2.6K | — | 7 |
| AS201902GB | BICOM Bicom Systems Limited | 2.6K | 2 | 8 |
| AS60157GB | ANTHEUS Antheus Telecom Ltd | 2.6K | 4 | 12 |
| AS203067GB | Giacom GIACOM (CLOUD) LIMITED | 2.6K | — | 9 |
| AS203897GB | ITLAB ADVANIA UK LIMITED | 2.6K | — | 8 |
| AS219005GB | NOVUM NOVUM VENTURES LTD | 2.6K | — | 10 |
| AS209594GB | IGC-AS IGC Technical Solutions Ltd | 2.6K | 524.3K | 6 |
| AS205847GB | BORDERLINK GoFibre Holdings Limited | 2.6K | 9.2K | 17 |
| AS203154GB | MITELIS-DOWNSTREAM MITELIS SECURITY LIMITED | 2.6K | — | 10 |
| AS24949GB | BTCML-AXA-AS AXA Technology Services UK Limited | 2.6K | — | 6 |
| AS198554GB | DXI-AS 8X8 UK Limited | 2.6K | — | 7 |
| AS16164GB | SOHONET-AS Sohonet Limited | 2.6K | 65.5K | 4 |
| AS203421GB | BALTICBROADBAND-AS Baltic Broadband Limited | 2.6K | — | 4 |
| AS34979GB | ThirtyNineNetworks 39 DESIGN LTD | 2.6K | — | 6 |
| AS39588GB | MIMECAST-DE Mimecast Services Limited | 2.6K | 2 | 10 |
| AS47631GB | sipcom-net1 SIP COMMUNICATIONS LIMITED | 2.6K | 65.5K | 11 |
| AS210450GB | ASN_NHSBARTSHEALTH BARTS HEALTH NHS TRUST | 2.6K | — | 3 |
| AS201862GB | VMhosts-London-AS VMhosts Ltd | 2.6K | 65.5K | 8 |
| AS205290GB | NAOBOROT-AS NAOBOROT LLP | 2.6K | — | 10 |
| AS204914GB | LABIXE LABIXE LTD | 2.6K | 1 | 11 |
| AS47716GB | ISIX-CLOUD-AS ISIX Communications LLP | 2.6K | 524.3K | 5 |
| AS205091GB | EuroNet EuroNet Internet Ltd | 2.6K | 524.3K | 10 |