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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 |
| 2.6K |
| 24 |
| 19 |
| AS201862GB | VMhosts-London-AS VMhosts Ltd | 2.6K | 65.5K | 8 |
| AS39588GB | MIMECAST-DE Mimecast Services Limited | 2.6K | 2 | 10 |
| AS203421GB | BALTICBROADBAND-AS Baltic Broadband Limited | 2.6K | — | 4 |
| AS218887GB | E-GAUSS E-GAUSS LTD | 2.8K | — | 11 |
| AS211029GB | XTX XTX Markets Limited | 2.8K | — | 5 |
| AS215638GB | AS-CILIX-LIMITED Cilix Limited | 2.8K | 393.2K | 16 |
| AS209243GB | quickhostuk QuickHostUK Limited | 2.8K | 65.5K | 12 |
| AS206245GB | SubsetUK Subset Solutions UK Limited | 2.8K | — | 5 |
| AS218862GB | DIGITALZERO-MNT DIGITAL ZERO ONE LTD | 2.8K | — | 11 |
| AS210980GB | MANTA-TECH MANTA TECH LTD | 2.8K | — | 11 |
| AS57624GB | BeeksFX Beeks Financial Cloud Ltd | 2.8K | — | 11 |
| AS25470GB | Scottish-Southern-Plc-AS Neos Networks Limited | 2.8K | — | 3 |
| AS198690GB | FIBRECAST Fibrecast Ltd. | 2.8K | — | 6 |
| AS16224GB | FIFA-AS Verizon UK Limited | 2.8K | — | 11 |
| AS204921GB | YunZheng-Network zhenyun sun | 2.8K | 33 | 24 |
| AS43355GB | GATWICK-AIRPORT GATWICK AIRPORT LIMITED | 2.8K | 589.8K | 9 |
| AS210457GB | KYONIX Kyonix Networks Limited | 2.8K | 96 | 29 |
| AS205290GB | NAOBOROT-AS NAOBOROT LLP | 2.8K | — | 11 |
| AS60045GB | KUBE-AS Kube Networks Ltd | 2.8K | — | 7 |
| AS62246GB | WJY-AS WJY Limited | 2.8K | 1.3K | 12 |
| AS199717GB | Panoptics Panoptics Global Ltd | 2.8K | — | 11 |
| AS208035GB | VENOM-ASN Venom IT Ltd | 2.8K | — | 9 |
| AS51553GB | TelecomPlus Telecom Plus PLC | 2.8K | — | 11 |
| AS42427GB | MIMECAST-UK Mimecast Services Limited | 2.8K | 2 | 13 |
| AS51409GB | SIPSYNERGY Sipsynergy Limited | 3.1K | — | 12 |
| AS39730GB | EIRCOM-UK Eircom (UK) Ltd | 3.1K | 524.3K | 3 |
| AS206237GB | BARCLAYS_BPS Barclays Bank PLC | 3.1K | — | 7 |
| AS200675GB | HYDRO66 NORTHERN DATA SERVICES (UK) LIMITED | 3.1K | 524.3K | 4 |
| AS52200GB | M5-AS M5 Limited | 3.1K | — | 3 |
| AS210099GB | TIGOVA TIGOVA NETWORK LIMITED | 3.1K | — | 12 |
| AS49229GB | ANS-GROUP-AS ANS Group Limited | 3.1K | — | 12 |
| AS31256GB | WARWICKSHIRECC Warwickshire County Council | 3.1K | — | 2 |
| AS29045GB | ITACTION IT Action Limited | 3.1K | — | 2 |
| AS212633GB | EE-Mobile EE Mobile Telecom Ltd | 3.1K | 524.3K | 13 |
| AS200083GB | SUB6 Sub 6 Limited | 3.1K | 65.5K | 3 |
| AS57307GB | BLAZE-NETWORKS Communicate Technology LTD | 3.1K | — | 2 |
| AS51707GB | INNOVATION-CENTRE-MEDWAY-ASN Medway Towns Council | 3.1K | — | 3 |
| AS212694GB | AST_INTEGRA Applied Satellite Technology Ltd | 3.1K | — | 2 |
| AS201855GB | uk-as-raymondjames RAYMOND JAMES INVESTMENT SERVICES LIMITED | 3.1K | — | 7 |
| AS209326GB | CF-001 AMPHORA TRADING LTD | 3.1K | — | 12 |
| AS206626GB | PSDGroup-AS Professional Software Design Ltd | 3.1K | — | 8 |
| AS25462GB | RETN-UA-AS RETN Limited | 3.1K | — | 2 |
| AS43950GB | SPILSBY-AS Terence Froy trading as "Spilsby Internet Solutions" | 3.1K | 65.5K | 3 |
| AS5459GB | LINX-AS London Internet Exchange Ltd. | 3.1K | 65.5K | 4 |
| AS57907GB | CLOUDCONNX CloudConnX Limited | 3.1K | 524.3K | 3 |
| AS28863GB | Thales-SCS Thales UK Limited | 3.1K | — | 5 |