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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 |
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| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS35069GB | TIBRA-LD-AS Tibra Trading Europe Limited | — | — | 0 |
| AS39179GB | NASSTAR-TRANSIT-AS GCI Network Solutions Limited | — | — | 0 |
| AS43207GB | QUICKLINE Quickline Communications Limited | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS197360GB | HQ-24Ping-Ltd 24Ping Ltd. | — | — | 0 |
| AS48493GB | TFMNET-AS TFM NETWORKS LIMITED | — | — | 0 |
| AS8276GB | VONESERVICES Vone Services Ltd | — | — | 0 |
| AS12640GB | COLT Technology Services Group Limited | — | — | 0 |
| AS209210GB | SoftProg Softprog IT Ltd | — | — | 0 |
| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS202808GB | LOGIENET Blairlogie Community and Heritage Trust | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS206573GB | Lonsys-uk London Systems UK Limited | 256 | — | 1 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS42046GB | ITN Independent Television News Limited | 256 | — | 1 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS60735GB | DELIGHTVPS-AS Konstantin Verba | 256 | 77.8K | 5 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS214451GB | R3ido101 Oliver Reid | 256 | 131.1K | 3 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS49372GB | Wichita-Inter-Konnects-1LL4H w1n ltd | 256 | — | 1 |
| AS205011GB | celertechuk Celer Technologies Limited | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS58117GB | TOUCHTEC TouchTec Technology Limited | 256 | — | 1 |
| AS197213GB | NINETY-ONE-TELECOM 91TELECOM LTD | 256 | 17 | 3 |
| AS198189GB | STEALTHVM Throttle Limited | 256 | 1 | 2 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS216186GB | AS_PENTEST Pen Test Partners LLP | 256 | 65.5K | 2 |
| AS199131GB | CITY-OF-YORK-COUNCIL City of York Council | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS219236GB | WGL Wolf Girls Limited | 256 | 1 | 2 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS34640GB | NEX-CORP-UK CME Operations Limited | 256 | — | 1 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS60431GB | PNO-AS PNO Solutions Limited | 256 | 49 | 5 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS57408GB | REED-SMITH-EU-ASN Reed Smith LLP | 256 | — | 1 |