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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 |
| 256 |
| — |
| 1 |
| AS42359GB | WEMBLEY-AS The Football Association Ltd. | 256 | — | 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS212788GB | edgenet Edge Network Technologies Ltd | 256 | — | 1 |
| AS56739GB | DICO PRT Systems Limited | 256 | — | 1 |
| AS219040GB | BREEZENODES Breezenodes Ltd | 256 | 2 | 3 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | 256 | — | 1 |
| AS51946GB | NEWCASTLE-UNI-NUSAJAYA-CAMPUS University of Newcastle upon Tyne | 256 | — | 1 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS8272GB | NETSCALIBUR-UK Claranet Limited | 256 | — | 1 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS199649GB | KTSTECH-AS KTS Technology Group Limited | 256 | 1 | 2 |
| AS57850GB | NWL-AS Northumbrian Water Ltd | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS205011GB | celertechuk Celer Technologies Limited | 256 | — | 1 |
| AS50391GB | DIVERGENT DIVERGENT NETWORKS LTD | 256 | 65.6K | 5 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 256 | — | 1 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS212705GB | TIG-Network TIG Management Services Limited | 256 | 524.3K | 2 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS204757GB | ReactiveMarkets Reactive Markets Limited | 256 | — | 1 |
| AS211049GB | DHSC-ARP Department of Health and Social Care | 256 | — | 1 |
| AS218757GB | MyCheapHost MYCHEAP LTD | 256 | — | 1 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS6540GB | SAMUEL-COSGROVE Samuel Cosgrove | 256 | — | 1 |
| AS211829GB | Zaha ZHA ARCHITECTS LIMITED | 256 | — | 1 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | 256 | 1 | 2 |
| AS218736GB | H1CLOUD H1CLOUD LTD | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS51303GB | Warsaw IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS207536GB | SEABECKSOLUTIONS-AS SEABECK SOLUTIONS LIMITED | 256 | — | 1 |
| AS57138GB | DOH-MULLVAD LOCIX LIMITED | 256 | 65.5K | 2 |
| AS39461GB | BE-AS EDF ENERGY NUCLEAR GENERATION LIMITED | 256 | — | 1 |