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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 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | — | 1 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS206392GB | HACKWORTH_UK Hackworth Ltd | 256 | 48 | 3 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS202590GB | HACKLAB Edinburgh Hacklab Ltd | 256 | 1 | 2 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS215172GB | JIANYUELAB-AS JIANYUELAB LTD | 256 | 65.7K | 15 |
| AS58117GB | TOUCHTEC TouchTec Technology Limited | 256 | — | 1 |
| AS219412GB | Oxiwave-Internet Lewis Brown | 256 | 74.3K | 14 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS213755GB | LUNORY-AS LUNORY CLOUD SOLUTIONS LTD | 256 | — | 1 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS209750GB | MBX-AS MBX DIGITAL LIMITED | 256 | — | 1 |
| AS21464GB | EDF-AS EDF Trading Ltd | 256 | — | 1 |
| AS215419GB | karizanta Karizanta LTD | 256 | — | 1 |
| AS43059GB | iitss IT Support Services Team Limited | 256 | 1 | 2 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS202141GB | HALLHOST-AS Warren Hall | 256 | — | 1 |
| AS57138GB | DOH-MULLVAD LOCIX LIMITED | 256 | 65.5K | 2 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS198353GB | MIMEO-AS Mimeo Limited | 256 | — | 1 |
| AS214064GB | Kevin-Titmarsh Kevin Titmarsh | 256 | 1 | 2 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS197320GB | NPA-AS National Pharmacy Association Ltd | 256 | — | 1 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS219227GB | VANISH-CLOUD-AS VANISH CLOUD LTD | 256 | — | 1 |