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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 331 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| — |
| 1 |
| AS48375GB | TIBRA-LC-AS Tibra Trading Europe Limited | 256 | — | 1 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS197320GB | NPA-AS National Pharmacy Association Ltd | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS199794GB | EMO-AS EMOCLOUD LTD | 256 | 272 | 3 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS202400GB | TAIPEI101-NETWORK-LLC TAIPEI101 NETWORK LTD | 256 | 6 | 7 |
| AS58007GB | Witine Witine Limited | 256 | — | 1 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS203076GB | ORG-NL671-RIPE NeighbourFibre Ltd | 256 | — | 1 |
| AS15992GB | VISA-EUROPE Visa Europe Limited | 256 | — | 1 |
| AS215172GB | JIANYUELAB-AS JIANYUELAB LTD | 256 | 65.7K | 18 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS200581GB | TFWFIBRE-ASN TfW Fibre Ltd | 256 | 524.3K | 2 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS214451GB | R3ido101 Oliver Reid | 256 | 131.1K | 6 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | 1 | 2 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS47578GB | PRT-ANYCAST PRT Systems Limited | 256 | — | 1 |
| AS211409GB | PrimeFilter FoxiBytes LTD | 256 | — | 1 |
| AS49448GB | PICO_UK PICO GLOBAL LTD. | 256 | — | 1 |
| AS48686GB | SOLTECH-ASN oRe Networks Limited | 256 | 1 | 2 |
| AS206071GB | EA-DE-COLOGNE Electronic Arts Limited | 256 | — | 1 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | 256 | — | 1 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS51692GB | HyberHost Steven Smith trading as HyberHost | 256 | 19 | 5 |
| AS42359GB | WEMBLEY-AS The Football Association Ltd. | 256 | — | 1 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS208098GB | GPS THREDD UK LIMITED | 256 | — | 1 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 256 | 10 | 4 |
| AS213436GB | NIUZI_DADA_CLOUD NIUZI DADA CLOUD LIMITED | 256 | 4.9K | 8 |