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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 | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,127 |
| 256 |
| — |
| 1 |
| AS202400GB | TAIPEI101-NETWORK-LLC TAIPEI101 NETWORK LTD | 256 | 1 | 2 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS52024GB | kwik-fit-gb KWIK-FIT (GB) Limited | 256 | — | 1 |
| AS216121GB | VALKYRIEHOSTING-AS Valkyrie Hosting LTD | 256 | — | 1 |
| AS211175GB | gigapeak Caudata Ltd | 256 | 524.3K | 2 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS51047GB | TURTLE-NET Turtle Networks Ltd | 256 | — | 1 |
| AS214294GB | NoobNet NOOB RP LTD | 256 | 2 | 3 |
| AS207155GB | STORMNET Stormnet Hosting LTD | 256 | 1 | 2 |
| AS209553GB | NETVAZ NETVAZ LIMITED | 256 | 1 | 2 |
| AS207748GB | FRASER-AS Stephen Fraser | 256 | 275 | 6 |
| AS214424GB | NFORTO-AS nForto Ltd | 256 | — | 1 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS30894GB | SINCH-MBLOX-AS SINCH UK LTD. | 256 | — | 1 |
| AS47255GB | MCDEU02 MCD Europe Limited | 256 | — | 1 |
| AS209999GB | ARL Ascot Racecourse Ltd | 256 | — | 1 |
| AS47534GB | VocaLink-north-Ltd VOCALINK LTD | 256 | — | 1 |
| AS213525GB | McLarenApplied Motion Applied Limited | 256 | 1 | 2 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS206146GB | PSND-UK PAYSEND TECHNOLOGY LIMITED | 256 | — | 1 |
| AS214451GB | R3ido101 Oliver Reid | 256 | 131.1K | 3 |
| AS41553GB | Reed-Managed-Services Reed Specialist Recruitment Limited | 256 | — | 1 |
| AS16238GB | TELECOM2-AS Telecom2 Ltd. | 256 | — | 1 |
| AS212606GB | DiPocket DiPocket Limited | 256 | — | 1 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS211118GB | SERMODK WORLDONE RESEARCH LIMITED | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS198063GB | DWIN-AS AWIN LTD | 256 | — | 1 |
| AS212733GB | Netquirk Netquirk Limited | 256 | — | 1 |
| AS209669GB | PRIMONET-AS Ashley Primo | 256 | 3 | 4 |
| AS44697GB | C3-UK Computer & Communication Co. Limited | 256 | — | 1 |
| AS214162GB | MERLIN Merlin Telecommunications Ltd | 256 | — | 1 |
| AS198189GB | STEALTHVM Throttle Limited | 256 | 1 | 2 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect LtD | 256 | 59 | 15 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS207477GB | PEACHY PEACHY SERVERS LIMITED | 256 | 65.5K | 2 |
| AS209997GB | securitas-uk-as-sms SECURITAS TECHNOLOGY LIMITED | 256 | — | 1 |
| AS204979GB | LINX-SCO1 London Internet Exchange Ltd. | 256 | 1 | 2 |
| AS47791GB | EA-FI-HELSINKI Electronic Arts Limited | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 256 | 131.1K | 3 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS59783GB | SBIX-DUS ONESAVINGS BANK PLC | 256 | — | 1 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |