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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 |
| 256 |
| — |
| 1 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS57138GB | DOH-MULLVAD LOCIX LIMITED | 256 | 65.5K | 2 |
| AS205011GB | celertechuk Celer Technologies Limited | 256 | — | 1 |
| AS213525GB | McLarenApplied Motion Applied Limited | 256 | 1 | 2 |
| AS52024GB | kwik-fit-gb KWIK-FIT (GB) Limited | 256 | — | 1 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS206664GB | FlextradeUK-2 FLEXTRADE UK LIMITED | 256 | — | 1 |
| AS199735GB | Inclusive-Bytes-CIC Inclusive Bytes C.I.C | 256 | 2 | 3 |
| AS219172GB | VUNIFY VUNIFY LTD | 256 | — | 1 |
| AS211118GB | SERMODK WORLDONE RESEARCH LIMITED | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS58226GB | PHUSIONIM Phusion IM Limited | 256 | — | 1 |
| AS207960GB | AS-TRANSRIGHTS AS207960 Cyfyngedig | 256 | 7 | 8 |
| AS206033GB | REPOXLABS Repox Labs Ltd | 256 | — | 1 |
| AS198337GB | DATAART-LVIV DataArt Technologies UK Ltd | 256 | — | 1 |
| AS219185GB | NARWHAL-NETTECH NARWHAL NETTECH LIMITED | 256 | 3 | 4 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS209540GB | EXPEDIA-DUBLIN Expedia.com Ltd. | 256 | — | 1 |
| AS200597GB | DIGITALK-SG1 DIGITALK Limited | 256 | — | 1 |
| AS201353GB | CuTEL Matthew Harrold | 256 | 1 | 2 |
| AS201323GB | host-media-ltd Host Media Ltd | 256 | 65.5K | 2 |
| AS212419GB | SALMON-AS Wunderman Thompson Commerce UK Ltd | 256 | — | 1 |
| AS211067GB | LEC Eastbourne Borough Council | 256 | — | 1 |
| AS196839GB | VU-AS Amplefuture Group Limited | 256 | — | 1 |
| AS50888GB | MINOTAUR-ASN Minotaur I.T. Limited | 256 | — | 1 |
| AS34625GB | OSHS-AS OSHS Ltd | 256 | — | 1 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | — | 1 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS44426GB | SYNECTICS-AS Synectics Solutions Ltd | 256 | — | 1 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS199649GB | KTSTECH-AS KTS Technology Group Limited | 256 | 1 | 2 |
| AS42479GB | KWW-UK-AS KLDiscovery Limited | 256 | — | 1 |
| AS47791GB | EA-FI-HELSINKI Electronic Arts Limited | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS204979GB | LINX-SCO1 London Internet Exchange Ltd. | 256 | 1 | 2 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS33854GB | HOSTIT-AS-NN Nuco Technologies Ltd | 256 | — | 1 |
| AS203001GB | GateX GateX LIMITED | 256 | — | 1 |