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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| 512 |
| — |
| 2 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS137037GB | VEBBLEPVTLTD-AS-AP - VEBBLE PVT LTD. | 512 | 1 | 3 |
| AS218761GB | EXPERIAN_LD5_LD8 Experian International Unlimited | 512 | — | 2 |
| AS211077GB | HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | 512 | — | 2 |
| AS218531GB | wsd-as-uk WallStreetDocs Ltd | 512 | — | 2 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS211476GB | techloq-uk Techloq Limited | 512 | 65.5K | 3 |
| AS210282GB | FRONTIERDC-AS Frontier Technology Limited | 512 | — | 2 |
| AS213482GB | WATERFALL Waterfall Technologies Ltd | 512 | 4.2K | 12 |
| AS49607GB | AdvancePayment ZEMPLER BANK LIMITED | 512 | — | 2 |
| AS212646GB | SSLN-AS Sporting Solutions Services Limited | 512 | — | 2 |
| AS60464GB | SUPERNET-UK SUPERNET UK LIMITED | 512 | — | 2 |
| AS208026GB | LITTLEWOODS LITTLEWOODS LTD | 512 | — | 2 |
| AS60382GB | CRANLEIGH-AS Cranleigh School | 512 | — | 2 |
| AS218805GB | STACKLAYER-NET Stacklayer Communications Limited | 512 | 4.1K | 4 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS207900GB | uk_northrop_2 Northrop Grumman UK Limited | 512 | — | 2 |
| AS199262GB | TfL-FPS-AS Transport for London | 512 | — | 1 |
| AS219185GB | NARWHAL-NETTECH NARWHAL NETTECH LIMITED | 512 | 3 | 5 |
| AS214315GB | CUSHWAKE-IRE Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |
| AS199301GB | SOLUTIONS-AS RLE SOLUTIONS LTD | 512 | — | 2 |
| AS210415GB | ASVNK00056 LOBOS NETWORKING LTD | 512 | — | 2 |
| AS212601GB | Calastone Calastone Limited | 512 | — | 2 |
| AS212035GB | Babcock_International Babcock Corporate Services Ltd | 512 | — | 2 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS214260GB | ITCommunications I.T Communications Limited | 512 | — | 2 |
| AS201478GB | REDI_TECH Refinitiv Limited | 512 | — | 2 |
| AS59876GB | SHELFSPACE Thomas James Elliott | 512 | 1 | 3 |
| AS204624GB | sycurio Sycurio Limited | 512 | — | 2 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS216376GB | pinkfroot Pinkfroot Ltd | 512 | — | 1 |
| AS41493GB | CHI-X Cboe Europe Limited | 512 | — | 2 |
| AS212890GB | AetherCloud ONEMAN NETWORK LIMITED | 512 | 3 | 5 |
| AS211501GB | HIGHTIDEGROUP-AS High Tide Group Limited | 512 | 524.3K | 4 |
| AS214557GB | hostmenow HOSTMENOW LTD | 512 | — | 2 |
| AS213888GB | CharterDigital-AS CharterDigital Ltd | 512 | — | 2 |
| AS209260GB | SERVA-ONE-LTD SERVA ONE LTD | 512 | — | 2 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS208638GB | mimecast-it-corp Mimecast Services Limited | 512 | — | 2 |
| AS51845GB | WATERSTONS-AS WATERSTONS LIMITED | 512 | — | 2 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS51692GB | HyberHost Steven Smith trading as HyberHost | 512 | 33 | 5 |
| AS211431GB | AndrewA Andrew Aubury | 512 | 369 | 11 |
| AS49958GB | EVO-AS Evolution Gaming LTD | 512 | — | 2 |
| AS207673GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |