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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 |
| BinkNet Bink Group Ltd |
| 512 |
| — |
| 1 |
| AS43669GB | ACSL2 Axia Computer Systems Limited | 512 | — | 2 |
| AS210404GB | TUNSTALL-UK Tunstall Healthcare (UK) Limited | 512 | — | 2 |
| AS208781GB | UK-SMARTCT1-20190320 SMART CT LIMITED | 512 | — | 1 |
| AS208638GB | mimecast-it-corp Mimecast Services Limited | 512 | — | 2 |
| AS59876GB | SHELFSPACE Thomas James Elliott | 512 | 1 | 3 |
| AS201478GB | REDI_TECH Refinitiv Limited | 512 | — | 2 |
| AS203652GB | IBMUK IBM United Kingdom Limited | 512 | — | 2 |
| AS47535GB | javelinbroadband JAVELIN BROADBAND LIMITED | 512 | — | 2 |
| AS203767GB | CLARITAS-A Claritas Solutions Limited | 512 | — | 2 |
| AS208915GB | HyperLink HYPERLXC MEDICAL LTD | 512 | 65.5K | 6 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS197213GB | NINETY-ONE-TELECOM 91TELECOM LTD | 512 | 17 | 4 |
| AS56644GB | SYNFS-AS Fundtech Financial Messaging Ltd | 512 | — | 2 |
| AS9090GB | PRNE PR Newswire Europe Ltd. | 512 | — | 2 |
| AS214555GB | Treasury Treasury Limited | 512 | 524.3K | 10 |
| AS212158GB | TransFICC TransFICC Ltd. | 512 | — | 2 |
| AS206924GB | BENJOJONET Ben Cartwright-Cox | 512 | 9 | 11 |
| AS218805GB | STACKLAYER-NET Stacklayer Communications Limited | 512 | 4.1K | 4 |
| AS219236GB | WGL Wolf Girls Limited | 512 | 1 | 3 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS212797GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS42635GB | AS-RCKR CARDOCK HOSTING LIMITED | 512 | — | 2 |
| AS41570GB | SSVC-AS BFBS | 512 | — | 2 |
| AS214455GB | RETN-AE-AS RETN Limited | 512 | — | 1 |
| AS212035GB | Babcock_International Babcock Corporate Services Ltd | 512 | — | 2 |
| AS210415GB | ASVNK00056 LOBOS NETWORKING LTD | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS39150GB | HOSTING-TELECOM-AS HOSTING TELECOM LTD | 512 | 327.7K | 7 |
| AS211431GB | AndrewA Andrew Aubury | 512 | 369 | 11 |
| AS218316GB | SPACECORE SPACECORE SOLUTION LTD | 512 | 2 | 4 |
| AS210203GB | RETN-IT-AS RETN Limited | 512 | — | 1 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS207673GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS216338GB | intelegro INTELEGRO LIMITED | 512 | — | 2 |
| AS213534GB | GardnersBooks Gardners Books Ltd | 512 | — | 2 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS28914GB | WIRENINE-AS Wireless Logic Limited | 512 | — | 2 |
| AS207173GB | uk_northrop Northrop Grumman UK Limited | 512 | — | 2 |
| AS214314GB | CUSHWAKE-UK2 Cushman & Wakefield Debenham Tie Leung Limited | 512 | — | 2 |
| AS214260GB | ITCommunications I.T Communications Limited | 512 | — | 2 |
| AS212646GB | SSLN-AS Sporting Solutions Services Limited | 512 | — | 2 |
| AS211077GB | HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | 512 | — | 2 |
| AS197560GB | VDIS Beeks Financial Cloud Ltd | 512 | — | 2 |