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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 |
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| AS212475GB | COMCAST-UK Comcast International Holdings UK Limited | — | — | 0 |
| AS12640GB | COLT Technology Services Group Limited | — | — | 0 |
| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications Limited | — | — | 0 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS212177GB | AIRBYTES AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS203438GB | RGSL Regus Group Services Ltd | — | — | 0 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS197976GB | FAVBET-AS Favbet Invest LLP | — | — | 0 |
| AS197595GB | SEEKAHOST-TECH SEEKAHOST TECHNOLOGIES LTD | — | — | 0 |
| AS59839GB | BROMLEYNET Bromleynet Limited | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS219327GB | DISASTER Disaster Limited | — | 1 | 1 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS60036GB | DYFED-IT-SOLUTIONS Voneus Ltd | — | — | 0 |
| AS61135GB | TR-SUNUCUCOM TIGOVA NETWORK LIMITED | — | — | 0 |
| AS43629GB | VM-GCN Virgin Media Limited | — | — | 0 |
| AS42271GB | VANCO-UK-AS3 Flag Telecom UK Limited | — | — | 0 |
| AS35143GB | BICOMDOO Bicom Systems Limited | — | — | 0 |
| AS49738GB | NETROX-AS 3nt solutions LLP | — | — | 0 |
| AS212121GB | VAGUE James Ray | — | 4 | 4 |
| AS5519GB | Wavenet-AS5519 Wavenet Limited | — | — | 0 |
| AS212806GB | stratagem VeloxServ Communications Ltd | — | 64 | 1 |
| AS60477GB | SIXDG-INSITE Six Degrees Technology Group Limited | — | — | 0 |
| AS49512GB | EVERMERE Evermere Capital Management Ltd | — | — | 0 |
| AS207427GB | IBILLY-MEDIA-GROUP-LTD IBILLY MEDIA GROUP LTD | — | — | 0 |
| AS208051GB | SR2COM SR2 Communications Limited | — | 32 | 2 |
| AS43433GB | MICROFROST Christopher Frost | — | — | 0 |
| AS25127GB | BTOW British Telecommunications Limited | — | — | 0 |
| AS31422GB | AONUK-AS AON UK LIMITED | — | — | 0 |
| AS8844GB | COMMUNITY GTT - EMEA Ltd. | — | — | 0 |
| AS8689GB | POWERNETUK Digital Space Group Limited | — | — | 0 |
| AS29297GB | linkconnect-as Southern Communications Ltd | — | — | 0 |
| AS15463GB | NETWORKI-AS Virtustream UK Ltd | — | — | 0 |
| AS214811GB | BetInvest-AS Bet Invest LTD | — | — | 0 |
| AS205265GB | KADFIRE-SEC Kadfire Limited | — | — | 0 |
| AS60977GB | NVIDIA-NGN NVIDIA Ltd | — | — | 0 |
| AS203056GB | TTBNGVS TalkTalk Communications Limited | — | — | 0 |
| AS199035GB | Olcus-Limited Olcus Limited | — | — | 0 |
| AS198722GB | TXRX-AS 1310 Limited | — | — | 0 |
| AS202519GB | WG-PSBA Welsh Government | — | — | 0 |
| AS13218GB | INNOVISE-AS WorkWave UK LTD | — | — | 0 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS210870GB | NETJETT NETJETT LTD | — | — | 0 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |