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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 |
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| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS33898GB | TMOBILE-AS EE Limited | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications Limited | — | — | 0 |
| AS198557GB | ONETTL George French | — | — | 0 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS212426GB | FWNETWORKS-AS Hey Broadband LTD | — | — | 0 |
| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS212295GB | HEYBAS2 Hey Broadband LTD | — | — | 0 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS208442GB | ITCOM UK Intis Telecom LTD | — | — | 0 |
| AS216055GB | blue Wren Olivia Wood | — | 1 | 1 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS61135GB | TR-SUNUCUCOM TIGOVA NETWORK LIMITED | — | — | 0 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS44981GB | Oosha Oosha Ltd | — | — | 0 |
| AS44402GB | GFINET-AS GFI Holdings Limited | — | — | 0 |
| AS39139GB | Menzies-Aviation-PLC-AS Menzies Aviation Plc | — | — | 0 |
| AS51805GB | cantab Gam Systematic LLP | — | — | 0 |
| AS201824GB | stat-cons-as STAT CONSULTING LTD | — | 1 | 1 |
| AS8576GB | CW-ASPAC Vodafone Limited | — | — | 0 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS59426GB | ISP-INTEXON-LTD INTEXON LTD | — | — | 0 |
| AS47947GB | WEHANDS-AS 3nt solutions LLP | — | — | 0 |
| AS202937GB | uk-scripps Discovery Corporate Services Limited | — | — | 0 |
| AS209507GB | REALLY-AWESOME-TECHNOLOGY Really Awesome Technology LTD | — | 1 | 1 |
| AS15463GB | NETWORKI-AS Virtustream UK Ltd | — | — | 0 |
| AS218518GB | lebaraeu Lebara Ltd | — | — | 0 |
| AS49374GB | BFD-IX Konstantin Verba | — | — | 0 |
| AS213526GB | SECURY SECURY INFORMATION TECHNOLOGIES LTD | — | — | 0 |
| AS213112GB | IPMultihome IP Multihome Limited | — | — | 0 |
| AS206269GB | Vantage-GB John Hillman | — | — | 0 |
| AS218197GB | ESCAPECLOUD-AS ESCAPE CLOUD LTD | — | — | 0 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | — | — | 0 |
| AS44874GB | VORBOSS-RD Vorboss Limited | — | — | 0 |
| AS199423GB | nexttranslate-as NEXTTRANSLATE LTD | — | — | 0 |
| AS16166GB | ASWORLDPAY2 WorldPay (UK) Limited | — | — | 0 |
| AS6763GB | SKY-GROUP-BACKBONE-AS Sky UK Limited | — | — | 0 |
| AS215159GB | RokosServicesUK Rokos Services (UK) Limited | — | — | 0 |
| AS60440GB | DRUK DEFAULTROUTE LIMITED | — | — | 0 |
| AS59566GB | LogicForge LogicForge Limited | — | 8.2K | 1 |
| AS213502GB | Wintermute-Trading-LTD WINTERMUTE TRADING LTD | — | — | 0 |
| AS43336GB | ASPIXIE PIXIE NETWORKS LTD | — | 524.3K | 1 |