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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,127 |
| 256 |
| 369 |
| 10 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS41380GB | ALD-AS Ald Automotive Ltd | 256 | — | 1 |
| AS29200GB | ESEYE Eseye Ltd | 256 | 524.3K | 2 |
| AS49967GB | MTVH THAMES VALLEY HOUSING ASSOCIATION LIMITED | 256 | — | 1 |
| AS207734GB | Quika COMMERCIS ME LTD | 256 | — | 1 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS215497GB | Tivarri Tivarri Limited | 256 | — | 1 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS212419GB | SALMON-AS Wunderman Thompson Commerce UK Ltd | 256 | — | 1 |
| AS204979GB | LINX-SCO1 London Internet Exchange Ltd. | 256 | 1 | 2 |
| AS47744GB | ANNECTO-AS XTEND SOLUTIONS LTD | 256 | — | 1 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS199649GB | KTSTECH-AS KTS Technology Group Limited | 256 | 1 | 2 |
| AS199738GB | VATORA VATORA LIMITED | 256 | 65.5K | 2 |
| AS59617GB | ANDYD Andy Davidson | 256 | 1 | 2 |
| AS211188GB | ASBTSLTD Business Teleports and Solutions Limited | 256 | — | 1 |
| AS216014GB | BestDC-Limited BestDC Limited | 256 | — | 1 |
| AS209870GB | Cylo Cylo Ltd | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS201676GB | WAGHORN-CAPITAL-CO WAGHORN CAPITAL CO LTD | 256 | — | 1 |
| AS197924GB | DARKLESS Darkless Ltd | 256 | — | 1 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | 256 | — | 1 |
| AS203961GB | CentralNic-Anycast-G CentralNic Ltd | 256 | 1 | 2 |
| AS47534GB | VocaLink-north-Ltd VOCALINK LTD | 256 | — | 1 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS197167GB | EURALB-ASN Euralb Ltd | 256 | — | 1 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS202590GB | HACKLAB Edinburgh Hacklab Ltd | 256 | 1 | 2 |
| AS198628GB | FIDESSA-AS FIDESSA TRADING UK LIMITED | 256 | — | 1 |
| AS42044GB | CENTRALNIC CentralNic Ltd | 256 | 1 | 2 |
| AS44782GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS20915GB | HUNDRED-PERCENT-IT CYBERHIVE LTD | 256 | — | 1 |
| AS210549GB | CDW-IT-INFRA CDW Ltd | 256 | — | 1 |
| AS35200GB | TransitX-Ltd TransitX Ltd | 256 | — | 1 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS213646GB | monkey-tree-hosting Monkey Tree Hosting Limited | 256 | 131.1K | 3 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS15752GB | BP-US-1 BP International Ltd | 256 | — | 1 |
| AS215833GB | AblativeConsulting Ablative Consulting Ltd | 256 | 1 | 2 |
| AS8272GB | NETSCALIBUR-UK Claranet Limited | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |