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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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| AS50534GB | VMO2 Virgin Media Limited | — | — | 0 |
| AS204037GB | qernal Qernal LTD | — | — | 0 |
| AS201690GB | CallWithMe-AS CALLWITHME LTD. | — | — | 0 |
| AS48961GB | WarwickNet Glide Student & Residential Limited | — | 65.5K | 1 |
| AS43629GB | VM-GCN Virgin Media Limited | — | — | 0 |
| AS213660GB | elisamurphy Elisa Murphy | — | — | 0 |
| AS212391GB | CentralNic-Anycast-K CentralNic Ltd | — | — | 0 |
| AS211284GB | JOSH_MILES Joshua Miles | — | — | 0 |
| AS211209GB | EUROPEANEDGE-IX AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS209149GB | SEEKAHOST SEEKAHOST LTD | — | — | 0 |
| AS197839GB | RAXEL-AS RAXEL LIMITED | — | — | 0 |
| AS206335GB | HUDSON-GLOBAL-RESOURCES-LTD Morgan Philips UK Limited | — | — | 0 |
| AS205383GB | PERRYNET Rhys Perry | — | — | 0 |
| AS201467GB | TT Trillium Property Services Limited | — | — | 0 |
| AS210425GB | Equiniti Equiniti Services Limited | — | — | 0 |
| AS203232GB | XENODE Xenode Ltd | — | — | 0 |
| AS201799GB | CISCO-CAAS-EU Cisco International Limited | — | — | 0 |
| AS199481GB | K3-RIPE-AS Node4 Hosting Limited | — | — | 0 |
| AS199464GB | MCMAH McMahon (UK) Ltd. | — | — | 0 |
| AS211511GB | JIDO Jido Ltd | — | — | 0 |
| AS134458GB | EDGENAP1-AS-AP - EDGENAP LTD | — | — | 0 |
| AS57751GB | packets_global Andrews & Arnold Ltd | — | — | 0 |
| AS56614GB | FRESHFIELDS-ASN Freshfields Bruckhaus Deringer LLP | — | — | 0 |
| AS25061GB | ANLX-UK Associated Networks (UK) Limited | — | — | 0 |
| AS8656GB | PSINetEurope TELSTRA UK LIMITED | — | — | 0 |
| AS8472GB | BT-GERMANY-NGN British Telecommunications Limited | — | — | 0 |
| AS219226GB | Metro-Fabric METRO FABRIC LIMITED | — | — | 0 |
| AS203237GB | Vodafone-UK-Cloud-Connect Vodafone Limited | — | — | 0 |
| AS40550GB | IIX-GTIIX-RS - IX Reach Ltd | — | — | 0 |
| AS203812GB | GlobalDirectDeliveryLtd High Availability Hosting Limited | — | — | 0 |
| AS200642GB | CAVL-AS Cavellon Ltd. | — | — | 0 |
| AS199186GB | daniel Daniel Thomas Atkinson | — | — | 0 |
| AS207328GB | THRIVE-UK2 THRIVE OPERATIONS LIMITED | — | — | 0 |
| AS62346GB | XTRAKTER-LTD-ASN MARKETAXESS POST-TRADE LIMITED | — | — | 0 |
| AS56328GB | VNP VNP DIGITAL Ltd. | — | — | 0 |
| AS51063GB | FUJITSU Fujitsu Telecommunications Europe Ltd | — | — | 0 |
| AS43255GB | FSA-UK-AS Assured Guaranty UK Limited | — | — | 0 |
| AS58052GB | VOLTERIC Volteric Limited | — | 1 | 1 |
| AS31487GB | VartecOnline TalkTalk Communications Limited | — | — | 0 |
| AS8401GB | PROMONTORIA-AS Promontoria Ltd | — | — | 0 |
| AS5600GB | TCPNET-AS BNW TECHNOLOGY LTD | — | — | 0 |
| AS219035GB | AHEADUK AHEAD UK Solutions Ltd | — | — | 0 |
| AS218403GB | QUALITY-AS QUALITY SITES LIMITED | — | — | 0 |
| AS218312GB | AlienServers Alien Servers Ltd | — | — | 0 |
| AS215631GB | qxtellimited QXTEL Limited | — | — | 0 |
| AS212018GB | GLFRASER Graeme Fraser | — | — | 0 |