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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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| AS208160GB | PINKCONNECT-AS Southern Communications Ltd | — | — | 0 |
| AS203232GB | XENODE Xenode Ltd | — | — | 0 |
| AS203453GB | DiscountWebHosting RegXpress Ltd | — | — | 0 |
| AS201799GB | CISCO-CAAS-EU Cisco International Limited | — | — | 0 |
| AS199481GB | K3-RIPE-AS Node4 Hosting Limited | — | — | 0 |
| AS211097GB | EASYGO-AS EASYGO SOLUTIONS LP | — | — | 0 |
| AS48875GB | PANTOR-ENGINEERING-ASN Goldman Sachs International | — | — | 0 |
| AS199464GB | MCMAH McMahon (UK) Ltd. | — | — | 0 |
| AS215058GB | PLUMBERS-AS Internet Plumbers LTD | — | — | 0 |
| AS8550GB | LONAP-MLP LONAP Ltd | — | — | 0 |
| AS219149GB | INCIDENT The Incident Ltd | — | — | 0 |
| AS197839GB | RAXEL-AS RAXEL LIMITED | — | — | 0 |
| AS134458GB | EDGENAP1-AS-AP - EDGENAP LTD | — | — | 0 |
| AS40550GB | IIX-GTIIX-RS - IX Reach Ltd | — | — | 0 |
| AS8401GB | PROMONTORIA-AS Promontoria Ltd | — | — | 0 |
| AS31270GB | FMN GCI Network Solutions Limited | — | — | 0 |
| AS219541GB | STAUS-AS STAUS LTD | — | — | 0 |
| AS50534GB | VMO2 Virgin Media Limited | — | — | 0 |
| AS31487GB | VartecOnline TalkTalk Communications Limited | — | — | 0 |
| AS200099GB | ASN-EXTLIKES Extlikes UK Marketing Limited | — | — | 0 |
| AS218251GB | VPSUS-AS VPSUS NETWORKS LTD | — | — | 0 |
| AS201690GB | CallWithMe-AS CALLWITHME LTD. | — | — | 0 |
| AS5600GB | TCPNET-AS BNW TECHNOLOGY LTD | — | — | 0 |
| AS199398GB | LDNFLATS-AS LDNFLATS LTD | — | — | 0 |
| AS43255GB | FSA-UK-AS Assured Guaranty UK Limited | — | — | 0 |
| AS212177GB | AIRBYTES AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS12554GB | EASYNET-BE GTT - EMEA Ltd. | — | — | 0 |
| AS36287GB | IIX-BNIIX-RS - IX Reach Ltd | — | — | 0 |
| AS58052GB | VOLTERIC Volteric Limited | — | 1 | 1 |
| AS51063GB | FUJITSU Fujitsu Telecommunications Europe Ltd | — | — | 0 |
| AS208585GB | CSSUK Clear Street Services UK LTD | — | — | 0 |
| AS13218GB | INNOVISE-AS WorkWave UK LTD | — | — | 0 |
| AS49182GB | BTEngageIT British Telecommunications Limited | — | — | 0 |
| AS213854GB | RESURE RE:SURE INTELLIGENCE LTD | — | — | 0 |
| AS205464GB | dyfedit Voneus Ltd | — | — | 0 |
| AS219035GB | AHEADUK AHEAD UK Solutions Ltd | — | — | 0 |
| AS200167GB | excellondon London International Exhibition Centre PLC | — | — | 0 |
| AS218403GB | QUALITY-AS QUALITY SITES LIMITED | — | — | 0 |
| AS218312GB | AlienServers Alien Servers Ltd | — | — | 0 |
| AS43006GB | DIGITAL-REALTY-IE Digital Realty (UK) Limited | — | — | 0 |
| AS60257GB | OB-Telecom-Limited TalkTalk Communications Limited | — | — | 0 |
| AS215631GB | qxtellimited QXTEL Limited | — | — | 0 |
| AS50412GB | AES-AS Aspect Enterprise Solutions Limited | — | — | 0 |
| AS48910GB | INAP-FRA PACKETFABRIC (UK) LTD | — | — | 0 |
| AS28673GB | SIXDG-NWF Six Degrees Technology Group Limited | — | — | 0 |
| AS212018GB | GLFRASER Graeme Fraser | — | — | 0 |