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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS201060GB | snetterton SNETTERTON TELECOM LIMITED | 1K | — | 4 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS205106GB | PEASOUP Pea Soup Hosting Limited | 1K | — | 3 |
| AS199788GB | MPS Motion Picture Solutions Limited | 1K | — | 1 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS50882GB | MAXNETT Maxnett Ltd. | 1K | — | 1 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS44052GB | PRESSCOMPUTER-ASN ICONIC MEDIA SYSTEMS LIMITED | 1K | — | 3 |
| AS197282GB | WGMAST Wood Group UK Limited | 1K | — | 4 |
| AS197594GB | REDSTOR-AS Redstor Limited | 1K | — | 4 |
| AS206984GB | lypy Lypy Limited | 1K | 524.3K | 3 |
| AS59439GB | VOICEFACTORY-AS EvolveIP LTD | 1K | 0 | 2 |
| AS213183GB | WHG-LUX WHG Hosting Services Ltd | 1K | — | 3 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS210805GB | openinfra-isp-production-uk Open Infra ltd | 1K | 65.5K | 5 |
| AS204939GB | TAC-COMMUNICATIONS-UK TAC COMMUNICATIONS LTD | 1K | 524.3K | 2 |
| AS215286GB | IXROOT IXROOT LTD | 1K | — | 4 |
| AS205565GB | BASETELECOMMUNICATIONSLLP Base Telecommunications LLP | 1K | 524.3K | 2 |
| AS43442GB | PROVU ProVu Communications Ltd | 1K | 1 | 2 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS209113GB | PRECEDENCE Precedence Technologies Ltd | 1K | — | 3 |
| AS33968GB | InternetEngineeringAS EASYSPACE LIMITED | 1K | — | 1 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS198723GB | UNI-READING University of Reading | 1K | 1 | 4 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS60237GB | theWestBrom WEST BROMWICH BUILDING SOCIETY FOUNDATION | 1K | — | 1 |
| AS201903GB | EVORIO-AS Evorio Limited | 1K | — | 1 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS209447GB | RETN-TR-AS RETN Limited | 1K | — | 1 |
| AS202114GB | Blue_Sky_Systems Blue Sky Systems Limited | 1K | 65.5K | 5 |
| AS6759GB | IOTX Pelion IoT Limited | 1K | — | 4 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS201664GB | netwarm NetWarm LTD | 1K | — | 4 |
| AS203573GB | tmcs Tailor Made Technologies Ltd | 1K | — | 1 |
| AS207827GB | CSL-IOT CSL (DualCom) Limited | 1K | — | 3 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS206246GB | Formosa FORMOSA CAPITAL LP | 1K | 131.1K | 6 |
| AS56670GB | WSCC-AS West Sussex County Council | 1K | — | 2 |
| AS204486GB | CHES-EAST Cheshire East Council | 1K | — | 1 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1K | — | 4 |
| AS62145GB | Bango BANGO.NET Ltd | 1K | — | 4 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |
| AS60282GB | COVCITYCOUNCIL Coventry City Council | 1K | — | 1 |
| AS201289GB | ESENDEX COMMIFY UK LIMITED | 1K | — | 1 |