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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 |
| 256 |
| — |
| 1 |
| AS197387GB | Betfair-DC3 The Sporting Exchange (Clients) Ltd | 256 | — | 1 |
| AS219380GB | ADNAANSIDDIQI Adnaan Siddiqi | 256 | 1 | 2 |
| AS204821GB | Sinofibre Sinofibre Limited | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS61283GB | MILLAR Andrew Millar Ltd | 256 | 1 | 2 |
| AS209503GB | Zentyx Zentyx Limited | 256 | — | 1 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS200581GB | TFWFIBRE-ASN TfW Fibre Ltd | 256 | 524.3K | 2 |
| AS200027GB | RDA-TELECOM RDA GROUP LIMITED | 256 | 1 | 2 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS210549GB | CDW-IT-INFRA CDW Ltd | 256 | — | 1 |
| AS214188GB | VoltHosting VoltHosting Ltd | 256 | 256 | 2 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS210938GB | whitbread Whitbread Group PLC | 256 | — | 1 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS206457GB | EA-IE-GALWAY Electronic Arts Limited | 256 | — | 1 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS42460GB | Euralb_ASN Euralb-LTD | 256 | — | 1 |
| AS211165GB | asbattyhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS209297GB | AS-NICHI-YOROZUYA NICHI YOROZUYA LTD | 256 | 33 | 4 |
| AS211339GB | VORTIA Vortia Ltd | 256 | — | 1 |
| AS219414GB | Taylor-Wimpey Taylor Wimpey PLC | 256 | — | 1 |
| AS50391GB | DIVERGENT DIVERGENT NETWORKS LTD | 256 | 65.6K | 5 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS208147GB | Snuggle Evie Snuggle | 256 | 1 | 2 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS197320GB | NPA-AS National Pharmacy Association Ltd | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS218482GB | PSYCHOVPS PSYCHOVPS LTD | 256 | 16 | 2 |
| AS61427GB | SARGASSO-DC-AS Sargasso N1 Limited | 256 | — | 1 |
| AS42330GB | UNCHAINEDISP Unchained ISP Limited | 256 | — | 1 |
| AS209540GB | EXPEDIA-DUBLIN Expedia.com Ltd. | 256 | — | 1 |
| AS51953GB | sciencegroup-uk Sagentia Ltd | 256 | — | 1 |
| AS42465GB | FORCEPOINT-ANYCAST-AS Forcepoint UK Limited | 256 | — | 1 |
| AS41380GB | ALD-AS Ald Automotive Ltd | 256 | — | 1 |
| AS218513GB | STPD-NETWORK Joshua Noakes | 256 | 2 | 3 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS51946GB | NEWCASTLE-UNI-NUSAJAYA-CAMPUS University of Newcastle upon Tyne | 256 | — | 1 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |