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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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| AS204069GB | AG-Host AG Host LTD | — | — | 0 |
| AS203910GB | JTC-NET Jenson Cornhill | — | — | 0 |
| AS202455GB | CUSHWAKE-NL Cushman & Wakefield Debenham Tie Leung Limited | — | — | 0 |
| AS207200GB | Krisdev Kristian Hoyle-Johnson | — | — | 0 |
| AS201930GB | ASN-TVAT VERTALA LTD | — | — | 0 |
| AS201690GB | CallWithMe-AS CALLWITHME LTD. | — | — | 0 |
| AS15727GB | KEME-IPSWICH Digital Space Group Limited | — | — | 0 |
| AS208533GB | CSSUK Clear Street Services UK LTD | — | — | 0 |
| AS201580GB | Secunia Flexera Software Limited | — | — | 0 |
| AS44218GB | CTBY-ASN China Telecom Europe Ltd. | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS213289GB | iqvia Redcentric Solutions Ltd | — | — | 0 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS218191GB | MOOREQUALITY-AS MOORE QUALITY ENGINEERING LTD | — | — | 0 |
| AS210377GB | sift-ltd Sift Ltd | — | — | 0 |
| AS43157GB | URBANWIMAX-NET Telcom Networks Limited | — | — | 0 |
| AS208386GB | coast-uk Coast Connect Ltd | — | — | 0 |
| AS208160GB | PINKCONNECT-AS Southern Communications Ltd | — | — | 0 |
| AS205932GB | TerraNetUK TerraNet Ltd | — | — | 0 |
| AS218282GB | WESTTECH-AS WESTTECH LTD | — | — | 0 |
| AS198276GB | ARPERLA Jordan Robert | — | 2 | 2 |
| AS203465GB | HEIDMAR-CORE Heidmar UK Limited | — | — | 0 |
| AS200769GB | SDCN1 BORDERS ONLINE LTD | — | — | 0 |
| AS212180GB | ERL-HSCN Everlight Radiology Limited | — | — | 0 |
| AS219356GB | TOLLON Tollon Limited | — | — | 0 |
| AS198653GB | SOLARAPPS-AS SOLARAPPS LTD | — | — | 0 |
| AS206976GB | KADFIRE Kadfire Limited | — | — | 0 |
| AS198382GB | FIRSTEASY-AS Datum Datacentres Limited | — | — | 0 |
| AS203438GB | RGSL Regus Group Services Ltd | — | — | 0 |
| AS218777GB | STARIX Star Europe Limited | — | — | 0 |
| AS219149GB | INCIDENT The Incident Ltd | — | — | 0 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS48493GB | TFMNET-AS TFM NETWORKS LIMITED | — | — | 0 |
| AS12641GB | BT_MPLS British Telecommunications Limited | — | — | 0 |
| AS206097GB | gameshield GAMESHIELD LIMITED | — | — | 0 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS43207GB | QUICKLINE Quickline Communications Limited | — | — | 0 |
| AS47693GB | LEGENDCOM Talk Straight Ltd. | — | — | 0 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS219245GB | DECENTRALIA-ASN DECENTRALIA LIMITED | 256 | — | 1 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |