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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 1K |
| — |
| 4 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS204264GB | PUREIP Pure IP Limited | 1K | — | 1 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS210805GB | openinfra-isp-production-uk Open Infra ltd | 1K | 65.5K | 5 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS205402GB | INTERCITY-TECH-THN Intercity Technology Ltd | 1K | — | 4 |
| AS202787GB | withers-global Withers LLP | 1K | — | 4 |
| AS60011GB | MYTHIC-BEASTS-USA Mythic Beasts Ltd | 1K | 131.1K | 6 |
| AS208636GB | SDC SDC Hosting and Support Ltd | 1K | — | 4 |
| AS41232GB | beeline Beeline Broadband Ltd | 1K | — | 1 |
| AS60237GB | theWestBrom WEST BROMWICH BUILDING SOCIETY FOUNDATION | 1K | — | 1 |
| AS50882GB | MAXNETT Maxnett Ltd. | 1K | — | 1 |
| AS201060GB | snetterton SNETTERTON TELECOM LIMITED | 1K | — | 4 |
| AS202907GB | ATOMICIT Atomic IT Limited | 1K | 524.3K | 2 |
| AS60060GB | AECOM-EMEA AECOM Limited | 1K | — | 1 |
| AS205804GB | DELTAV Delta V Technologies Limited | 1K | 65.5K | 10 |
| AS200870GB | RTSL_AS Retail Technology Services Ltd | 1K | — | 3 |
| AS204414GB | OXAM The OxFORD Asset Management Company Limited | 1K | — | 1 |
| AS25030GB | NFU-AS National Farmers Union Mutual Insurance Society Ltd | 1K | — | 3 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS206690GB | BFC-FR2 Beeks Financial Cloud Ltd | 1K | — | 4 |
| AS8577GB | xygnition XYGNITION RESEARCH LIMITED | 1K | — | 1 |
| AS47492GB | CONSIDERIT Consider IT Limited | 1K | — | 4 |
| AS206984GB | lypy Lypy Limited | 1K | 524.3K | 3 |
| AS197594GB | REDSTOR-AS Redstor Limited | 1K | — | 4 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS207827GB | CSL-IOT CSL (DualCom) Limited | 1K | — | 3 |
| AS60193GB | wurzel Wurzel Ltd | 1K | 524.3K | 5 |
| AS20832GB | FUSE2 Southern Communications Ltd | 1K | — | 1 |
| AS51221GB | LMAX-HOSTING LMAX Limited | 1K | — | 1 |
| AS62195GB | STANTEC-UK-AS Stantec UK Limited | 1K | 1 | 2 |
| AS59676GB | NETWORKSERVICES-SEC Network Services Ltd. | 1K | 2 | 6 |
| AS60282GB | COVCITYCOUNCIL Coventry City Council | 1K | — | 1 |
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |
| AS203573GB | tmcs Tailor Made Technologies Ltd | 1K | — | 1 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 589.8K | 6 |
| AS214116GB | AcoraAPC2-AS Acora Limited | 1K | — | 1 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS204116GB | HOSTRELAY-AS HOSTRELAY GLOBAL LTD | 1K | — | 4 |
| AS205767GB | Spectron-Services Spectron Services Limited | 1K | — | 1 |
| AS212890GB | AetherCloud ONEMAN NETWORK LIMITED | 1K | 5 | 9 |
| AS43442GB | PROVU ProVu Communications Ltd | 1K | 1 | 2 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS210279GB | DMT DIGITAL MEDIA TECHNOLOGIES LTD | 1K | — | 1 |
| AS205996GB | Interfiber Interfiber Ltd | 1K | 65.5K | 2 |
| AS61281GB | NDT-AS Chess Limited | 1K | — | 1 |