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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 |
| 2 |
| 6 |
| AS212032GB | DirectPath-Communications-Limited DirectPath Communications Limited | 1K | 4.1K | 5 |
| AS206289GB | sabis TSB BANKING GROUP LIMITED | 1K | — | 4 |
| AS214480GB | Innova-Communications Innova Communications Limited | 1K | 285 | 33 |
| AS200124GB | FLEXUK-AS FLEXTRADE UK LIMITED | 1K | — | 4 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS200870GB | RTSL_AS Retail Technology Services Ltd | 1K | — | 3 |
| AS51318GB | STANDARD-CHARTERED-BANK-AS STANDARD CHARTERED BANK | 1K | — | 4 |
| AS201433GB | WSCL WISCOL LIMITED | 1K | — | 1 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 589.8K | 6 |
| AS210096GB | Stemconnect Stem Connect LTD | 1K | — | 1 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS209199GB | Cloud-Unboxed-Limited Cloud Unboxed Limited | 1K | — | 4 |
| AS61281GB | NDT-AS Chess Limited | 1K | — | 1 |
| AS20832GB | FUSE2 Southern Communications Ltd | 1K | — | 1 |
| AS35801GB | RE-SOURCES-AS LION RE: SOURCES UK LIMITED | 1K | — | 3 |
| AS202907GB | ATOMICIT Atomic IT Limited | 1K | 524.3K | 2 |
| AS211298GB | DRIFTNET Driftnet Ltd | 1K | 327.7K | 9 |
| AS43442GB | PROVU ProVu Communications Ltd | 1K | 1 | 2 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |
| AS6759GB | IOTX Pelion IoT Limited | 1K | — | 4 |
| AS207827GB | CSL-IOT CSL (DualCom) Limited | 1K | — | 3 |
| AS205389GB | ZOOM-INTERNET Zoom Internet Ltd | 1K | 65.5K | 2 |
| AS60237GB | theWestBrom WEST BROMWICH BUILDING SOCIETY FOUNDATION | 1K | — | 1 |
| AS199788GB | MPS Motion Picture Solutions Limited | 1K | — | 1 |
| AS34178GB | Qinetiq Qinetiq Limited | 1K | — | 4 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS20596GB | future Future Publishing Ltd | 1K | 458.8K | 4 |
| AS211912GB | WHG-USE2 WHG Hosting Services Ltd | 1K | — | 4 |
| AS62195GB | STANTEC-UK-AS Stantec UK Limited | 1K | 1 | 2 |
| AS201289GB | ESENDEX COMMIFY UK LIMITED | 1K | — | 1 |
| AS207245GB | DSTI-ASN DSTI Holdings Limited | 1K | — | 1 |
| AS206681GB | IVISTA Ivista Limited | 1K | — | 1 |
| AS201903GB | EVORIO-AS Evorio Limited | 1K | — | 1 |
| AS47492GB | CONSIDERIT Consider IT Limited | 1K | — | 4 |
| AS209198GB | AS-ORECAT Offshore Renewable Energy Catapult | 1K | 65.5K | 2 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS44009GB | SLEEK-ASN Rackspace Ltd. | 1K | 65.5K | 2 |
| AS208564GB | bedroq Bedroq Limited | 1K | — | 2 |
| AS206078GB | UltraNetworks UltraNetworks Limited | 1K | — | 4 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | 1K | 524.3K | 2 |
| AS51601GB | IPTP IPTP LTD | 1K | 4.1K | 3 |
| AS199569GB | Cognizant-EU-AS Cognizant Worldwide Limited | 1K | 65.5K | 3 |