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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,127 |
| 256 |
| — |
| 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS50391GB | DIVERGENT DIVERGENT NETWORKS LTD | 256 | 65.6K | 5 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | 256 | 4 | 5 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS5464GB | NETD ZURICH DATACENTER LTD | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS58117GB | TOUCHTEC TouchTec Technology Limited | 256 | — | 1 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS212031GB | BITSolutions-AS BIT Solutions Ltd | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS211188GB | ASBTSLTD Business Teleports and Solutions Limited | 256 | — | 1 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS34900GB | CME-AS-LO2-2 CME Operations Limited | 256 | — | 1 |
| AS210456GB | EastCostHosting EastCoastHost Ltd | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS198353GB | MIMEO-AS Mimeo Limited | 256 | — | 1 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS60758GB | DMC-AS Deluxe UK Holdings Limited | 256 | — | 1 |