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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 512 |
| — |
| 2 |
| AS212035GB | Babcock_International Babcock Corporate Services Ltd | 512 | — | 2 |
| AS39150GB | HOSTING-TELECOM-AS HOSTING TELECOM LTD | 512 | 327.7K | 7 |
| AS3252GB | FBRX-AS Fiberax Networking&Cloud Ltd. | 512 | — | 2 |
| AS207173GB | uk_northrop Northrop Grumman UK Limited | 512 | — | 2 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS203011GB | osgcloud OSG CLOUD LIMITED | 512 | — | 2 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |
| AS215742GB | Duplia Duplia Ltd | 512 | 65.5K | 3 |
| AS51762GB | BDC-ADV-UK Adversor LLP | 512 | — | 2 |
| AS31659GB | Below-Zero Below Zero Hosting Ltd. | 512 | — | 2 |
| AS49958GB | EVO-AS Evolution Gaming LTD | 512 | — | 2 |
| AS49868GB | ANITE-TRAVEL-SYSTEMS ANITE TRAVEL Ltd | 512 | — | 1 |
| AS210924GB | SSDNetworks SSD Networks Limited | 512 | 524.3K | 3 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 512 | 1 | 3 |
| AS209413GB | DEDIK-CH DEDIK SERVICES LIMITED | 512 | — | 2 |
| AS35559GB | SOMEADDRESS Someaddress Networks Ltd | 512 | 2 | 2 |
| AS203728GB | AS_BAHU BAHU LTD | 512 | 1 | 3 |
| AS202297GB | SKYLON Skylon Solutions Limited | 512 | 65.5K | 7 |
| AS212551GB | UK_FTCLOUD Future Technology Group Ltd | 512 | 1M | 4 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS211189GB | ThermoFisher_EU Thermo Electron Ltd | 512 | — | 1 |
| AS28715GB | BrassHornComms Brass Horn Communications | 512 | 8.2K | 4 |
| AS6540GB | SAMUEL-COSGROVE Samuel Cosgrove | 512 | — | 2 |
| AS213534GB | GardnersBooks Gardners Books Ltd | 512 | — | 2 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS205479GB | LGB-AS Luke Eiji Granger-Brown | 512 | 131.1K | 9 |
| AS25050GB | BACS-AS VOCALINK LTD | 512 | — | 1 |
| AS215675GB | perceptiontvcdn Perception TVCDN Ltd | 512 | — | 2 |
| AS201497GB | express-as STAT EXPRESS SERVICES LTD | 512 | — | 1 |
| AS60688GB | CSPCORE CSP Partnership | 512 | — | 1 |
| AS51087GB | BLING-AS Bling Network Ltd | 512 | 1.1K | 23 |
| AS61978GB | IRIDIS York UK Hosting Ltd | 512 | 1 | 2 |
| AS214309GB | AURORIX Aurorix Gaming Solutions Limited | 512 | 32 | 4 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS199794GB | EMO-AS EMOCLOUD LTD | 256 | 272 | 3 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS50888GB | MINOTAUR-ASN Minotaur I.T. Limited | 256 | — | 1 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 256 | 1 | 2 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |