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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 |
| 256 |
| — |
| 1 |
| AS218644GB | DOGLE-AS Dylan Joseph Ogle | 256 | 1 | 2 |
| AS218388GB | LODESTAR LODESTAR NETWORKS LTD | 256 | 1 | 2 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS198628GB | FIDESSA-AS FIDESSA TRADING UK LIMITED | 256 | — | 1 |
| AS218754GB | THORN-HOSTING Thorn Hosting LTD | 256 | 1 | 2 |
| AS62112GB | XCONNECT-NL XConnect Services Limited | 256 | — | 1 |
| AS60933GB | QUALCO-IL QUALCOMM (UK) LIMITED | 256 | — | 1 |
| AS16339GB | VI-UK Virtual Internet (UK) Limited | 256 | — | 1 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS218713GB | NETCENSUS-AS NETCENSUS LTD | 256 | 2 | 3 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | — | 1 |
| AS211032GB | ASHALLSON LOBOS NETWORKING LTD | 256 | — | 1 |
| AS218584GB | Sipher Sipher Ltd | 256 | — | 1 |
| AS47744GB | ANNECTO-AS ANNECTO TELECOM LIMITED | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS219227GB | VANISH-CLOUD-AS VANISH CLOUD LTD | 256 | — | 1 |
| AS200280GB | CameronSharp Cameron Sharp | 256 | 1 | 2 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS52024GB | kwik-fit-gb KWIK-FIT (GB) Limited | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS59617GB | ANDYD Andy Davidson | 256 | 1 | 2 |
| AS39617GB | CONSULTANCY-ASN Chris Burton | 256 | 1 | 2 |
| AS201529GB | ORCHID-CELLMARK-ABINGDON Orchid Cellmark Ltd | 256 | 1 | 2 |
| AS201422GB | MEDIEVALSNAIL-ASN Medieval Snail Limited | 256 | 1 | 2 |
| AS42465GB | FORCEPOINT-ANYCAST-AS Forcepoint UK Limited | 256 | — | 1 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | 1 | 2 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS219040GB | BREEZENODES Breezenodes Ltd | 256 | 3 | 4 |
| AS207754GB | COLDERWOOD James Colderwood | 256 | 65.5K | 3 |
| AS9014GB | CEFAS Centre for Environment Fisheries and Aquaculture Science (CEFAS) | 256 | — | 1 |
| AS212068GB | ALIOTH Alioth Systems Limited | 256 | 18 | 4 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS204045GB | COMPASSPLUSGB-AS Compass Plus (Great Britain) Limited | 256 | — | 1 |
| AS204387GB | EG-AS Evolution Gaming LTD | 256 | — | 1 |
| AS57586GB | VENSERVE-AS TOURLINK ORGANIZATION LLP | 256 | — | 1 |
| AS212733GB | Netquirk Netquirk Limited | 256 | — | 1 |
| AS210192GB | TOPLINESYSTEMS Topline Systems Ltd | 256 | — | 1 |
| AS218541GB | MAILLAND Ventrya LTD | 256 | — | 1 |
| AS211142GB | as_gaussmanltd CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 869 | 27 |