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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 | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
| 2.8K |
| — |
| 11 |
| AS197574GB | EXPRESSHOST ExpressHost Ltd | 2.8K | — | 11 |
| AS60045GB | KUBE-AS Kube Networks Ltd | 2.8K | — | 7 |
| AS214266GB | ZERODESK-LTD ZERODESK LTD | 2.8K | 11.9M | 38 |
| AS25470GB | Scottish-Southern-Plc-AS Neos Networks Limited | 2.8K | — | 3 |
| AS198690GB | FIBRECAST Fibrecast Ltd. | 2.8K | — | 6 |
| AS212683GB | OLILO-AS Olilo UK & Ireland Ltd | 2.8K | 131.1K | 13 |
| AS52025GB | PARADOXNETWORKS-LIMITED ParadoxNetworks Limited | 2.8K | 580 | 66 |
| AS61414GB | EDGENAP EDGENAP LTD | 2.8K | 1 | 12 |
| AS60610GB | EVEREST-AS Amito Ltd | 2.8K | 1M | 7 |
| AS208949GB | hbing-as HBING LIMITED | 2.8K | — | 10 |
| AS42427GB | MIMECAST-UK Mimecast Services Limited | 2.8K | 2 | 13 |
| AS208035GB | VENOM-ASN Venom IT Ltd | 2.8K | — | 9 |
| AS200660GB | qonzer QONZER LTD | 2.8K | — | 11 |
| AS210457GB | KYONIX Kyonix Networks Limited | 2.8K | 96 | 29 |
| AS211775GB | NGFL-ASN London Grid for Learning Trust | 2.8K | — | 3 |
| AS215000GB | CountryConnect Country Connect Ltd. | 2.8K | — | 8 |
| AS214716GB | WEYRO WEYRO LTD | 2.8K | 3 | 14 |
| AS209336GB | GBWS GB Wholesale Networks LTD | 2.8K | 1 | 9 |
| AS212694GB | AST_INTEGRA Applied Satellite Technology Ltd | 3.1K | — | 2 |
| AS47625GB | UKHOST4U Paul David Hughes | 3.1K | — | 6 |
| AS197651GB | THEHUTGROUPLIMITED FIC SHARECO LIMITED | 3.1K | — | 6 |
| AS48463GB | TRADITIONGROUP Tradition Financial Services Ltd. | 3.1K | — | 8 |
| AS206626GB | PSDGroup-AS Professional Software Design Ltd | 3.1K | — | 8 |
| AS214927GB | PSB-AS PSB HOSTING LTD | 3.1K | 2 | 14 |
| AS49229GB | ANS-GROUP-AS ANS Group Limited | 3.1K | — | 12 |
| AS31256GB | WARWICKSHIRECC Warwickshire County Council | 3.1K | — | 2 |
| AS200675GB | HYDRO66 NORTHERN DATA SERVICES (UK) LIMITED | 3.1K | 524.3K | 4 |
| AS200658GB | CoreCloud CoreCloud Systems Ltd | 3.1K | — | 12 |
| AS52063GB | SYSTEMIP TTP Cloud Group Ltd | 3.1K | 65.5K | 3 |
| AS5459GB | LINX-AS London Internet Exchange Ltd. | 3.1K | 65.5K | 4 |
| AS29575GB | LONDSTOCK-AS London Stock Exchange PLC | 3.1K | — | 7 |
| AS203067GB | Giacom GIACOM (CLOUD) LIMITED | 3.1K | — | 9 |
| AS57907GB | CLOUDCONNX CloudConnX Limited | 3.1K | 524.3K | 3 |
| AS39846GB | ONEGA Onega Ltd | 3.1K | — | 5 |
| AS210099GB | TIGOVA TIGOVA NETWORK LIMITED | 3.1K | — | 12 |
| AS28863GB | Thales-SCS Thales UK Limited | 3.1K | — | 5 |
| AS51707GB | INNOVATION-CENTRE-MEDWAY-ASN Medway Towns Council | 3.1K | — | 3 |
| AS216039GB | AntiDDoS-pw EdgeSec Technologies Limited | 3.1K | 17 | 14 |
| AS43463GB | BST-LT INFOCOM UK LTD | 3.1K | 256 | 10 |
| AS51409GB | SIPSYNERGY sipsynergy Ltd | 3.1K | — | 12 |
| AS39730GB | EIRCOM-UK Eircom (UK) Ltd | 3.1K | 524.3K | 3 |
| AS201855GB | uk-as-raymondjames RAYMOND JAMES INVESTMENT SERVICES LIMITED | 3.1K | — | 7 |
| AS52200GB | M5-AS M5 Limited | 3.1K | — | 3 |
| AS209326GB | CF-001 AMPHORA TRADING LTD | 3.1K | — | 12 |
| AS25462GB | RETN-UA-AS RETN Limited | 3.1K | — | 2 |
| AS200083GB | SUB6 Sub 6 Limited | 3.1K | 65.5K | 3 |