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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 | 4,120 |
| 5.1K |
| — |
| 14 |
| AS51059GB | BRIGHTBOX-AS Brightbox Systems Ltd | 5.1K | 65.5K | 6 |
| AS59597GB | FOURCOM 4COM TECHNOLOGIES LIMITED | 5.1K | 589.8K | 9 |
| AS31712GB | GIGASTREAM-AS Gigastream Limited | 5.1K | — | 3 |
| AS25585GB | KENCOMP Kencomp Internet Ltd | 5.1K | — | 2 |
| AS29033GB | ECKOH Eckoh UK Limited | 5.1K | 4 | 6 |
| AS211121GB | India Tiger Network Limited | 5.1K | — | 5 |
| AS50746GB | BTL Britannic Technologies Ltd | 5.1K | — | 3 |
| AS39875GB | W3Z Zycomm Electronics Limited | 5.1K | — | 2 |
| AS25335GB | NGS NEXT GLOBAL SERVICES L.P. | 5.1K | — | 11 |
| AS203443GB | INDERTCONNECTION INDERT CONNECTION LP | 5.1K | 524.3K | 10 |
| AS49375GB | AS-NOONEINTERNET No One Internet Ltd | 5.1K | 524.3K | 19 |
| AS59778GB | SYNEXTRA-UK Synextra Limited | 5.1K | — | 11 |
| AS212194GB | Yuusei YUUSEI LTD | 5.1K | 3 | 11 |
| AS215066GB | AQUISS-AS Aquiss Limited | 4.9K | 65.5K | 20 |
| AS48529GB | quantumbeam Quantumbeam Communications Limited | 4.9K | — | 9 |
| AS205098GB | CGUK Cloud Gateway Limited | 4.9K | — | 9 |
| AS196778GB | TFL Transport for London | 4.9K | — | 3 |
| AS29219GB | SAQ-UK-AS SEMTEC LIMITED | 4.9K | — | 7 |
| AS43108GB | GARM-AS GARMTECH LP | 4.9K | — | 6 |
| AS199404GB | WHG-IN WHG Hosting Services Ltd | 4.9K | — | 19 |
| AS60949GB | AS-4XSOLUTIONS 4x Solutions UK LTD | 4.9K | — | 19 |
| AS213169GB | Catixs-Edge Catixs Ltd | 4.9K | — | 10 |
| AS36218GB | WHG-CAN WHG Hosting Services Ltd | 4.9K | — | 9 |
| AS61337GB | ECOM-AS Single Mode Networks Ltd | 4.9K | 1 | 13 |
| AS28846GB | ASCARLTONTV ITV Services Limited | 4.6K | — | 14 |
| AS42009GB | AVR-AS AVR Group Limited | 4.6K | 65.5K | 5 |
| AS39552GB | AHR-AS WBA (IT Services) International Limited | 4.6K | — | 3 |
| AS15753GB | BP-US-2 BP International Ltd | 4.6K | — | 12 |
| AS25022GB | TDMGROUP TDM Group Limited | 4.6K | — | 3 |
| AS12789GB | DMG-Media-Limited DMG Media Limited | 4.6K | — | 16 |
| AS49775GB | LunarDigital Lunar Digital Solutions Limited | 4.6K | 524.3K | 9 |
| AS31445GB | Cloud-AS Fiberax Networking&Cloud Ltd. | 4.6K | 65.5K | 18 |
| AS49823GB | Hastingwood Hastingwood Securities Ltd | 4.6K | — | 3 |
| AS41383GB | wolasn Wolseley UK Limited | 4.6K | — | 8 |
| AS203568GB | airband Airband Community Internet Ltd | 4.6K | 524.3K | 8 |
| AS41477GB | LMAX LMAX Limited | 4.6K | — | 7 |
| AS212171GB | Local-as Local NCC Ltd. | 4.6K | — | 11 |
| AS60981GB | TRIANGLE-AS Triangle Networks Ltd | 4.6K | 655.4K | 7 |
| AS57653GB | CTL-AS Central Technology Ltd | 4.4K | 65.5K | 7 |
| AS203758GB | EUGameHost-LTD EUGAMEHOST LTD | 4.4K | — | 17 |
| AS29400GB | TULLETT-AS TP ICAP GROUP SERVICES LIMITED | 4.4K | — | 14 |
| AS197107GB | BlueChip SERVICE EXPRESS EUROPE LIMITED | 4.4K | — | 17 |
| AS21301GB | UK-NATWEST-AS21301 Natwest Markets PLC | 4.4K | — | 12 |
| AS41231GB | CANONICAL-AS Canonical Group Limited | 4.4K | 11 | 27 |
| AS212913GB | TIMEHOST-AS TIME-HOST LTD | 4.4K | 2 | 19 |
| AS212743GB | ETERNITY-AS ETERNITY INTERNATIONAL LIMITED | 4.4K | 1 | 16 |