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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 |
| 5.1K |
| 65.5K |
| 6 |
| AS199448GB | NTE-AS Babble Cloud Holdings Ltd. | 5.1K | — | 4 |
| AS31712GB | GIGASTREAM-AS Gigastream Limited | 5.1K | — | 3 |
| AS59597GB | FOURCOM 4COM TECHNOLOGIES LIMITED | 5.1K | 589.8K | 9 |
| AS39875GB | W3Z Zycomm Electronics Limited | 5.1K | — | 2 |
| AS49375GB | AS-NOONEINTERNET No One Internet Ltd | 5.1K | 524.3K | 19 |
| AS207916GB | Velocity1UK Velocity1 Limited | 5.1K | — | 5 |
| AS29033GB | ECKOH Eckoh UK Limited | 5.1K | 4 | 6 |
| AS201739GB | METRANET-AS Metranet Communications Ltd. | 5.1K | — | 14 |
| AS50746GB | BTL Britannic Technologies Ltd | 5.1K | — | 3 |
| AS25585GB | KENCOMP Kencomp Internet Ltd | 5.1K | — | 2 |
| AS25335GB | NGS NEXT GLOBAL SERVICES L.P. | 5.1K | — | 11 |
| AS203443GB | INDERTCONNECTION INDERT CONNECTION LP | 5.1K | 524.3K | 10 |
| AS61049GB | EXASCALE Exascale Ltd | 4.9K | 262.4K | 21 |
| AS29219GB | SAQ-UK-AS SEMTEC LIMITED | 4.9K | — | 7 |
| AS199404GB | WHG-IN WHG Hosting Services Ltd | 4.9K | — | 19 |
| AS31445GB | Cloud-AS Fiberax Networking&Cloud Ltd. | 4.9K | 65.5K | 19 |
| AS205098GB | CGUK Cloud Gateway Limited | 4.9K | — | 9 |
| AS43108GB | GARM-AS GARMTECH LP | 4.9K | — | 6 |
| AS213529GB | SCULK-AS Sculk Ltd. | 4.9K | 18 | 21 |
| AS60949GB | AS-4XSOLUTIONS 4x Solutions UK LTD | 4.9K | — | 19 |
| AS36218GB | WHG-CAN WHG Hosting Services Ltd | 4.9K | — | 9 |
| AS196778GB | TFL Transport for London | 4.9K | — | 3 |
| AS213734GB | ZERODESK-LTD ZERODESK LTD | 4.9K | 3.3M | 27 |
| AS61337GB | ECOM-AS Single Mode Networks Ltd | 4.9K | 1 | 13 |
| AS215066GB | AQUISS-AS Aquiss Limited | 4.9K | 65.5K | 20 |
| AS213169GB | Catixs-Edge Catixs Ltd | 4.9K | — | 10 |
| AS49775GB | LunarDigital Lunar Digital Solutions Limited | 4.9K | 524.3K | 8 |
| AS41477GB | LMAX LMAX Limited | 4.6K | — | 7 |
| AS28846GB | ASCARLTONTV ITV Services Limited | 4.6K | — | 14 |
| AS60981GB | TRIANGLE-AS Triangle Networks Ltd | 4.6K | 655.4K | 7 |
| AS203568GB | airband Airband Community Internet Ltd | 4.6K | 524.3K | 8 |
| AS41383GB | wolasn Wolseley UK Limited | 4.6K | — | 8 |
| AS201988GB | VPSPay-ASN VPSPay Networks LTD | 4.6K | — | 16 |
| AS25022GB | TDMGROUP TDM Group Limited | 4.6K | — | 3 |
| AS39552GB | AHR-AS WBA (IT Services) International Limited | 4.6K | — | 3 |
| AS42009GB | AVR-AS AVR Group Limited | 4.6K | 65.5K | 5 |
| AS12789GB | DMG-Media-Limited DMG Media Limited | 4.6K | — | 16 |
| AS15753GB | BP-US-2 BP International Ltd | 4.6K | — | 12 |
| AS212743GB | ETERNITY-AS ETERNITY INTERNATIONAL LIMITED | 4.4K | 257 | 17 |
| AS34697GB | EMERSON-EMA-AS Emerson Electric UK Limited | 4.4K | — | 2 |
| AS49485GB | HAHOSTING High Availability Hosting Limited | 4.4K | 65.5K | 18 |
| AS200904GB | FOXCLOUD FOXCLOUD LLP | 4.4K | — | 17 |
| AS199058GB | SERVAONE SERVA ONE LTD | 4.4K | — | 17 |
| AS198623GB | ISUMO-UK ISUMO Ltd | 4.4K | — | 3 |
| AS197107GB | BlueChip SERVICE EXPRESS EUROPE LIMITED | 4.4K | — | 17 |
| AS212913GB | TIMEHOST-AS TIME-HOST LTD | 4.4K | 2 | 19 |