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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 |
| 4.1K |
| 5 |
| 21 |
| AS39202GB | GCAP-AS Global Radio Limited | 4.1K | 65.5K | 2 |
| AS25343GB | COVENTRY-AS Coventry University Computing Services | 4.1K | — | 1 |
| AS205039GB | BeaconBroadband Beacon Broadband LTD | 4.1K | — | 16 |
| AS51905GB | CWCS-VM Compuweb Communications Services Limited | 4.1K | — | 9 |
| AS39884GB | VOIPFONE-AS iNet Telecoms Ltd | 4.1K | — | 5 |
| AS39620GB | ngbaileyit-uk NG BAILEY IT SERVICES LIMITED | 4.1K | — | 1 |
| AS47351GB | REDTECH Red Technology Solutions Limited | 4.1K | — | 4 |
| AS47998GB | OSCARMUSIC Oscar Music & Media Ltd. | 4.1K | 65.5K | 2 |
| AS196881GB | LIBERTY-AS Liberty-izone Ltd | 4.1K | 524.3K | 6 |
| AS203231GB | V4VoIP Vanquish Global Trading Ltd | 4.1K | — | 1 |
| AS212913GB | TIMEHOST-AS TIME-HOST LTD | 4.4K | 2 | 19 |
| AS41951GB | GlobecastUK GlobecastUK Ltd | 4.4K | — | 12 |
| AS9084GB | GSI-AS Goldman Sachs International | 4.4K | — | 17 |
| AS49485GB | HAHOSTING High Availability Hosting Limited | 4.4K | 65.5K | 18 |
| AS34697GB | EMERSON-EMA-AS Emerson Electric UK Limited | 4.4K | — | 2 |
| AS198623GB | ISUMO-UK ISUMO Ltd | 4.4K | — | 3 |
| AS200904GB | FOXCLOUD FOXCLOUD LLP | 4.4K | — | 17 |
| AS41231GB | CANONICAL-AS Canonical Group Limited | 4.4K | 11 | 27 |
| AS199058GB | SERVAONE SERVA ONE LTD | 4.4K | — | 17 |
| AS50910GB | MAINSTREAM-BIRM1-AS Mainstream Digital Ltd | 4.4K | — | 11 |
| AS207567GB | INTEZIONET-AS Intezio Worldwide Limited | 4.4K | 263 | 25 |
| AS197107GB | BlueChip SERVICE EXPRESS EUROPE LIMITED | 4.4K | — | 17 |
| AS42009GB | AVR-AS AVR Group Limited | 4.6K | 65.5K | 5 |
| AS203568GB | airband Airband Community Internet Ltd | 4.6K | 524.3K | 8 |
| AS28846GB | ASCARLTONTV ITV Services Limited | 4.6K | — | 14 |
| AS15753GB | BP-US-2 BP International Ltd | 4.6K | — | 12 |
| AS39552GB | AHR-AS WBA (IT Services) International Limited | 4.6K | — | 3 |
| AS60981GB | TRIANGLE-AS Triangle Networks Ltd | 4.6K | 655.4K | 7 |
| AS201988GB | VPSPay-ASN VPSPay Networks LTD | 4.6K | — | 16 |
| AS12789GB | DMG-Media-Limited DMG Media Limited | 4.6K | — | 16 |
| AS203048GB | ORG-BNL44-RIPE BritNeighbour Net Ltd | 4.6K | — | 18 |
| AS25022GB | TDMGROUP TDM Group Limited | 4.6K | — | 3 |
| AS41383GB | wolasn Wolseley UK Limited | 4.6K | — | 8 |
| AS41477GB | LMAX LMAX Limited | 4.6K | — | 7 |
| AS49823GB | Hastingwood Hastingwood Securities Ltd | 4.6K | — | 3 |
| AS36218GB | WHG-CAN WHG Hosting Services Ltd | 4.9K | — | 9 |
| AS29219GB | SAQ-UK-AS SEMTEC LIMITED | 4.9K | — | 7 |
| AS31445GB | Cloud-AS Fiberax Networking&Cloud Ltd. | 4.9K | 65.5K | 19 |
| AS215066GB | AQUISS-AS Aquiss Limited | 4.9K | 65.5K | 20 |
| AS61337GB | ECOM-AS Single Mode Networks Ltd | 4.9K | 1 | 13 |
| AS196778GB | TFL Transport for London | 4.9K | — | 3 |
| AS199404GB | WHG-IN WHG Hosting Services Ltd | 4.9K | — | 19 |
| AS212706GB | LIVI-HOSTING-AS LIVI HOSTING LTD | 4.9K | 65.5K | 20 |
| AS61049GB | EXASCALE Exascale Ltd | 4.9K | 262.4K | 21 |
| AS49775GB | LunarDigital Lunar Digital Solutions Limited | 4.9K | 524.3K | 8 |
| AS48529GB | quantumbeam Quantumbeam Communications Limited | 4.9K | — | 9 |