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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 4.1K |
| — |
| 2 |
| AS211140GB | TRANSUNION-INTERNATIONAL-UK-LIMITED TRANSUNION INTERNATIONAL UK LIMITED | 4.1K | — | 9 |
| AS47351GB | REDTECH Red Technology Solutions Limited | 4.1K | — | 4 |
| AS35825GB | GUARDIAN-AS Guardian News and Media Limited | 4.1K | — | 9 |
| AS30847GB | LUNS-AS Lancaster University Network Services Limited | 4.1K | 65.5K | 2 |
| AS196881GB | LIBERTY-AS Liberty-izone Ltd | 4.1K | 524.3K | 6 |
| AS47998GB | OSCARMUSIC Oscar Music & Media Ltd. | 4.1K | 65.5K | 2 |
| AS44521GB | Jagex-as Jagex Limited | 4.1K | — | 14 |
| AS214271GB | QTNETWORK ICONIC PROTECH LTD | 4.1K | — | 16 |
| AS205039GB | BeaconBroadband Beacon Broadband LTD | 4.1K | — | 16 |
| AS15572GB | Cybertrust Verizon UK Limited | 4.1K | 1 | 16 |
| AS16376GB | SYSGROUP-PLC SysGroup plc | 4.1K | — | 4 |
| AS200660GB | QONZER QONZER LTD | 4.1K | — | 16 |
| AS39202GB | GCAP-AS Global Radio Limited | 4.1K | 65.5K | 2 |
| AS29120GB | ROWEMAW-AS Mayer Brown International LLP | 4.1K | — | 10 |
| AS200658GB | CoreCloud CoreCloud Systems Ltd | 4.1K | — | 16 |
| AS59565GB | CRONOS-AS Cronos Internet Ltd | 4.1K | 65.5K | 4 |
| AS218862GB | DIGITALZERO-MNT DIGITAL ZERO ONE LTD | 4.1K | — | 16 |
| AS15692GB | RAZORBLUE Razorblue Ltd | 4.1K | 524.3K | 14 |
| AS21218GB | EBCGROUP EBC Group (UK) Ltd | 4.1K | — | 1 |
| AS214438GB | nexgen-ca1 NexGen Cloud Ltd | 4.1K | — | 16 |
| AS39060GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 4.1K | — | 3 |
| AS34697GB | EMERSON-EMA-AS Emerson Electric UK Limited | 4.4K | — | 2 |
| AS218887GB | E-GAUSS E-GAUSS LTD | 4.4K | — | 17 |
| AS215000GB | CountryConnect Country Connect Ltd | 4.4K | 524.3K | 13 |
| AS212913GB | TIMEHOST-AS TIME-HOST LTD | 4.4K | 2 | 19 |
| AS41383GB | wolasn Wolseley UK Limited | 4.4K | — | 9 |
| AS200904GB | FOXCLOUD FOXCLOUD LLP | 4.4K | — | 17 |
| AS198623GB | ISUMO-UK ISUMO Ltd | 4.4K | — | 3 |
| AS197107GB | BlueChip SERVICE EXPRESS EUROPE LIMITED | 4.4K | — | 17 |
| AS57653GB | CTL-AS Central Technology Ltd | 4.4K | 65.5K | 7 |
| 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 |
| AS9084GB | GSI-AS Goldman Sachs International | 4.4K | — | 17 |
| AS41951GB | GlobecastUK GlobecastUK Ltd | 4.4K | — | 12 |
| AS49485GB | HAHOSTING High Availability Hosting Limited | 4.4K | 65.5K | 18 |
| AS203758GB | EUGameHost-LTD EUGAMEHOST LTD | 4.6K | — | 18 |
| AS25022GB | TDMGROUP TDM Group Limited | 4.6K | — | 3 |
| AS203568GB | airband Airband Community Internet Ltd | 4.6K | 524.3K | 8 |
| AS39552GB | AHR-AS WBA (IT Services) International Limited | 4.6K | — | 3 |
| AS41477GB | LMAX LMAX Limited | 4.6K | — | 7 |
| AS12789GB | DMG-Media-Limited DMG Media Limited | 4.6K | — | 16 |
| AS49775GB | LunarDigital Lunar Digital Solutions Limited | 4.6K | 524.3K | 9 |
| AS60981GB | TRIANGLE-AS Triangle Networks Ltd | 4.6K | 655.4K | 7 |
| AS28846GB | ASCARLTONTV ITV Services Limited | 4.6K | — | 14 |
| AS42009GB | AVR-AS AVR Group Limited | 4.6K | 65.5K | 5 |