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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 299 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.5M | 555 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET Jisc Services Limited | 7.2M | 222 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.9M | 80 |
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS12789GB | DMG-Media-Limited DMG Media Limited | 4.6K | — | 16 |
| AS41383GB | wolasn Wolseley UK Limited | 4.6K | — | 10 |
| AS41231GB | CANONICAL-AS Canonical Group Limited | 4.6K | 13 | 30 |
| AS42009GB | AVR-AS AVR Group Limited | 4.6K | 65.5K | 5 |
| AS25022GB | TDMGROUP TDM Group Limited | 4.6K | — | 3 |
| AS9084GB | GSI-AS Goldman Sachs International | 4.4K | — | 17 |
| AS198623GB | ISUMO-UK ISUMO Ltd | 4.4K | — | 3 |
| AS209336GB | GBWS GB Wholesale Networks LTD | 4.4K | 1 | 12 |
| AS212913GB | TIMEHOST-AS TIME-HOST LTD | 4.4K | 2 | 19 |
| AS41951GB | GlobecastUK GlobecastUK Ltd | 4.4K | — | 12 |
| AS57653GB | CTL-AS Central Technology Ltd | 4.4K | 65.5K | 7 |
| AS21301GB | UK-NATWEST-AS21301 Natwest Markets PLC | 4.4K | — | 12 |
| AS50910GB | MAINSTREAM-BIRM1-AS Mainstream Digital Ltd | 4.4K | — | 11 |
| AS60542GB | NEXT Next Internet Network Ltd | 4.4K | — | 17 |
| AS208949GB | hbing-as HBING LIMITED | 4.4K | — | 16 |
| AS29400GB | TULLETT-AS TP ICAP GROUP SERVICES LIMITED | 4.4K | — | 14 |
| AS197107GB | BlueChip SERVICE EXPRESS EUROPE LIMITED | 4.4K | — | 17 |
| AS200904GB | FOXCLOUD FOXCLOUD LLP | 4.4K | — | 17 |
| AS34697GB | EMERSON-EMA-AS Emerson Electric UK Limited | 4.4K | — | 2 |
| AS60297GB | CG-UK Capgemini UK plc | 4.1K | 512 | 14 |
| AS59659GB | SECURUS Securus Communications Ltd. | 4.1K | 524.3K | 4 |
| AS35825GB | GUARDIAN-AS Guardian News and Media Limited | 4.1K | — | 9 |
| AS199058GB | SERVAONE SERVA ONE LTD | 4.1K | — | 16 |
| AS20976GB | HOTLINKS-AS Domainmaster LTD | 4.1K | — | 1 |
| AS214271GB | QTNETWORK ICONIC PROTECH LTD | 4.1K | — | 16 |
| AS47998GB | OSCARMUSIC Oscar Music & Media Ltd. | 4.1K | 65.5K | 2 |
| AS28886GB | RETN-LV RETN Limited | 4.1K | 65.5K | 2 |
| AS47351GB | REDTECH Red Technology Solutions Limited | 4.1K | — | 4 |
| AS8789GB | NOV-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 4.1K | — | 1 |
| AS56718GB | INTOUCH-BROADBAND Redshelf Ltd | 4.1K | 196.6K | 14 |
| AS16376GB | SYSGROUP-PLC SysGroup plc | 4.1K | — | 4 |
| AS202575GB | UNI-HULL University of Hull | 4.1K | — | 1 |
| AS44791GB | KINLY-AS KINLY UK LTD | 4.1K | — | 2 |
| AS204239GB | UK-Abzorb Abzorb Group Ltd | 4.1K | — | 4 |
| AS39060GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 4.1K | — | 3 |
| AS200660GB | QONZER QONZER LTD | 4.1K | — | 16 |
| AS15770GB | DERWENTSIDE Durham County Council | 4.1K | — | 1 |
| AS25343GB | COVENTRY-AS Coventry University | 4.1K | — | 1 |
| AS201126GB | CDW-UK-AS CDW Ltd | 4.1K | — | 12 |
| AS203231GB | V4VoIP Vanquish Global Trading Ltd | 4.1K | — | 1 |
| AS215000GB | CountryConnect Country Connect Ltd | 4.1K | 524.3K | 12 |
| AS198037GB | SPACECORE SPACECORE SOLUTION LTD | 4.1K | 12.3K | 18 |
| AS59565GB | CRONOS-AS Cronos Internet Ltd | 4.1K | 65.5K | 4 |
| AS39630GB | Asptech Asptech IT Solutions Ltd | 4.1K | — | 9 |
| AS39620GB | ngbaileyit-uk NG BAILEY IT SERVICES LIMITED | 4.1K | — | 1 |
| AS15572GB | Cybertrust Verizon UK Limited | 4.1K | 1 | 16 |
| AS210814GB | VUNIFY VUNIFY LTD | 4.1K | 5 | 21 |
| AS35200GB | TransitX-Ltd TransitX Ltd | 4.1K | 65.5K | 17 |
| AS39202GB | GCAP-AS Global Radio Limited | 4.1K | 65.5K | 2 |
| AS57022GB | DATAVITA-AS HFD DATAVITA LIMITED | 4.1K | 1 | 13 |