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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 | 4,127 |
| 256 |
| — |
| 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | 16 | 2 |
| AS202306GB | HOSTGLOBALPLUS-AS HOSTGLOBAL.PLUS LTD | 256 | 17 | 3 |
| AS9786GB | XIANDOUCLOUD1-AS-AP - XIANDOUCLOUD INFORMATION TECHNOLOGY LTD | 256 | 1 | 2 |
| AS209540GB | EXPEDIA-DUBLIN Expedia.com Ltd. | 256 | — | 1 |
| AS31632GB | OAG-AS OAG Aviation WorldWide Limited | 256 | — | 1 |
| AS199535GB | com Bet Invest LTD | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS16339GB | VI-UK Virtual Internet (UK) Limited | 256 | — | 1 |
| AS211032GB | ASHALLSON LOBOS NETWORKING LTD | 256 | — | 1 |
| AS205772GB | LARMITGTOP-AS LARMITGTOP LTD | 256 | — | 1 |
| AS211829GB | Zaha ZAHA HADID LIMITED | 256 | — | 1 |
| AS199764GB | EA-RO-BUC Electronic Arts Limited | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS206160GB | AGARIKUCHI-AS Simon Mott | 256 | 1 | 2 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS198063GB | DWIN-AS AWIN LTD | 256 | — | 1 |
| AS41988GB | TAKING-CARE-AS TAKING CARE PERSONAL ALARMS LIMITED | 256 | — | 1 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 256 | 1 | 2 |
| AS49967GB | MTVH THAMES VALLEY HOUSING ASSOCIATION LIMITED | 256 | — | 1 |
| AS42465GB | FORCEPOINT-ANYCAST-AS Forcepoint UK Limited | 256 | — | 1 |
| AS41493GB | CHI-X Cboe Europe Limited | 256 | — | 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS198189GB | STEALTHVM Throttle Limited | 256 | 1 | 2 |
| AS201487GB | nsmnet Nathan Morgan | 256 | — | 1 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS56365GB | CME-AS-LD4-2 CME Operations Limited | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS198353GB | MIMEO-AS Mimeo Limited | 256 | — | 1 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS209931GB | VirAir Virair Limited | 256 | — | 1 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS58226GB | PHUSIONIM Phusion IM Limited | 256 | — | 1 |
| AS199738GB | VATORA VATORA LIMITED | 256 | 65.5K | 2 |
| AS204024GB | GRIFFINBANK Griffin Bank Ltd | 256 | 1 | 2 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS216265GB | ARISTO-NET ARISTO NETWORKS LTD | 256 | 1 | 2 |
| AS209297GB | AS-NICHI-YOROZUYA NICHI YOROZUYA LTD | 256 | 33 | 4 |
| AS206974GB | LALDY Laldy Ltd | 256 | — | 1 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS204089GB | ADML Apollo Duck Media Ltd | 256 | 524.3K | 2 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 849 | 22 |