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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 331 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| — |
| 1 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS48460GB | GREENCO-DR ServerHouse Ltd | 256 | — | 1 |
| AS213546GB | AS_QUICK_BYTES Quick Bytes LTD | 256 | — | 1 |
| AS200581GB | TFWFIBRE-ASN TfW Fibre Ltd | 256 | 524.3K | 2 |
| AS43236GB | BLUECREST-AS Bluecrest Capital Management LLP | 256 | — | 1 |
| AS209215GB | Moe-Network-LTD Moe Network Ltd | 256 | 16 | 2 |
| AS49793GB | IAIN-MCWILLIAMS-AS LMP Technical Services Ltd | 256 | 1 | 2 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS203001GB | GateX GateX LIMITED | 256 | 1 | 2 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | — | 1 |
| AS58062GB | StarNetwork w1n ltd | 256 | — | 1 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS42044GB | CENTRALNIC CentralNic Ltd | 256 | 1 | 2 |
| AS56365GB | CME-AS-LD4-2 CME Operations Limited | 256 | — | 1 |
| AS212446GB | caciltd CACI Ltd | 256 | — | 1 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS210192GB | TOPLINESYSTEMS Topline Systems Ltd | 256 | — | 1 |
| AS214637GB | Online-Projects-AS Online Projects LTD | 256 | — | 1 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS49967GB | MTVH THAMES VALLEY HOUSING ASSOCIATION LIMITED | 256 | — | 1 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS204208GB | Peravix Peravix Group LTD | 256 | 272 | 3 |
| AS48987GB | JYANGNET Jiaxun Yang | 256 | 1 | 2 |
| AS12613GB | FIREBRICK-AS Firebrick Limited | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS207552GB | cambridge-consultants Cambridge Consultants Limited | 256 | — | 1 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS215322GB | connectcov UK Dedicated Servers Limited | 256 | 65.5K | 2 |
| AS211374GB | McLarenApplied Motion Applied Limited | 256 | — | 1 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS209710GB | LUMINE-AS SNRD NETWORKS LIMITED | 256 | 359 | 12 |
| AS201357GB | DPNET-FAST DPNET FAST RELIABLE HOSTING VPS CLOUD SOLUTIONS LTD | 256 | — | 1 |
| AS214634GB | AS-BRESSENDEN Bressenden Associates Ltd | 256 | 1 | 2 |
| AS198337GB | DATAART-LVIV DataArt Technologies UK Ltd | 256 | — | 1 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS210938GB | whitbread Whitbread Group PLC | 256 | — | 1 |
| AS200950GB | CalibourNetwork Calibour Limited | 256 | 817 | 8 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |