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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| 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 |
| 1K |
| — |
| 1 |
| AS49440GB | plustel PLUSTEL LIMITED | 1K | 65.5K | 2 |
| AS211298GB | DRIFTNET Driftnet Ltd | 1K | 327.7K | 9 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS207543GB | DUG-APIC-AUS DOWNUNDER GEOSOLUTIONS (LONDON) PTY LIMITED | 1K | — | 4 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1K | — | 4 |
| AS12884GB | DRW-Investments-AS DRW Investments (UK) Limited | 1K | — | 4 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS209113GB | PRECEDENCE Precedence Technologies Ltd | 1K | — | 3 |
| AS50489GB | ORIEDGE Radiant Infrastructure 1 Limited | 1K | — | 4 |
| AS62145GB | Bango BANGO.NET Ltd | 1K | — | 4 |
| AS204440GB | farmuk STREAMLAND MEDIA UK LIMITED | 1K | — | 4 |
| AS213867GB | TENERITY-AS TENERITY LIMITED | 1K | — | 4 |
| AS34523GB | EMAILSYSTEMS Webroot Services Ltd | 1K | — | 4 |
| AS200147GB | ASHTL Hosting Techniques Limited | 1K | — | 1 |
| AS25030GB | NFU-AS National Farmers Union Mutual Insurance Society Ltd | 1K | — | 3 |
| AS43878GB | EUROPE-CONNECTED Clouvider Limited | 1K | — | 4 |
| AS197223GB | WEDROPCODE-AS WEDROPCODE LTD | 1K | — | 4 |
| AS206681GB | IVISTA Ivista Limited | 1K | 524.3K | 2 |
| AS204414GB | OXAM The OxFORD Asset Management Company Limited | 1K | — | 1 |
| AS60593GB | NR-DC-UK-AS Network Rail Infrastructure Limited | 1K | — | 3 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 1K | — | 3 |
| AS199946GB | Ctalk Ctalk Limited | 1K | — | 4 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS202363GB | uk-rjobrien R.J. OBrien Limited | 1K | — | 1 |
| AS203614GB | NEXTTRANSLATE-AS NEXTTRANSLATE LTD | 1K | — | 4 |
| AS202241GB | BDC-London Business Design Centre Ltd | 1K | — | 1 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS207841GB | INFERNO Inferno Communications Ltd | 1K | 65.8K | 8 |
| AS44052GB | PRESSCOMPUTER-ASN ICONIC MEDIA SYSTEMS LIMITED | 1K | — | 3 |
| AS51545GB | ZSAH zsah Limited | 1K | — | 4 |
| AS205804GB | DELTAV Delta V Technologies Limited | 1K | 65.5K | 10 |
| AS201433GB | WSCL WISCOL LIMITED | 1K | — | 1 |
| AS208307GB | secondmind SECONDMIND LIMITED | 1K | — | 1 |
| AS205106GB | PEASOUP Pea Soup Hosting Limited | 1K | — | 3 |
| AS208524GB | VITS-Hosting-Services VITS LIMITED | 1K | — | 1 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS131222GB | UK-ALPHA GamerDating Ltd | 1K | — | 4 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS199462GB | NETISP-UK-AS NETISP LTD | 1K | 655.4K | 8 |
| AS200052GB | FERAL Feral.io Ltd | 1K | — | 1 |
| AS212217GB | bbonline BB-Online UK Ltd | 1K | 1 | 5 |
| AS205372GB | evrocomuk Evrocom.uk Limited trading as Fiber Zone | 1K | — | 1 |
| AS207072GB | NIGSUN Nigsun Limited | 1K | 262.1K | 2 |
| AS206289GB | sabis TSB BANKING GROUP LIMITED | 1K | — | 4 |