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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 |
| TRANQUILA-HOST-AS Tranquila-Host ltd. |
| 256 |
| — |
| 1 |
| AS214188GB | VoltHosting VoltHosting Ltd | 256 | 256 | 2 |
| AS209324GB | BG-SOF Genius Sports UK Limited | 256 | — | 1 |
| AS218666GB | CIVO-SANTACLARA Civo LTD | 256 | — | 1 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS211371GB | TELET Telet Research (N.I) Limited | 256 | — | 1 |
| AS200498GB | PWP-ASN Perella Weinberg Partners UK LLP | 256 | — | 1 |
| AS57672GB | DJA-ASN Daniel James Austin | 256 | 1 | 2 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS211829GB | Zaha ZHA ARCHITECTS LIMITED | 256 | — | 1 |
| AS218543GB | EasyIX EasyIX Networks Limited | 256 | 1 | 2 |
| AS218974GB | UFO-TECHNOLOGIES-LIMITED UFO TECHNOLOGIES LIMITED | 256 | — | 1 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 256 | — | 1 |
| AS218462GB | NOTBADHOSTING NOTBAD HOSTING LTD | 256 | — | 1 |
| AS6540GB | SAMUEL-COSGROVE Samuel Cosgrove | 256 | — | 1 |
| AS209997GB | securitas-uk-as-sms SECURITAS TECHNOLOGY LIMITED | 256 | — | 1 |
| AS216039GB | AntiDDoS-pw EdgeSec Technologies Limited | 256 | 129 | 4 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS42875GB | NCP-AS National Car Parks Limited | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS29200GB | ESEYE Eseye Ltd | 256 | 524.3K | 2 |
| AS218388GB | LODESTAR LODESTAR NETWORKS LTD | 256 | 1 | 2 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |
| AS202275GB | GTSUK-AS Gaming Technology Solutions Ltd. | 256 | 1 | 2 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS214064GB | Kevin-Titmarsh Kevin Titmarsh | 256 | 1 | 2 |
| AS218344GB | AFX-2600 Oliver Ide | 256 | — | 1 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS206392GB | HACKWORTH_UK Hackworth Ltd | 256 | 96 | 5 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS47367GB | TORBAY-AS Torbay Economic Development Company Limited | 256 | — | 1 |
| AS204220GB | STARLONDON-AS Star Europe Limited | 256 | — | 1 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS60758GB | DMC-AS Deluxe UK Holdings Limited | 256 | — | 1 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS207846GB | Lauren-Kelly Lauren Renee Kelly | 256 | 1 | 2 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS39461GB | BE-AS EDF ENERGY NUCLEAR GENERATION LIMITED | 256 | — | 1 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |