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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 | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS57228GB | AXIANS-UK-AS Axians Networks Limited | 1.8K | — | 7 |
| AS197246GB | BELGRAVIA-AS BELGRAVIA MEDIA LTD | 1.8K | — | 7 |
| AS201715GB | ineedbr Ineedbroadband Ltd | 1.8K | — | 4 |
| AS210893GB | LAYEREDTECH Layered Technologies Limited | 1.8K | 524.3K | 8 |
| AS48866GB | NETCRACKER-EMEA-AS Netcracker Technology EMEA Limited | 1.8K | — | 7 |
| AS210980GB | MANTA-TECH MANTA TECH LTD | 1.8K | — | 7 |
| AS196646GB | Datum Datum Datacentres Limited | 1.8K | — | 7 |
| AS202454GB | PINE-MEDIA Pine Media Ltd | 1.8K | — | 7 |
| AS204562GB | ASJavelin JAVELIN BROADBAND LIMITED | 1.8K | 524.3K | 5 |
| AS42237GB | w1n w1n ltd | 1.8K | 655.4K | 17 |
| AS29474GB | GHOTI-AS Ghoti Limited | 1.8K | — | 4 |
| AS215429GB | Ireland IQVIA SOLUTIONS HQ LTD | 1.8K | — | 3 |
| AS197715GB | Serverbike Serverbike LTD | 1.8K | 2 | 9 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |
| AS198386GB | ONI THRIVE OPERATIONS LIMITED | 1.8K | — | 4 |
| AS48273GB | ESSENSYS ESSENSYS (UK) Ltd. | 1.8K | — | 7 |
| AS207019GB | TNCL Clouvider Limited | 1.8K | — | 7 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS209082GB | SWLINES Swlines Ltd | 1.8K | 1 | 8 |
| AS208507GB | MitsubishiHC-Capital Mitsubishi HC Capital UK PLC | 1.8K | — | 5 |
| AS49911GB | DCNET DCNet Limited | 1.8K | 524.3K | 8 |
| AS48529GB | quantumbeam Quantumbeam Communications Limited | 1.8K | — | 7 |
| AS60103GB | ACCESSPT Accesspoint Technologies Ltd | 1.5K | — | 3 |
| AS60868GB | BRANDWATCH-AS Runtime Collective Limited | 1.5K | 65.5K | 4 |
| AS200636GB | PARAVIRT Paravirt LTD | 1.5K | — | 6 |
| AS41379GB | NTA-AS Nationwide Telephone Assistance Ltd | 1.5K | — | 3 |
| AS210667GB | SMISHCRAFT Adam Goodenough | 1.5K | 19 | 25 |
| AS64435GB | comgw The Communication GATEWAY LTD | 1.5K | 65.5K | 4 |
| AS204415GB | nexgen NexGen Cloud Ltd | 1.5K | — | 5 |
| AS44371GB | PPN Paypoint Network Limited | 1.5K | — | 6 |
| AS203177GB | PINNACA BCS Global Networks Limited | 1.5K | — | 6 |
| AS12761GB | COLT-CORP-IT COLT Technology Services Group Limited | 1.5K | — | 6 |
| AS202147GB | VPSUS VPSUS LTD | 1.5K | 1 | 7 |
| AS42513GB | NATILIK-AS Natilik Ltd | 1.5K | — | 4 |
| AS215047GB | Theonebroadband DSV Communications Limited | 1.5K | 524.3K | 6 |
| AS202792GB | CLOUD-TRANSIT Clouvider Limited | 1.5K | — | 6 |
| AS216405GB | MSUK-ISP Metric Systems UK LTD | 1.5K | 2 | 8 |
| AS199455GB | ARQWIFI Virgin WiFi Ltd | 1.5K | — | 3 |
| AS218914GB | DATAGIONET-AS Datagio Systems Ltd. | 1.5K | 3 | 9 |
| AS50132GB | WRG-AS 3nt solutions LLP | 1.5K | — | 6 |
| AS60228GB | C24-AS Six Degrees Technology Group Limited | 1.5K | 98.3K | 4 |
| AS41355GB | CATALYST2-RDG Team Blue Carrier Limited | 1.5K | 65.5K | 4 |
| AS59445GB | ICC-AS ICC NETWORKS LTD | 1.5K | — | 3 |
| AS58144GB | ASN-TSC THE STREAMING COMPANY.COM LIMITED | 1.5K | — | 3 |
| AS47768GB | INTISTELECOM-AS UK Intis Telecom LTD | 1.5K | 1 | 4 |
| AS35832GB | BGFL Birmingham City Council | 1.5K | — | 5 |
| AS49354GB | SIMETRIC TANGO NETWORKS UK LTD | 1.5K | — | 3 |
| AS205719GB | FORESTSNET FORESTSNET LTD | 1.5K | 2 | 8 |