United Kingdom

IP address space, AS numbers and the largest networks registered in United Kingdom, based on the delegation records of the regional internet registries.

IPv4 addresses

138.7M

9,106 blocks

IPv6 allocations

2,052

AS numbers

3,143

Routed AS numbers

2,237

Largest networks in United Kingdom

By announced prefixes

AS	Name	IPv4 prefixes	IPv6 prefixes
AS212238	CDNEXT Datacamp Limited	3,566	672
AS62240	Clouvider Clouvider Limited	1,367	1,117
AS2856	BT-UK-AS British Telecommunications Limited	534	7
AS60068	CDN77 Datacamp Limited	415	79
AS21433	AccentureFSSC Accenture UK Limited	324	97
AS58065	PacketExchange Orion Network Limited	397	6
AS206067	H3GUK Hutchison 3G UK Limited	288	81
AS42689	Glide Glide Student & Residential Limited	357	3
AS42831	UKSERVERS-AS UK Dedicated Servers Limited	313	9
AS41095	IPTP IPTP LTD	93	227
AS214238	iwihost HOST TELECOM LTD	316	0
AS30844	LIQUID-AS Liquid Telecommunications Ltd	290	15
AS5089	NTL Virgin Media Limited	297	3
AS25369	BANDWIDTH-AS Hydra Communications Ltd	276	18
AS214143	skydigital-telecom SKYDIGITAL TELECOM LTD	281	0
AS215540	GCS-AS GLOBAL CONNECTIVITY SOLUTIONS LLP	237	37
AS202831	PACKETLOSS Packet Loss LTD	7	262
AS3223	VOXILITY Voxility LLP	238	28
AS58285	ASSIXOP Sixnet Operation Ltd	0	256
AS16247	M247-UK Convergence Group (Wireless) Networks Limited	227	9
AS20860	IOMART-AS IOMART CLOUD SERVICES LIMITED	208	18
AS8851	EDGE GCI Network Solutions Limited	218	6
AS786	JANET Jisc Services Limited	216	7
AS41564	AS41564 Orion Network Limited	196	7
AS44444	Forcepoint-Cloud-AS Forcepoint UK Limited	198	2
AS205489	CODEASSET CODE ASSET LTD	197	0
AS214432	ZLIDC Zhilian Technology CO., LTD.	185	6
AS61112	AkileCloud AKILE LTD	150	32
AS8220	COLT COLT Technology Services Group Limited	155	19
AS15404	COLT Technology Services Group Limited	149	9

Delegations by registry: RIPE 11,059, APNIC 55, ARIN 44. Updated 2026-10-04.