🇬🇧 United Kingdom
Registry and organization country assignments can differ from the physical location of an IP. Snapshot: 2026-10-04.
138,855,232
Delegated IPv4 address slots
3,410
Registered ASNs
240
Hosting ASNs
5,995
Known VPN exit prefixes
Country reference
- ISO code
- GB
- Continent
- Europe
- Capital
- London
- Currency
- GBP
- Calling code
- 44
- EU member
- No
- Delegated IPv6 address slots
- 1,677,032,759,167,902,828,595,542,082,191,360
Registry allocations
Allocated and assigned RIR prefixes; address slots are summed across records and may overlap.
| Registry | Prefixes | IPv4 slots | IPv6 slots |
|---|---|---|---|
| APNIC | 55 | 24,320 | 871,520,667,989,284,245,191,555,809,280 |
| ARIN | 44 | 89,344 | 89,138,936,383,465,067,567,785,181,184 |
| RIPE_NCC | 11,224 | 138,741,568 | 1,676,072,099,563,530,079,282,782,741,200,896 |
Major autonomous systems
Showing up to 200 of 3,410 ASNs assigned to this country, ranked by announced IPv4 prefix address slots. Overlapping announcements count separately.
| ASN | Organization | Category | IPv4 slots | IPv6 prefixes |
|---|---|---|---|---|
| AS5089 | Virgin Media Limited | business | 24,077,824 | 3 |
| AS2856 | British Telecommunications Limited | isp | 18,496,256 | 7 |
| AS13285 | TalkTalk Communications Limited | isp | 8,773,632 | 5 |
| AS5607 | Sky UK Limited | business | 8,449,280 | 30 |
| AS786 | Jisc Services Limited | business | 7,388,928 | 7 |
| AS5378 | Vodafone Limited | business | 2,793,216 | 1 |
| AS6871 | British Telecommunications Limited | isp | 2,130,944 | 3 |
| AS8220 | COLT Technology Services Group Limited | business | 1,519,104 | 21 |
| AS206067 | Hutchison 3G UK Limited | business | 1,148,672 | 87 |
| AS212238 | Datacamp Limited | hosting | 1,096,448 | 795 |
| AS8851 | GCI Network Solutions Limited | business | 1,003,008 | 6 |
| AS8426 | Claranet Limited | hosting | 912,384 | 20 |
| AS5413 | Wavenet Limited | hosting | 743,936 | 5 |
| AS5400 | British Telecommunications Limited | isp | 735,232 | 40 |
| AS42689 | Glide Student & Residential Limited | education | 620,288 | 3 |
| AS31655 | Gamma Telecom Holdings Ltd | isp | 614,656 | 3 |
| AS3300 | British Telecommunications Limited | isp | 605,440 | 29 |
| AS30844 | Liquid Telecommunications Ltd | isp | 578,560 | 24 |
| AS13037 | Zen Internet Ltd | business | 536,320 | 1 |
| AS62240 | Clouvider Limited | hosting | 438,016 | 1,144 |
| AS20860 | IOMART CLOUD SERVICES LIMITED | hosting | 423,680 | 18 |
| AS15395 | Rackspace Ltd. | hosting | 403,712 | 1 |
| AS9105 | TalkTalk Communications Limited | isp | 393,216 | 0 |
| AS8468 | Cityfibre Limited | business | 360,448 | 3 |
| AS25180 | Exponential-E Ltd. | business | 294,144 | 3 |
Largest cities by reference population
GeoNames reference data; this is not a count of located IP addresses.
- London · 8,961,989
- Birmingham · 1,157,603
- Glasgow · 626,410
- Manchester · 568,996
- Sheffield · 556,500
- Leeds · 536,280
- Edinburgh · 514,990
- Liverpool · 496,770
- Bristol · 479,024
- Cardiff · 372,089
Hosting counts use ASN organization classifications. VPN counts include distinct exit prefixes with a source-provided country seen within seven days of this snapshot; zero means no known evidence, not absence. Country and city references: GeoNames (CC BY 4.0).