Autonomous System
AS13205 British Telecommunications Limited
ISPActiveUnited KingdomRIPE
AS13205 (UNSPECIFIED) is an ISP network operated by British Telecommunications Limited in United Kingdom, registered with RIPE. It has 14 IPv4 prefixes with 20,224 addresses, which makes it the 6,828th largest of 82,283 active autonomous systems by IPv4 space.
IPv4 addresses20,224in 14 prefixes
IPv6 prefixes0none
Size rank#6,828of 82,283 active ASNs
Details
OrganizationBritish Telecommunications Limited
AS nameUNSPECIFIED
Websitebt.com
Country United Kingdom (GB)
Network typeISP
RegistryRIPE
Abuse contactprotect@bt.com
Registered1970-01-01
Last updated2017-11-15
IPv4 prefixes
14 prefixes · 20,224 addresses| Network | Addresses | First – last address |
|---|---|---|
| 217.140.32.0/19 | 8,192 | 217.140.32.0 – 217.140.63.255 |
| 78.109.0.0/20 | 4,096 | 78.109.0.0 – 78.109.15.255 |
| 217.140.0.0/20 | 4,096 | 217.140.0.0 – 217.140.15.255 |
| 217.140.12.0/22 | 1,024 | 217.140.12.0 – 217.140.15.255 |
| 31.11.56.0/23 | 512 | 31.11.56.0 – 31.11.57.255 |
| 78.109.0.0/24 | 256 | 78.109.0.0 – 78.109.0.255 |
| 78.109.5.0/24 | 256 | 78.109.5.0 – 78.109.5.255 |
| 78.109.6.0/24 | 256 | 78.109.6.0 – 78.109.6.255 |
| 78.109.7.0/24 | 256 | 78.109.7.0 – 78.109.7.255 |
| 78.109.9.0/24 | 256 | 78.109.9.0 – 78.109.9.255 |
| 78.109.10.0/24 | 256 | 78.109.10.0 – 78.109.10.255 |
| 78.109.11.0/24 | 256 | 78.109.11.0 – 78.109.11.255 |
| 217.140.12.0/24 | 256 | 217.140.12.0 – 217.140.12.255 |
| 217.140.13.0/24 | 256 | 217.140.13.0 – 217.140.13.255 |
217.140.32.0/19 78.109.0.0/20 217.140.0.0/20 217.140.12.0/22 31.11.56.0/23 78.109.0.0/24 78.109.5.0/24 78.109.6.0/24 78.109.7.0/24 78.109.9.0/24 78.109.10.0/24 78.109.11.0/24 217.140.12.0/24 217.140.13.0/24
IPv6 prefixes
No IPv6 prefixes.
Query AS13205 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS13205&key=YOUR_API_KEY"Any address in its prefixes resolves to AS13205, with or without a key:
curl "https://api.ipapi.is/?q=217.140.32.1"Other networks of British Telecommunications Limited
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