Autonomous System
AS25 University of California at Berkeley
EducationActiveUnited StatesARIN
AS25 (UCB) is an education network operated by University of California at Berkeley in United States, registered with ARIN. It has 13 IPv4 prefixes with 206,080 addresses and 2 IPv6 prefixes, which makes it the 1,261st largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses206,080in 13 prefixes
IPv6 prefixes2≈ 7.9 × 10²⁸ addresses
Size rank#1,261of 82,200 active ASNs
Details
OrganizationUniversity of California at Berkeley
AS nameUCB
Websiteberkeley.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactabuse@security.berkeley.edu
Registered1984-08-03
Last updated2023-12-14
IPv4 prefixes
13 prefixes · 206,080 addresses| Network | Addresses | First – last address |
|---|---|---|
| 128.32.0.0/16 | 65,536 | 128.32.0.0 – 128.32.255.255 |
| 136.152.0.0/16 | 65,536 | 136.152.0.0 – 136.152.255.255 |
| 169.229.0.0/16 | 65,536 | 169.229.0.0 – 169.229.255.255 |
| 169.229.176.0/20 | 4,096 | 169.229.176.0 – 169.229.191.255 |
| 169.236.240.0/21 | 2,048 | 169.236.240.0 – 169.236.247.255 |
| 208.68.240.0/22 | 1,024 | 208.68.240.0 – 208.68.243.255 |
| 192.150.186.0/23 | 512 | 192.150.186.0 – 192.150.187.255 |
| 192.154.4.0/23 | 512 | 192.154.4.0 – 192.154.5.255 |
| 67.21.36.0/24 | 256 | 67.21.36.0 – 67.21.36.255 |
| 192.12.234.0/24 | 256 | 192.12.234.0 – 192.12.234.255 |
| 192.35.209.0/24 | 256 | 192.35.209.0 – 192.35.209.255 |
| 192.154.6.0/24 | 256 | 192.154.6.0 – 192.154.6.255 |
| 209.129.246.0/24 | 256 | 209.129.246.0 – 209.129.246.255 |
128.32.0.0/16 136.152.0.0/16 169.229.0.0/16 169.229.176.0/20 169.236.240.0/21 208.68.240.0/22 192.150.186.0/23 192.154.4.0/23 67.21.36.0/24 192.12.234.0/24 192.35.209.0/24 192.154.6.0/24 209.129.246.0/24
IPv6 prefixes
2 prefixes- 2607:f140::/32
- 2607:f140:e000::/48
2607:f140::/32 2607:f140:e000::/48
Query AS25 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=AS25&key=YOUR_API_KEY"Any address in its prefixes resolves to AS25, with or without a key:
curl "https://api.ipapi.is/?q=128.32.0.1"Largest networks in United States
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