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 12 IPv4 prefixes with 204,032 addresses and 2 IPv6 prefixes, which makes it the 1,264th largest of 82,283 active autonomous systems by IPv4 space.
IPv4 addresses204,032in 12 prefixes
IPv6 prefixes2≈ 7.9 × 10²⁸ addresses
Size rank#1,264of 82,283 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
12 prefixes · 204,032 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 |
| 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 |
128.32.0.0/16 136.152.0.0/16 169.229.0.0/16 169.229.176.0/20 208.68.240.0/22 192.150.186.0/23 192.154.4.0/23 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
AS749 United States Department of Defense (DoD)227,398,912 IPv4 addressesAS16509 Amazon.com, Inc.218,475,264 IPv4 addressesAS7018 AT&T Enterprises, LLC117,261,568 IPv4 addressesAS8075 Microsoft Corporation81,463,040 IPv4 addressesAS721 United States Department of Defense (DoD)72,987,904 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,337,152 IPv4 addresses