Autonomous System
AS5653 University of California San Francisco
EducationActiveUnited StatesARIN
AS5653 (UCSF) is an education network operated by University of California San Francisco in United States, registered with ARIN. It has 18 IPv4 prefixes with 200,448 addresses, which makes it the 1,292nd largest of 82,558 active autonomous systems by IPv4 space.
IPv4 addresses200,448in 18 prefixes
IPv6 prefixes0none
Size rank#1,292of 82,558 active ASNs
Details
OrganizationUniversity of California San Francisco
AS nameUCSF
Websiteucsf.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactsecurity@ucsf.edu
Registered1995-07-27
Last updated2026-02-26
IPv4 prefixes
18 prefixes · 200,448 addresses| Network | Addresses | First – last address |
|---|---|---|
| 64.54.0.0/16 | 65,536 | 64.54.0.0 – 64.54.255.255 |
| 128.218.0.0/16 | 65,536 | 128.218.0.0 – 128.218.255.255 |
| 169.230.0.0/16 | 65,536 | 169.230.0.0 – 169.230.255.255 |
| 64.54.4.0/24 | 256 | 64.54.4.0 – 64.54.4.255 |
| 64.54.6.0/24 | 256 | 64.54.6.0 – 64.54.6.255 |
| 64.54.17.0/24 | 256 | 64.54.17.0 – 64.54.17.255 |
| 64.54.18.0/24 | 256 | 64.54.18.0 – 64.54.18.255 |
| 64.54.128.0/24 | 256 | 64.54.128.0 – 64.54.128.255 |
| 64.54.149.0/24 | 256 | 64.54.149.0 – 64.54.149.255 |
| 64.54.162.0/24 | 256 | 64.54.162.0 – 64.54.162.255 |
| 64.54.192.0/24 | 256 | 64.54.192.0 – 64.54.192.255 |
| 64.54.193.0/24 | 256 | 64.54.193.0 – 64.54.193.255 |
| 64.54.194.0/24 | 256 | 64.54.194.0 – 64.54.194.255 |
| 64.54.195.0/24 | 256 | 64.54.195.0 – 64.54.195.255 |
| 64.54.196.0/24 | 256 | 64.54.196.0 – 64.54.196.255 |
| 64.54.201.0/24 | 256 | 64.54.201.0 – 64.54.201.255 |
| 64.54.202.0/24 | 256 | 64.54.202.0 – 64.54.202.255 |
| 169.230.239.0/24 | 256 | 169.230.239.0 – 169.230.239.255 |
64.54.0.0/16 128.218.0.0/16 169.230.0.0/16 64.54.4.0/24 64.54.6.0/24 64.54.17.0/24 64.54.18.0/24 64.54.128.0/24 64.54.149.0/24 64.54.162.0/24 64.54.192.0/24 64.54.193.0/24 64.54.194.0/24 64.54.195.0/24 64.54.196.0/24 64.54.201.0/24 64.54.202.0/24 169.230.239.0/24
IPv6 prefixes
No IPv6 prefixes.
Query AS5653 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=AS5653&key=YOUR_API_KEY"Any address in its prefixes resolves to AS5653, with or without a key:
curl "https://api.ipapi.is/?q=64.54.0.1"Largest networks in United States
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