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 16 IPv4 prefixes with 199,936 addresses, which makes it the 1,299th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses199,936in 16 prefixes
IPv6 prefixes0none
Size rank#1,299of 82,200 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
16 prefixes · 199,936 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 |
| 64.54.195.0/24 | 256 | 64.54.195.0 – 64.54.195.255 |
| 64.54.196.0/24 | 256 | 64.54.196.0 – 64.54.196.255 |
| 64.54.202.0/24 | 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 64.54.195.0/24 64.54.196.0/24 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
AS749 United States Department of Defense (DoD)227,464,192 IPv4 addressesAS16509 Amazon.com, Inc.218,038,784 IPv4 addressesAS7018 AT&T Enterprises, LLC117,262,080 IPv4 addressesAS8075 Microsoft Corporation81,463,040 IPv4 addressesAS721 United States Department of Defense (DoD)73,070,080 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,336,896 IPv4 addresses