// ASN
AS21589
CSJ-INTERNET - City of San Jose, US
Detailed information about the Autonomous System. Need another one? Look up a different ASN.
- ASN
- AS21589
- Organization
- City of San Jose
- Description
- CSJ-INTERNET - City of San Jose, US
- Country
- US
- State / Region
- CA
- City
- San Jose
- Address
- 200 E. Santa Clara St.
- Registry (RIR)
- ARIN
- Created
- 2007-03-21
- Updated
- 2019-05-21
- IPv4 Prefixes
- 25
- IPv6 Prefixes
- 1
IPv4 Prefixes
25 total · showing first 10156.39.0.0/24 156.39.1.0/24 156.39.10.0/24 156.39.11.0/24 156.39.12.0/24 156.39.125.0/24 156.39.127.0/24 156.39.13.0/24 156.39.131.0/24 156.39.136.0/21
IPv6 Prefixes
1 total2001:470:f0::/48
What is AS21589?
AS21589 is an Autonomous System Number (ASN) assigned to City of San Jose. An ASN identifies a network or group of IP prefixes operated under a common routing policy in the BGP protocol.
Looking for more ASN data?
Use our ASN Lookup Tool for real-time WHOIS queries, or explore our API documentation to integrate ASN data into your applications.