The IP API The IP API
// ASN

AS4

ISI-AS - University of Southern California, US

Detailed information about the Autonomous System. Need another one? Look up a different ASN.

ASN
AS4
Organization
University of Southern California
Description
ISI-AS - University of Southern California, US
Country
US
State / Region
CA
City
Marina del Rey
Address
Information Sciences Institute
Registry (RIR)
ARIN
Created
2023-09-10
Updated
2023-09-21
IPv4 Prefixes
41
IPv6 Prefixes
5

IPv4 Prefixes

41 total · showing first 10
128.9.0.0/20
128.9.112.0/20
128.9.113.0/24
128.9.117.0/24
128.9.122.0/24
128.9.123.0/24
128.9.127.0/24
128.9.128.0/20
128.9.144.0/20
128.9.16.0/24

IPv6 Prefixes

5 total
2001:1878:401::/48
2001:1878:402::/48
2001:1878:403::/48
2001:1878:404::/48
2001:500:202::/48

What is AS4?

AS4 is an Autonomous System Number (ASN) assigned to University of Southern California. 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.