AS4
AS4
ARIN
Education
Data retrieved at
This AS-only summary is estimated from a sample IP within a prefix announced by this AS, not from a specific query. Search a real IP for exact details.
Network
AS Number
AS4
Company
University of Southern California
Type
Education
IPv4 Addresses
70,656
IPv6 Addresses
1.58×10²⁹
Registry (RIR)
ARIN
128.9.144.0/20
Abuse Contacts
Announced Prefixes (53)
Netblock
Num. of IPs
RPKI
RPKI Origin Validation
RPKI verifies that an IP prefix is legitimately announced by the authorized Autonomous System (ASN) using Route Origin Authorizations (ROAs).
Unknown
No valid ROA was found for this prefix.
UNKNOWN
Validated Prefix
128.9.144.0/20
Authorized ASN
AS4
IP Geolocation
Country
United States
Continent
North America
European Union
No
Phone prefix
+1
Currency
US Dollar (USD $)
Approximate location (country-level)
Open in Maps