ASN Lookup Tool

University of Southern California isi.edu US US 47 Routes

AS Data

AS4

AS4University of Southern California

AS Number 4
AS Name ISI-AS
Organization University of Southern California(usc-32-z)
Country US
Website isi.edu
Number of IPv4 Routes 40
Number of IPv6 Routes 7
ASN type EDUCATION
Registry ARIN
Date Allocated 1984-02-22

ASN Intelligence API for production workflows

Use ASN data for AS4 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

IP Ranges

Route # IPs
128.9.43.0/24 256
128.9.30.0/24 256
2001:1878:403::/48 ~1×10²⁴
128.9.35.0/24 256
128.9.18.0/24 256
206.117.27.0/24 256
128.9.47.0/24 256
128.9.144.0/20 4096
128.9.32.0/20 4096
2001:1878:402::/48 ~1×10²⁴

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       4
ASName:         ISI-AS
ASHandle:       AS4
RegDate:        1984-02-22
Updated:        2023-09-29    
Ref:            https://rdap.arin.net/registry/autnum/4


OrgName:        University of Southern California
OrgId:          USC-32-Z
Address:        Information Sciences Institute
Address:        4676 Admiralty Way, Suite 1001
City:           Marina del Rey
StateProv:      CA
PostalCode:     90292
Country:        US
RegDate:        2023-09-08
Updated:        2023-09-21
Ref:            https://rdap.arin.net/registry/entity/USC-32-Z


OrgAbuseHandle: ACT-ORG-ARIN
OrgAbuseName:   IPC Computing Services
OrgAbusePhone:  +1-310-448-8289 
OrgAbuseEmail:  action@isi.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ACT-ORG-ARIN

OrgTechHandle: ACT-ORG-ARIN
OrgTechName:   IPC Computing Services
OrgTechPhone:  +1-310-448-8289 
OrgTechEmail:  action@isi.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/ACT-ORG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS400536 Nodestop LLC US
AS29844 Sena Wave LLC US
AS400215 Sambanova Systems, Inc. US
AS14956 RouterHosting LLC US
AS40950 DediByte, LLC US
AS136617 Fortune Telecom Company Limited MM
AS213186 Yanoor Islam Khan IN
AS147135 PT Swajasa Lintas Media ID
AS226 Los Nettos US
AS214016 Amarebox LLC US

Upstreams

AS Number Description Country
AS400215 Sambanova Systems, Inc. US
AS18450 WebNX, Inc. US
AS30844 Liquid Telecommunications Ltd GB
AS567 Los Nettos US
AS10886 University of Maryland US
AS226 Los Nettos US
AS327753 SBM BANK KENYA LIMITED KE
AS22516 Charter Communications LLC US
AS174 Cogent Communications, LLC US
AS133296 Web Werks India Pvt. Ltd. IN

Downstreams

AS Number Description Country
AS400536 Nodestop LLC US
AS29844 Sena Wave LLC US
AS4307 SOUTH VALLEY INTERNET US
AS213186 Yanoor Islam Khan IN
AS14956 RouterHosting LLC US
AS40950 DediByte, LLC US
AS2635 Automattic, Inc US
AS398091 zx4.com US
AS214016 Amarebox LLC US
AS399282 Connext LLC US

Legacy Routes

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Frequently Asked Questions

ASN AS4 is an Autonomous System Number used to identify a network for BGP internet routing.
AS4 is listed under University of Southern California.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.