This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402628
IANA has recorded AS4 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS4\n
#
# 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.
#