This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402603
IANA has recorded AS600 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS600\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: 600
ASName: OARNET-AS
ASHandle: AS600
RegDate: 1990-03-11
Updated: 2019-11-06
Ref: https://rdap.arin.net/registry/autnum/600
OrgName: OARnet
OrgId: OAR-Z
Address: 1224 Kinnear Road
Address: Columbus
City: Columbus
StateProv: OH
PostalCode: 43212-1198
Country: US
RegDate: 2010-01-04
Updated: 2020-03-27
Ref: https://rdap.arin.net/registry/entity/OAR-Z
OrgNOCHandle: NOC2069-ARIN
OrgNOCName: Network Operations Center
OrgNOCPhone: +1-800-627-6420
OrgNOCEmail: support@oar.net
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
OrgTechHandle: NOC2069-ARIN
OrgTechName: Network Operations Center
OrgTechPhone: +1-800-627-6420
OrgTechEmail: support@oar.net
OrgTechRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
OrgRoutingHandle: NOC2069-ARIN
OrgRoutingName: Network Operations Center
OrgRoutingPhone: +1-800-627-6420
OrgRoutingEmail: support@oar.net
OrgRoutingRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
OrgDNSHandle: NOC2069-ARIN
OrgDNSName: Network Operations Center
OrgDNSPhone: +1-800-627-6420
OrgDNSEmail: support@oar.net
OrgDNSRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
OrgAbuseHandle: NOC2069-ARIN
OrgAbuseName: Network Operations Center
OrgAbusePhone: +1-800-627-6420
OrgAbuseEmail: support@oar.net
OrgAbuseRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
RAbuseHandle: NOC2069-ARIN
RAbuseName: Network Operations Center
RAbusePhone: +1-800-627-6420
RAbuseEmail: support@oar.net
RAbuseRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
RNOCHandle: NOC2069-ARIN
RNOCName: Network Operations Center
RNOCPhone: +1-800-627-6420
RNOCEmail: support@oar.net
RNOCRef: https://rdap.arin.net/registry/entity/NOC2069-ARIN
RTechHandle: NOC2069-ARIN
RTechName: Network Operations Center
RTechPhone: +1-800-627-6420
RTechEmail: support@oar.net
RTechRef: https://rdap.arin.net/registry/entity/NOC2069-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.
#