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 AS12103 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS12103\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: 12103
ASName: AS-DYNATRACE-02
ASHandle: AS12103
RegDate: 2018-11-08
Updated: 2018-11-08
Ref: https://rdap.arin.net/registry/autnum/12103
OrgName: Dynatrace
OrgId: DL-347
Address: 1601 Trapelo Road, Suite 116
City: Waltham
StateProv: MA
PostalCode: 02451
Country: US
RegDate: 2016-03-22
Updated: 2018-03-21
Ref: https://rdap.arin.net/registry/entity/DL-347
OrgTechHandle: ONE18-ARIN
OrgTechName: OPS Network Engineering
OrgTechPhone: +1-781-530-1000
OrgTechEmail: OPSNetworkEngineering@dynatrace.com
OrgTechRef: https://rdap.arin.net/registry/entity/ONE18-ARIN
OrgNOCHandle: ONE18-ARIN
OrgNOCName: OPS Network Engineering
OrgNOCPhone: +1-781-530-1000
OrgNOCEmail: OPSNetworkEngineering@dynatrace.com
OrgNOCRef: https://rdap.arin.net/registry/entity/ONE18-ARIN
OrgAbuseHandle: ONE18-ARIN
OrgAbuseName: OPS Network Engineering
OrgAbusePhone: +1-781-530-1000
OrgAbuseEmail: OPSNetworkEngineering@dynatrace.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ONE18-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.
#