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 AS1745 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS1745\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: 1745
ASName: CRT-AS
ASHandle: AS1745
RegDate: 1992-02-19
Updated: 1992-02-19
Ref: https://rdap.arin.net/registry/autnum/1745
OrgName: Chicago Reseach and Trading
OrgId: CRT-19
Address: Suite 3300
Address: 440 South LaSalle St.
City: Chicago
StateProv: IL
PostalCode: 60605
Country: US
RegDate: 1992-02-19
Updated: 2011-09-24
Ref: https://rdap.arin.net/registry/entity/CRT-19
OrgAbuseHandle: CKN23-ARIN
OrgAbuseName: No, Contact Known
OrgAbusePhone: +1-800-555-1234
OrgAbuseEmail: nobody@example.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/CKN23-ARIN
OrgTechHandle: CKN23-ARIN
OrgTechName: No, Contact Known
OrgTechPhone: +1-800-555-1234
OrgTechEmail: nobody@example.com
OrgTechRef: https://rdap.arin.net/registry/entity/CKN23-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.
#