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 AS4545 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS4545\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: 4545
ASName: SONNET-ASN
ASHandle: AS4545
RegDate: 1995-04-19
Updated: 1995-04-19
Ref: https://rdap.arin.net/registry/autnum/4545
OrgName: Sonora ONline
OrgId: SONORA
Address: P.O. Box 5093
City: Sonora
StateProv: CA
PostalCode: 95370
Country: US
RegDate: 1995-03-10
Updated: 2018-11-10
Ref: https://rdap.arin.net/registry/entity/SONORA
OrgTechHandle: BC221-ARIN
OrgTechName: Curnow, Brian
OrgTechPhone: +1-209-532-2750
OrgTechEmail: admin@tuolumne.com
OrgTechRef: https://rdap.arin.net/registry/entity/BC221-ARIN
OrgAbuseHandle: BC221-ARIN
OrgAbuseName: Curnow, Brian
OrgAbusePhone: +1-209-532-2750
OrgAbuseEmail: admin@tuolumne.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/BC221-ARIN
RTechHandle: BC221-ARIN
RTechName: Curnow, Brian
RTechPhone: +1-209-532-2750
RTechEmail: admin@tuolumne.com
RTechRef: https://rdap.arin.net/registry/entity/BC221-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.
#