This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402332
IANA has recorded AS4527 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS4527\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: 4527
ASName: RCN-AS-1
ASHandle: AS4527
RegDate: 2001-06-29
Updated: 2013-10-02
Ref: https://rdap.arin.net/registry/autnum/4527
OrgName: RCN
OrgId: RTSL-6
Address: 650 College Road East
City: Princeton
StateProv: NJ
PostalCode: 08540
Country: US
RegDate: 2013-07-09
Updated: 2022-08-30
Comment: For all abuse issues, please contact abuse@rcn.com
Ref: https://rdap.arin.net/registry/entity/RTSL-6
ReferralServer: rwhois://rwhois.rcn.net:4321
OrgAbuseHandle: RAD75-ARIN
OrgAbuseName: RCN Abuse Department
OrgAbusePhone: +1-888-972-6622
OrgAbuseEmail: abuse@rcn.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/RAD75-ARIN
OrgTechHandle: ZR40-ARIN
OrgTechName: RCN Corporation
OrgTechPhone: +1-888-972-6622
OrgTechEmail: noc@rcn.com
OrgTechRef: https://rdap.arin.net/registry/entity/ZR40-ARIN
OrgNOCHandle: ABN3-ARIN
OrgNOCName: Astound Broadband NOC
OrgNOCPhone: +1-888-972-6622
OrgNOCEmail: noc@astound.com
OrgNOCRef: https://rdap.arin.net/registry/entity/ABN3-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.
#
Found a referral to rwhois.rcn.net:4321.
%rwhois V-1.5:003fff:00 rwhois.rcn.net (by Network Solutions, Inc. V-1.5.9.6)
%error 230 No Objects Found