This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402573
IANA has recorded AS21688 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS21688\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: 21688
ASName: GMP-METROCAST
ASHandle: AS21688
RegDate: 2006-12-08
Updated: 2018-03-07
Ref: https://rdap.arin.net/registry/autnum/21688
OrgName: Breezeline
OrgId: ATLAN-19
Address: Batterymarch Park
Address: Suite 200
City: Quincy
StateProv: MA
PostalCode: 02169
Country: US
RegDate: 2004-04-15
Updated: 2026-04-02
Comment: Please send all Abuse complaints to
Comment: abuse@breezeline.com
Ref: https://rdap.arin.net/registry/entity/ATLAN-19
OrgTechHandle: NETWO10527-ARIN
OrgTechName: Network Admin
OrgTechPhone: +1-212-555-1212
OrgTechEmail: daniel.carpentier@cogeco.com
OrgTechRef: https://rdap.arin.net/registry/entity/NETWO10527-ARIN
OrgAbuseHandle: ABUSE9561-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-866-382-3087
OrgAbuseEmail: abuse@breezeline.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE9561-ARIN
OrgNOCHandle: NOC34168-ARIN
OrgNOCName: NOC
OrgNOCPhone: +1-866-382-3087
OrgNOCEmail: nhnoc@breezeline.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC34168-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.
#