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 AS81 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS81\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: 81
ASName: NCREN
ASHandle: AS81
RegDate: 1986-08-07
Updated: 2021-06-29
Ref: https://rdap.arin.net/registry/autnum/81
OrgName: MCNC
OrgId: MCNC-Z
Address: 3021 E. Cornwallis Rd
City: Durham
StateProv: NC
PostalCode: 27713-2852
Country: US
RegDate: 2021-06-14
Updated: 2026-02-12
Ref: https://rdap.arin.net/registry/entity/MCNC-Z
OrgTechHandle: NCREN-ARIN
OrgTechName: NCREN Hostmaster
OrgTechPhone: +1-919-248-4111
OrgTechEmail: hostmaster@ncren.net
OrgTechRef: https://rdap.arin.net/registry/entity/NCREN-ARIN
OrgAbuseHandle: ABUSE3348-ARIN
OrgAbuseName: Abuse Contact
OrgAbusePhone: +1-919-248-4111
OrgAbuseEmail: abuse@mcnc.org
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE3348-ARIN
RTechHandle: NH34-ORG-ARIN
RTechName: NCREN Hostmaster
RTechPhone: +1-919-248-4111
RTechEmail: hostmaster@ncren.net
RTechRef: https://rdap.arin.net/registry/entity/NH34-ORG-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.
#