% APNIC found the following authoritative answer from: whois.ripe.net

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '80.16.0.0 - 80.23.255.255'

% Abuse contact for '80.16.0.0 - 80.23.255.255' is 'abuse@business.telecomitalia.it'

inetnum:        80.16.0.0 - 80.23.255.255
netname:        IT-INTERBUSINESS-20010612
country:        IT
org:            ORG-IA34-RIPE
admin-c:        INAS1-RIPE
tech-c:         INAS1-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         INTERB-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2016-07-11T07:33:59Z
source:         RIPE # Filtered

organisation:   ORG-IA34-RIPE
org-name:       Telecom Italia S.p.A.
country:        IT
org-type:       LIR
address:        Via Oriolo Romano 240
address:        I-00189
address:        Roma
address:        ITALY
phone:          +39 06 36881
admin-c:        GP1340-RIPE
admin-c:        ESB35-RIPE
admin-c:        CC297-RIPE
admin-c:        TT616-RIPE
admin-c:        MG18673-RIPE
admin-c:        ASB144-RIPE
abuse-c:        ABT49-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        INTERB-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         INTERB-MNT
created:        2004-04-17T11:31:45Z
last-modified:  2024-02-01T07:59:39Z
source:         RIPE # Filtered

role:           Interbusiness Network Administration Staff
address:        Telecom Italia S.p.A
address:        Italy
admin-c:        ESB35-RIPE
tech-c:         ESB35-RIPE
tech-c:         ASB144-RIPE
tech-c:         ABT49-RIPE
nic-hdl:        INAS1-RIPE
abuse-mailbox:  abuse@business.telecomitalia.it
mnt-by:         INTERB-MNT
created:        2002-08-01T12:20:54Z
last-modified:  2024-01-16T08:51:36Z
source:         RIPE # Filtered

% Information related to '80.21.0.0/16AS3269'

route:          80.21.0.0/16
descr:          INTERBUSINESS
origin:         AS3269
remarks:        ************************************************
remarks:        * Pay attention *
remarks:        * Any communication sent to email different *
remarks:        * from the following will be ignored! *
remarks:        * Any abuse reports, please send them to *
remarks:        * abuse@business.telecomitalia.it *
remarks:        ************************************************
mnt-by:         INTERB-MNT
created:        2001-12-14T11:03:21Z
last-modified:  2017-07-17T12:28:09Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.117 (SHETLAND)