% 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 '89.216.128.0 - 89.216.191.255'

% Abuse contact for '89.216.128.0 - 89.216.191.255' is 'abuse@sbb.rs'

inetnum:        89.216.128.0 - 89.216.191.255
netname:        SBBNET
descr:          Serbia BroadBand
descr:          IP Range for cable modem customers
country:        RS
admin-c:        DS2087-RIPE
tech-c:         NK738-RIPE
status:         ASSIGNED PA
mnt-by:         SBB-MNT
mnt-lower:      SBB-MNT
mnt-routes:     SBB-MNT
created:        2006-09-10T10:54:26Z
last-modified:  2013-03-03T09:10:16Z
source:         RIPE

person:         Dragan Solak
address:        Serbia BroadBand - SBB
address:        Bulevar Zorana Djindjica 8a
address:        11000 Beograd, Srbija
phone:          +381 11 3305210
phone:          +381 11 3305200
fax-no:         +381 11 3033288
nic-hdl:        DS2087-RIPE
mnt-by:         SBB-MNT
created:        2003-05-28T13:37:59Z
last-modified:  2012-02-02T13:31:14Z
source:         RIPE # Filtered

person:         Nikola Kljukovnica
address:        Serbia BroadBand
address:        Kralja Petra 45
address:        11000 Beograd, Srbija
address:        Serbia
phone:          +381 11 3305206
phone:          +381 11 3305288
fax-no:         +381 11 3033215
nic-hdl:        NK738-RIPE
mnt-by:         SBB-MNT
created:        2006-03-30T16:44:22Z
last-modified:  2017-10-30T21:48:40Z
source:         RIPE # Filtered

% Information related to '89.216.128.0/17AS31042'

route:          89.216.128.0/17
descr:          Serbia Broadband
origin:         AS31042
mnt-by:         SBB-MNT
created:        2013-03-02T10:32:04Z
last-modified:  2015-08-23T13:00:29Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.114 (ABERDEEN)

Search for
IP address lookups			Miscellaneous queries
-l	1st level less specific		-i	Inverse attributes	None admin-c admin-c,tech-c,zone-c author cross-mnt cross-nfy local-as mbrs-by-ref member-of mnt-by mnt-lower mnt-nfy mnt-routes notify nserver origin person referral-by rev-srv sub-dom tech-c upd-to zone-c
-L	All less specific		-T	Object types	All as-block as-set aut-num domain filter-set inet-rtr inet6num inetnum irt key-cert mntner peering-set person role route route-set rtr-set
-m	1st level more specific
-M	All more specific		Query hints Include "AS" in front of an AS number. Example: AS4808 Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template Example: -t inetnum
-x	Exact match only
-d	Associated reverse domain