% 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://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

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

% Information related to '164.138.88.0 - 164.138.89.255'

% Abuse contact for '164.138.88.0 - 164.138.89.255' is 'abuse@redcom.ru'

inetnum:        164.138.88.0 - 164.138.89.255
netname:        REDCOM-BB-UNLIM-5
descr:          REDCOM Broadband Block 5 for flat-rate access
country:        RU
admin-c:        RNC-RIPE
tech-c:         RNC-RIPE
status:         ASSIGNED PA
mnt-by:         REDCOM-MNT
mnt-lower:      REDCOM-MNT
mnt-routes:     REDCOM-MNT
created:        2012-03-20T07:50:33Z
last-modified:  2012-03-20T07:50:33Z
source:         RIPE # Filtered

person:         Redcom NOC Contact
address:        20, Promyshlennaya street
address:        Khabarovsk, 680009
address:        Russia
phone:          +7 4212 450045
fax-no:         +7 4212 450044
nic-hdl:        RNC-RIPE
mnt-by:         REDCOM-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2017-10-30T21:45:17Z
source:         RIPE # Filtered

% Information related to '164.138.88.0/21AS8749'

route:          164.138.88.0/21
descr:          REDCOM LIR BLOCK 5
origin:         AS8749
mnt-by:         REDCOM-MNT
created:        2012-03-19T20:56:11Z
last-modified:  2012-03-19T20:56:11Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.111 (BUSA)

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