% 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 '91.144.140.0 - 91.144.143.255'

% Abuse contact for '91.144.140.0 - 91.144.143.255' is 'abuse@domru.ru'

inetnum:        91.144.140.0 - 91.144.143.255
netname:        ERTH-KAZAN-NET
descr:          CJSC "Company "ER-Telecom" Kazan'
descr:          Kazan', Russia
descr:          PPPoE Individual customers
country:        RU
admin-c:        NOC97-RIPE
org:            ORG-CHKB2-RIPE
tech-c:         NOC97-RIPE
status:         ASSIGNED PA
mnt-by:         RAID-MNT
created:        2006-10-02T10:54:06Z
last-modified:  2011-01-19T19:02:12Z
source:         RIPE # Filtered

organisation:   ORG-CHKB2-RIPE
org-name:       JSC "ER-Telecom Holding" Kazan' Branch
org-type:       OTHER
descr:          TM DOM.RU, Kazan' ISP
address:        Gvardeyskaya, 54
address:        Kazan', Russia, 420087
phone:          +7 (843) 211-00-44
fax-no:         +7 (843) 211-00-44
admin-c:        NOC97-RIPE
tech-c:         NOC97-RIPE
abuse-c:        RAID1-RIPE
mnt-ref:        RAID-MNT
mnt-by:         RAID-MNT
created:        2011-01-13T10:56:24Z
last-modified:  2019-11-11T11:56:26Z
source:         RIPE # Filtered

role:           Network Operation Center CJSC ER-Telecom Company Kazan' branch
address:        Russian Federation, Tatarstan
address:        420097, Kazan, Zinina st, 7
admin-c:        FKK11-RIPE
admin-c:        AMS103-RIPE
tech-c:         FKK11-RIPE
tech-c:         AMS103-RIPE
nic-hdl:        NOC97-RIPE
created:        2007-01-29T14:10:34Z
last-modified:  2015-05-19T10:22:01Z
source:         RIPE # Filtered
mnt-by:         MNT-ERTHOLDING

% Information related to '91.144.140.0/24AS41668'

route:          91.144.140.0/24
origin:         AS41668
org:            ORG-CHKB2-RIPE
descr:          CJSC "ER-Telecom Holding" Kazan' branch
descr:          Kazan', Russia
mnt-by:         RAID-MNT
created:        2008-02-19T05:10:25Z
last-modified:  2011-01-19T06:12:23Z
source:         RIPE # Filtered

organisation:   ORG-CHKB2-RIPE
org-name:       JSC "ER-Telecom Holding" Kazan' Branch
org-type:       OTHER
descr:          TM DOM.RU, Kazan' ISP
address:        Gvardeyskaya, 54
address:        Kazan', Russia, 420087
phone:          +7 (843) 211-00-44
fax-no:         +7 (843) 211-00-44
admin-c:        NOC97-RIPE
tech-c:         NOC97-RIPE
abuse-c:        RAID1-RIPE
mnt-ref:        RAID-MNT
mnt-by:         RAID-MNT
created:        2011-01-13T10:56:24Z
last-modified:  2019-11-11T11:56:26Z
source:         RIPE # Filtered

% 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