% 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 '87.237.136.0 - 87.237.139.255'

% Abuse contact for '87.237.136.0 - 87.237.139.255' is 'abuse@gazprom.ru'

inetnum:        87.237.136.0 - 87.237.139.255
netname:        GAZTELECOM-MOSCOW
descr:          LLC "Gazprom telecom"
country:        RU
admin-c:        GTC777-RIPE
tech-c:         GTC777-RIPE
status:         ASSIGNED PA
mnt-by:         GAZTELECOM-MNT
mnt-by:         GAZSVYAZ-RIPE-MNT
mnt-lower:      GAZTELECOM-MNT
mnt-routes:     GAZTELECOM-MNT
mnt-domains:    GAZTELECOM-MNT
created:        2009-12-28T13:10:43Z
last-modified:  2019-12-18T08:06:39Z
source:         RIPE # Filtered

role:           Gazprom telecom NOC
remarks:        Gazprom telecom LLC Network operations center
phone:          +7 495 428 40 03
abuse-mailbox:  noc@gtconline.ru
address:        Russian Federation, Moscow, Starokaluzhskoye shosse 62, b.2
remarks:        -----------------------------------------------------------
remarks:        Gazprom telecom LLC Network operations center
remarks:        -----------------------------------------------------------
remarks:        Customer support service: support@gazpromtelecom.ru
remarks:        Routing and peering issues: noc@gtconline.ru
remarks:        SPAM and virus issues: noc@gtconline.ru
remarks:        Network security issues: noc@gtconline.ru
remarks:        Registration issues: noc@gtconline.ru
remarks:        -----------------------------------------------------------
org:            ORG-GL3-RIPE
admin-c:        YOB71-RIPE
tech-c:         YOB71-RIPE
nic-hdl:        GTC777-RIPE
mnt-by:         GAZTELECOM-MNT
mnt-by:         GAZSVYAZ-RIPE-MNT
created:        2013-06-04T13:43:33Z
last-modified:  2020-01-28T06:54:29Z
source:         RIPE # Filtered

% Information related to '87.237.138.0/24AS39045'

route:          87.237.138.0/24
descr:          LLC "Gazprom telecom" Obninsk
origin:         AS39045
mnt-by:         GAZTELECOM-MNT
mnt-by:         GAZSVYAZ-RIPE-MNT
created:        2007-06-25T06:50:19Z
last-modified:  2019-12-18T06:41:59Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.112 (SHETLAND)

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