% 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 '31.173.242.0 - 31.173.243.255'

% Abuse contact for '31.173.242.0 - 31.173.243.255' is 'abuse-mailbox@megafon.ru'

inetnum:        31.173.242.0 - 31.173.243.255
netname:        MF-SF-AS31205-MOB-PLAN
descr:          Siberian Branch of PJSC MegaFon - Novosibirsk Mobile Clients
country:        RU
geoloc:         55.049478 82.959991
admin-c:        MA23317-RIPE
tech-c:         MA23317-RIPE
status:         ASSIGNED PA
remarks:        INFRA-AW
mnt-by:         GDC-TR-CoreIP
mnt-by:         MEGAFON-RIPE-MNT
mnt-lower:      GDC-TR-CoreIP
mnt-routes:     GDC-TR-CoreIP
mnt-lower:      MEGAFON-AUTO-MNT
created:        2015-02-25T10:13:11Z
mnt-domains:    MEGAFON-DNS-MNT
last-modified:  2023-06-29T07:45:56Z
source:         RIPE

role:           Mobile
address:        Samara
nic-hdl:        MA23317-RIPE
mnt-by:         GDC-TR-CoreIP
created:        2020-02-05T11:44:29Z
last-modified:  2020-02-05T11:44:29Z
source:         RIPE # Filtered

% Information related to '31.173.242.0/23AS31205'

route:          31.173.242.0/23
descr:          Siberian Branch of PJSC MegaFon - Novosibirsk Mobile Clients
origin:         AS31205
mnt-by:         GDC-TR-CoreIP
created:        2015-02-26T12:46:17Z
last-modified:  2021-07-09T07:32:18Z
source:         RIPE

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