% 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 '31.0.80.0 - 31.0.95.255'

% Abuse contact for '31.0.80.0 - 31.0.95.255' is 'abuse@plus.pl'

inetnum:        31.0.80.0 - 31.0.95.255
netname:        PLUSNET
descr:          Polkomtel sp. z o.o.
descr:          Warszawa
country:        PL
org:            ORG-PN5-RIPE
admin-c:        PKL1-RIPE
tech-c:         PKL1-RIPE
status:         ASSIGNED PA
mnt-by:         POLKOMTEL-MNT
mnt-lower:      POLKOMTEL-MNT
mnt-domains:    POLKOMTEL-MNT
mnt-routes:     POLKOMTEL-MNT
created:        2017-05-30T13:19:25Z
last-modified:  2017-05-30T13:19:25Z
source:         RIPE # Filtered

organisation:   ORG-PN5-RIPE
org-name:       Polkomtel Sp. z o.o.
country:        PL
org-type:       LIR
address:        ul. Pulawska 466
address:        02-884
address:        Warszawa
address:        POLAND
phone:          +48 224 261 000
fax-no:         +48224260088
admin-c:        SO1236-RIPE
admin-c:        IN3-RIPE
mnt-ref:        POLKOMTEL-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         POLKOMTEL-MNT
abuse-c:        PKL1-RIPE
tech-c:         SO1236-RIPE
tech-c:         KT3222-RIPE
created:        2004-04-17T11:47:51Z
last-modified:  2023-09-14T13:18:26Z
source:         RIPE # Filtered

role:           PlusGSM IP Team
address:        Polkomtel sp. z o.o.
address:        ul. Konstruktorska 4
address:        02-673 Warszawa
address:        Poland
phone:          +48 22 4261599
fax-no:         +48 22 4260099
remarks:        Plus (pl.plusgsm) registry administration
remarks:        ---
remarks:        Registry contact: registry@plus.pl
remarks:        Spam and abuse reports: abuse@plus.pl
remarks:        ---
abuse-mailbox:  abuse@plus.pl
admin-c:        SO1236-RIPE
admin-c:        IN3-RIPE
tech-c:         KT3222-RIPE
nic-hdl:        PKL1-RIPE
mnt-by:         POLKOMTEL-MNT
created:        2003-10-07T14:54:25Z
last-modified:  2023-07-05T11:50:27Z
source:         RIPE # Filtered

% Information related to '31.0.0.0/16AS8374'

route:          31.0.0.0/16
descr:          Polkomtel Sp. z o.o.
descr:          Warsaw, Poland
origin:         AS8374
mnt-by:         POLKOMTEL-MNT
created:        2024-03-28T10:34:41Z
last-modified:  2024-03-28T10:34:41Z
source:         RIPE # Filtered

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