% 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 '195.187.73.0 - 195.187.73.255'

% Abuse contact for '195.187.73.0 - 195.187.73.255' is 'abuse@nask.pl'

inetnum:        195.187.73.0 - 195.187.73.255
netname:        ITB
descr:          Instytut Techniki Budowlanej
country:        PL
admin-c:        NASK-HM
tech-c:         NASK-HM
status:         ASSIGNED PA
remarks:        There is currently no valid contact for this object
remarks:        so there is NASK-HM used instead
mnt-by:         AS1887-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2001-09-21T22:21:32Z
source:         RIPE # Filtered

person:         NASK Hostmasters
address:        ul. Wawozowa 18
address:        02-796 Warszawa
phone:          +48 22 380 82 00
phone:          +48 22 380 82 04
fax-no:         +48 22 380 82 01
nic-hdl:        NASK-HM
mnt-by:         NASK-MNT
remarks:        To report abuse or security problems mail cert@cert.pl
created:        2002-08-13T10:09:30Z
last-modified:  2006-01-13T12:59:53Z
source:         RIPE # Filtered

% Information related to '195.187.64.0/18AS1887'

route:          195.187.64.0/18
descr:          NASK (PL)
descr:          Provider Local Registry
origin:         AS1887
mnt-by:         AS1887-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2001-09-22T09:32:38Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.120 (SHETLAND)