% 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 '156.17.0.0 - 156.17.255.255'

% Abuse contact for '156.17.0.0 - 156.17.255.255' is 'abuse@wask.wroc.pl'

inetnum:        156.17.0.0 - 156.17.255.255
netname:        WASK
country:        PL
org:            ORG-WCoN1-RIPE
admin-c:        WO86-RIPE
tech-c:         WO86-RIPE
status:         LEGACY
remarks:        operational in the area of Wroclaw and
remarks:        region of Lower Silesia
remarks:        -------------
remarks:        abuse complaints to: abuse@wask.wroc.pl
remarks:        -------------
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         AS8970-MNT
mnt-lower:      AS8970-MNT
mnt-routes:     AS8970-MNT
mnt-domains:    AS8970-MNT
created:        2002-05-20T09:04:22Z
last-modified:  2016-07-28T09:31:22Z
source:         RIPE # Filtered

% Information related to '156.17.0.0/16AS8970'

route:          156.17.0.0/16
descr:          WASK
origin:         AS8970
mnt-lower:      AS8970-MNT
mnt-routes:     AS8970-MNT
mnt-by:         AS8970-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2006-09-01T08:54:12Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.124.1 (SHETLAND)