% 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 '37.29.192.0 - 37.29.255.255'

% Abuse contact for '37.29.192.0 - 37.29.255.255' is 'abuse.es@masorange.es'

inetnum:        37.29.192.0 - 37.29.255.255
netname:        ES-XFERA-201112
descr:          Xfera Moviles SA / Yoigo
country:        ES
admin-c:        MSF48-RIPE
tech-c:         DBA6-RIPE
status:         ASSIGNED PA
mnt-by:         XFERA-MNT
created:        2012-01-02T08:38:07Z
last-modified:  2020-10-08T13:45:45Z
source:         RIPE

% Information related to '37.29.128.0/17AS15704'

route:          37.29.128.0/17
origin:         AS15704
mnt-by:         MUNDI-MNT
created:        2020-07-02T08:27:29Z
last-modified:  2020-07-02T08:27:29Z
source:         RIPE

% Information related to '37.29.128.0/17AS16299'

route:          37.29.128.0/17
descr:          XFERA Moviles S.A.
origin:         AS16299
mnt-by:         XFERA-MNT
mnt-by:         MUNDI-MNT
created:        2013-05-22T06:41:27Z
last-modified:  2018-04-20T08:58:06Z
source:         RIPE

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