% 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 '83.235.252.64 - 83.235.252.79'

% Abuse contact for '83.235.252.64 - 83.235.252.79' is 'abuse@ote.gr'

inetnum:        83.235.252.64 - 83.235.252.79
netname:        SYMMETRIC
descr:          TRIPOLI
country:        GR
admin-c:        GT2828-RIPE
tech-c:         IT454-RIPE
status:         ASSIGNED PA
mnt-by:         OTENET-GR-MNT
created:        2007-07-06T07:26:28Z
last-modified:  2008-05-22T15:22:15Z
source:         RIPE

person:         G THEODORAKOPOULOS
address:        TRIPOLI
address:        GR
phone:          +30-2710222444
mnt-by:         otenet-gr-mnt
nic-hdl:        GT2828-RIPE
created:        2008-05-22T15:22:15Z
last-modified:  2008-05-22T15:22:15Z
source:         RIPE

person:         Ioanna Tsagka
address:        Network Operation and Management Center - NOMC
address:        OTE S.A.
address:        GR15124 Athens
address:        Greece
phone:          +30 210 6116215
fax-no:         +30 210 6116215
nic-hdl:        IT454-RIPE
mnt-by:         OTE-ADMIN-MNT
created:        2006-08-08T07:07:57Z
last-modified:  2015-07-23T13:10:55Z
source:         RIPE # Filtered

% Information related to '83.235.0.0/16AS6799'

route:          83.235.0.0/16
descr:          OTEnet
origin:         AS6799
remarks:        OTEnet S.A. Multiprotocol Backbone & ISP
mnt-by:         OTENET-GR-MNT
created:        2004-02-10T10:24:15Z
last-modified:  2004-02-10T10:24:15Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.116 (ABERDEEN)