% 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://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '212.67.66.96 - 212.67.66.127'

% Abuse contact for '212.67.66.96 - 212.67.66.127' is 'abuse@t-mobile.cz'

inetnum:        212.67.66.96 - 212.67.66.127
netname:        OBECNI-DUM-NET
descr:          Obecni dum
descr:          Namesti Republiky 5/1090
descr:          Praha 1
descr:          110 00
country:        CZ
admin-c:        ET278-RIPE
tech-c:         FB206-RIPE
status:         ASSIGNED PA
mnt-by:         AS12767-MNT
created:        2002-06-13T13:11:42Z
last-modified:  2009-06-26T09:41:07Z
source:         RIPE # Filtered

person:         Evzen Tesarik
address:        Obecni Dum Praha
address:        Namesti Republiky 5
address:        Praha 1
address:        110 00
address:        The Czech Republic
phone:          +420 2 22002143
nic-hdl:        ET278-RIPE
created:        1970-01-01T00:00:00Z
last-modified:  2020-06-04T10:58:40Z
source:         RIPE
mnt-by:         AS13036-MNT

person:         Frantisek Barac
address:        Faculty of Physical Education and Sport
address:        Martiho 31
address:        Praha 6
address:        162 52
address:        The Czech Republic
phone:          +420 603 266483
nic-hdl:        FB206-RIPE
created:        1970-01-01T00:00:00Z
last-modified:  2020-06-04T10:59:39Z
source:         RIPE # Filtered
mnt-by:         AS13036-MNT

% Information related to '212.67.64.0/19AS12767'

route:          212.67.64.0/19
descr:          AS-PRAGONET aggregate
member-of:      AS12767:RS-PA-PRAGONET
origin:         AS12767
mnt-by:         AS12767-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2016-09-25T16:16:08Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.112 (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