% APNIC found the following authoritative answer from: whois.afrinic.net

% This is the AfriNIC Whois server.
% The AFRINIC whois database is subject to  the following terms of Use. See https://afrinic.net/whois/terms

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

% Information related to '196.21.73.0 - 196.21.77.255'

% Abuse contact for '196.21.73.0 - 196.21.77.255' is 'abuse@tenet.ac.za'

inetnum:        196.21.73.0 - 196.21.77.255
netname:        CPUT-PENTECH-CBLK
descr:          Cape Peninsula University of Technology
descr:          Pentech Campus
descr:          Symphony Way
descr:          Belville South
descr:          Belville
descr:          7535
country:        ZA
admin-c:        SBI-AFRINIC
tech-c:         LR105-AFRINIC
status:         ASSIGNED PA
mnt-by:         TF-196-21-MNT
mnt-lower:      TF-196-21-MNT
source:         AFRINIC # Filtered
parent:         196.21.0.0 - 196.21.255.255

person:         Lawrence Reynolds
address:        Peninsula Technikon
address:        PO Box 1906
address:        Belville
address:        7535
address:        South Africa
address:        ZA
address:        ZA
phone:          tel:+27-21-959-6488
nic-hdl:        LR105-AFRINIC
mnt-by:         GENERATED-PB1HNRIFSVPBBTOM8NQ6CVLVC0FUZNPY-MNT
source:         AFRINIC # Filtered

person:         Samuel Bimray
address:        Symphony Way
address:        Belville South
address:        Belville
address:        7535
address:        ZA
phone:          tel:+1-082-200-6970
phone:          tel:+27-21-959-6805
fax-no:         tel:+1-021-959-6711
nic-hdl:        SBI-AFRINIC
mnt-by:         GENERATED-JENMAKU77C9EVIACXB1PURL9D1OXQVD0-MNT
source:         AFRINIC # Filtered

% Information related to '196.21.0.0/16AS2018'

route:          196.21.0.0/16
descr:          MAINTAINED BY TENET
origin:         AS2018
mnt-by:         TNET-MNT01
source:         AFRINIC # Filtered