% 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 '196.21.61.0 - 196.21.61.255'

% Abuse contact for '196.21.61.0 - 196.21.61.255' is 'abuse@tenet.ac.za'

inetnum:        196.21.61.0 - 196.21.61.255
netname:        NTECH-196-21-61-0
descr:          Durban Institute of Technology
descr:          41/43 Centenary Road
descr:          Greyville
descr:          Durban
descr:          4000
country:        ZA
admin-c:        RBH-AFRINIC
tech-c:         DPI-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:         Doc Pillay
address:        41/43 Centenary Road
address:        Greyville
address:        Durban
address:        4000
address:        ZA
phone:          tel:+1-083-461-6090
phone:          tel:+27-31-308-5212
fax-no:         tel:+1-031-308-5442
nic-hdl:        DPI-AFRINIC
mnt-by:         GENERATED-Y87BXMWW6YSAZTPPPAXXEZMRSQKOOYEB-MNT
source:         AFRINIC # Filtered

person:         Roy Bhagowat
address:        41/43 Centenary Road
address:        Greyville
address:        Durban
address:        4000
address:        ZA
phone:          tel:+1-083-783-1736
phone:          tel:+27-31-308-5248
fax-no:         tel:+1-031-308-5442
nic-hdl:        RBH-AFRINIC
mnt-by:         GENERATED-FMI9UYUDNVH8P3DEC2NDPSDY91EHIDF3-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