% 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 '165.11.0.0 - 165.11.255.255'

% No abuse contact registered for 165.11.0.0 - 165.11.255.255

inetnum:        165.11.0.0 - 165.11.255.255
netname:        SAPOSNET4
descr:          South African Post Office
descr:          Private Bag X846
descr:          Pretoria
descr:          0001
country:        ZA
admin-c:        NMV2-AFRINIC
tech-c:         NMV2-AFRINIC
status:         ASSIGNED PA
mnt-by:         TF-165-8-0-0-165-11-255-255-MNT
mnt-lower:      TF-165-8-0-0-165-11-255-255-MNT
source:         AFRINIC # Filtered
parent:         165.8.0.0 - 165.11.255.255

person:         Manie van Niekerk
address:        Private Bag X846
address:        Pretoria
address:        0001
address:        ZA
phone:          tel:+27-12-325-6117
nic-hdl:        NMV2-AFRINIC
mnt-by:         GENERATED-VWGCEAQTL4BPF3ZU2E1NSAHARPEFFQQU-MNT
source:         AFRINIC # Filtered

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IP address lookups			Miscellaneous queries
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-d	Associated reverse domain