% 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 '105.168.0.0 - 105.169.255.255'

% No abuse contact registered for 105.168.0.0 - 105.169.255.255

inetnum:        105.168.0.0 - 105.169.255.255
netname:        UnitelMobileCustomerPool1
descr:          Customer Pool 1
country:        AO
admin-c:        NF5-AFRINIC
tech-c:         NF5-AFRINIC
status:         ASSIGNED PA
remarks:        Unitel Public Segment
mnt-by:         UNITEL-MNT
source:         AFRINIC # Filtered
parent:         105.168.0.0 - 105.175.255.255

person:         Nsilu Ferreira
address:        Rua Kwame Nkrumah
                Edificio Unitel
                Luanda - Angola
phone:          tel:+244-923-191-200
fax-no:         tel:+244-222-372-023
nic-hdl:        NF5-AFRINIC
mnt-by:         GENERATED-XKUN1CLW96DTSTQ7Y2HMRH0L6PDBSCOK-MNT
source:         AFRINIC # Filtered

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IP address lookups			Miscellaneous queries
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-d	Associated reverse domain