% 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 '155.89.0.0 - 155.89.127.255'

% No abuse contact registered for 155.89.0.0 - 155.89.127.255

inetnum:        155.89.0.0 - 155.89.127.255
netname:        POOL_IP_EXPASION_CBLB
descr:          Pool of IPv4 Addresses expansion for Cabolombo's PS
country:        AO
admin-c:        PP1-AFRINIC
admin-c:        HC11-AFRINIC
tech-c:         PP1-AFRINIC
tech-c:         HC11-AFRINIC
status:         ASSIGNED PA
mnt-by:         MOVICEL-MNT
source:         AFRINIC # Filtered
parent:         155.89.0.0 - 155.89.255.255

person:         Hildebrando Costa
nic-hdl:        HC11-AFRINIC
address:        Av. da Samba
address:        Condomínio Rosalinda
address:        Edifício 11A
address:        Luanda
address:        Angola
address:        Luanda
address:        Angola
phone:          tel:+244-912-200-554
mnt-by:         GENERATED-ZZ7B16I6F3GODYWAVMBEHTH9PLDBBRFX-MNT
source:         AFRINIC # Filtered

person:         Pepino Prazer
nic-hdl:        PP1-AFRINIC
address:        Movicel Telecomunicacoes SA
address:        Av. Samba, Condominio Rosalinda, Luanda - Angola
address:        Luanda
address:        Angola
phone:          tel:+244-912-404-213
phone:          tel:+244-912-164-988
phone:          tel:+244-997-202-332
phone:          tel:+244-912-200-298
remarks:        IP Network Engineer
mnt-by:         GENERATED-GFRUKONLFN8VSLQJKCNZUPCEKPVT0ZOS-MNT
source:         AFRINIC # Filtered