% 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 '102.91.0.0 - 102.91.31.255'

% No abuse contact registered for 102.91.0.0 - 102.91.31.255

inetnum:        102.91.0.0 - 102.91.31.255
netname:        MTNN-ABUJA-REGION-PREFIXES
descr:          MTNN-ABUJA-REGION-PREFIXES
country:        NG
admin-c:        BRM1-AFRINIC
tech-c:         ISP1-AFRINIC
status:         ASSIGNED PA
mnt-by:         MTNNIGERA1-MNT
source:         AFRINIC # Filtered
parent:         102.88.0.0 - 102.95.255.255

person:         Business Risk Management
address:        Golden Plaza Building, Falomo roundabout, ikoyi
phone:          +08031230141
nic-hdl:        BRM1-AFRINIC
abuse-mailbox:  abuse@mtnnigeria.net
mnt-by:         GENERATED-5DN7BDIQBRY0JCMBEE6EBZSP56LLR9GU-MNT
source:         AFRINIC # Filtered

person:         Internet Services Planning
nic-hdl:        ISP1-AFRINIC
address:        Yellodrome building, adeola hopewell street, Victoria island
address:        Lagos
address:        Other
phone:          tel:+234-803-123-0141
mnt-by:         MTNNIGERA1-MNT
source:         AFRINIC # Filtered

% Information related to '102.91.4.0/24AS29465'

route:          102.91.4.0/24
origin:         AS29465
descr:          MTN NIGERIA PREFIX
mnt-by:         MTNNIGERA1-MNT
source:         AFRINIC # Filtered