% 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 '156.0.212.0 - 156.0.212.255'

% No abuse contact registered for 156.0.212.0 - 156.0.212.255

inetnum:        156.0.212.0 - 156.0.212.255
netname:        NETWORK_FOR_2G_INTERNET_USAGE
descr:          Sous classe utilisée pour l'accès Internet aux abonnés du réseau Mobile.
country:        BJ
admin-c:        EBS1-AFRINIC
tech-c:         EBS1-AFRINIC
status:         ASSIGNED PA
remarks:        ETISALAT
mnt-by:         ETISALATBENIN
source:         AFRINIC # Filtered
parent:         156.0.212.0 - 156.0.215.255

person:         ETISALAT BENIN SA
address:        01 BP 8052
address:        Avenue Jean Paul II
address:        Cotonou Republique du BENIN
address:        COTONOU  01 BP 8052
address:        Benin
phone:          tel:+229-95-99-20-00
fax-no:         tel:+229-21-31-87-11
nic-hdl:        EBS1-AFRINIC
mnt-by:         GENERATED-DDJANWMYWEWCB96JHWVCRIAXOIPWERK1-MNT
source:         AFRINIC # Filtered

% Information related to '156.0.212.0/22AS37136'

route:          156.0.212.0/22
descr:          Etisalat Benin SA
origin:         AS37136
org:            ORG-EB1-AFRINIC
mnt-by:         ETISALATBENIN
source:         AFRINIC # Filtered

organisation:   ORG-EB1-AFRINIC
org-name:       ETISALAT BENIN
org-type:       LIR
country:        BJ
address:        Avenue Jean Paul II Immeuble ETISALAT BENIN
address:        01 BP 8052
address:        Cotonou 01 BP 8052
phone:          tel:+229-95-00-01-67
phone:          tel:+229-95-99-20-00
admin-c:        EBS1-AFRINIC
tech-c:         EBS1-AFRINIC
mnt-ref:        AFRINIC-HM-MNT
mnt-ref:        ETISALATBENIN
mnt-by:         AFRINIC-HM-MNT
source:         AFRINIC # Filtered