% 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 '154.121.0.0 - 154.121.255.255'

% No abuse contact registered for 154.121.0.0 - 154.121.255.255

inetnum:        154.121.0.0 - 154.121.255.255
netname:        MOBILIS-3G-NETWORK
descr:          Algerie Telecom Mobile MOBILIS
country:        DZ
org:            ORG-ATMM1-AFRINIC
admin-c:        BR20-AFRINIC
tech-c:         BR20-AFRINIC
status:         ALLOCATED PA
mnt-by:         AFRINIC-HM-MNT
mnt-lower:      MOBILIS-MNT
source:         AFRINIC # Filtered
parent:         154.0.0.0 - 154.255.255.255

organisation:   ORG-ATMM1-AFRINIC
org-name:       Algerie Telecom Mobile MOBILIS
org-type:       LIR
country:        DZ
address:        TM Mobilis
address:        Quartier des Affaires
address:        Bab Ezzouar
address:        Algiers 16110
phone:          tel:+213-23-92-13-13
phone:          tel:+213-23-92-13-13
phone:          tel:+213-661-50-21-02
phone:          tel:+213-661-69-85-43
phone:          tel:+213-661-68-23-78
fax-no:         tel:+213-23-92-12-24
admin-c:        BR20-AFRINIC
tech-c:         BR20-AFRINIC
mnt-ref:        AFRINIC-HM-MNT
mnt-ref:        MOBILIS-MNT
mnt-by:         AFRINIC-HM-MNT
source:         AFRINIC # Filtered

person:         Benliksira Rochdi
address:        ATM Mobilis Bab Ezzouar
address:        AlGER BAG-EZZOUAR 16024
address:        Algeria
phone:          tel:+213-670-23-58-74
nic-hdl:        BR20-AFRINIC
source:         AFRINIC # Filtered
mnt-by:         GENERATED-QBL0HPI6SBEXU9RQ08TEMSCDG0ZIPWKY-MNT

% Information related to '154.121.0.0/16AS327712'

route:          154.121.0.0/16
descr:          Route Object ATM All IP
origin:         AS327712
mnt-by:         Mobilis-MNT
source:         AFRINIC # Filtered

Search for
IP address lookups			Miscellaneous queries
-l	1st level less specific		-i	Inverse attributes	None admin-c admin-c,tech-c,zone-c author cross-mnt cross-nfy local-as mbrs-by-ref member-of mnt-by mnt-lower mnt-nfy mnt-routes notify nserver origin person referral-by rev-srv sub-dom tech-c upd-to zone-c
-L	All less specific		-T	Object types	All as-block as-set aut-num domain filter-set inet-rtr inet6num inetnum irt key-cert mntner peering-set person role route route-set rtr-set
-m	1st level more specific
-M	All more specific		Query hints Include "AS" in front of an AS number. Example: AS4808 Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template Example: -t inetnum
-x	Exact match only
-d	Associated reverse domain