% 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 '197.231.0.0 - 197.231.31.255'

% No abuse contact registered for 197.231.0.0 - 197.231.31.255

inetnum:        197.231.0.0 - 197.231.31.255
netname:        chinguitel
descr:          Chinguitel SA
country:        MR
org:            ORG-CS4-AFRINIC
admin-c:        BOM2-AFRINIC
tech-c:         MKC1-AFRINIC
tech-c:         BOM2-AFRINIC
status:         ALLOCATED PA
mnt-by:         AFRINIC-HM-MNT
mnt-lower:      CHINGUITEL-MNT
mnt-domains:    CHINGUITEL-MNT
source:         AFRINIC # Filtered
parent:         197.0.0.0 - 197.255.255.255

organisation:   ORG-CS4-AFRINIC
org-name:       Chinguitel S.A
org-type:       LIR
country:        MR
address:        Tavragh-Zaina ILOT , A 42-142
address:        Nouakchott
phone:          tel:+222-25-00-20-00
fax-no:         tel:+222-25-29-55-90
admin-c:        BOM2-AFRINIC
tech-c:         BOM2-AFRINIC
tech-c:         MKC1-AFRINIC
mnt-ref:        AFRINIC-HM-MNT
mnt-ref:        CHINGUITEL-MNT
mnt-by:         AFRINIC-HM-MNT
source:         AFRINIC # Filtered

person:         Bechir Ould Mounir
address:        Tevragh Zeina, Ilot :ZRB: 92,Nouakchott, Mauritania
phone:          tel:+222-22-00-02-05
nic-hdl:        BOM2-AFRINIC
mnt-by:         GENERATED-8G5HDJJZ9VCBZKBLUMBWAUFAYWSFOWDE-MNT
source:         AFRINIC # Filtered

person:         Mohamed Kaber Cheikhna
address:        Nouakchott-Mauritanie
address:        Nouakchott
address:        Mauritania
phone:          tel:+222-22-00-02-78
nic-hdl:        MKC1-AFRINIC
source:         AFRINIC # Filtered
mnt-by:         GENERATED-1SBXI6UKNFHEG0PMK9XOR2WTAILNOSXG-MNT

% Information related to '197.231.0.0/19AS37541'

route:          197.231.0.0/19
origin:         AS37541
descr:          Chinguitel SA
mnt-by:         CHINGUITEL-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