% 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 '212.0.128.0 - 212.0.159.255'

% No abuse contact registered for 212.0.128.0 - 212.0.159.255

inetnum:        212.0.128.0 - 212.0.159.255
netname:        SD-SUDATEL-980407
descr:          Sudatel
country:        SD
org:            ORG-SA54-AFRINIC
admin-c:        FM42-AFRINIC
admin-c:        HA41-AFRINIC
tech-c:         SAM4-AFRINIC
tech-c:         FM42-AFRINIC
tech-c:         MM202-AFRINIC
tech-c:         HA41-AFRINIC
tech-c:         AAIA1-AFRINIC
status:         ALLOCATED PA
remarks:        data has been transferred from RIPE Whois Database 20050221
mnt-by:         AFRINIC-HM-MNT
mnt-lower:      SUDATEL-MNT
mnt-lower:      MNT-HIBA
mnt-domains:    SUDATEL-MNT
mnt-routes:     SUDATEL-MNT
source:         AFRINIC # Filtered
parent:         0.0.0.0 - 255.255.255.255

organisation:   ORG-SA54-AFRINIC
org-name:       Sudatel (Sudan Telecom Co. Ltd)
org-type:       LIR
descr:          Telecommunication company
country:        SD
address:        SUDATEL TOWER 5th Floor Khartoum
address:        P.O.Box 11155 Internet and Informatics
address:        11155
address:        Khartoum
address:        khartoum
phone:          tel:+249-18-379-8504
phone:          tel:+249-18-379-8550
phone:          tel:+249-12-012-0838
phone:          tel:+249-12-012-0760
phone:          tel:+249-12-012-0087
phone:          tel:+249-12-012-0060
admin-c:        FM42-AFRINIC
admin-c:        HA41-AFRINIC
tech-c:         AAIA1-AFRINIC
tech-c:         FM42-AFRINIC
tech-c:         SAM4-AFRINIC
tech-c:         HA41-AFRINIC
tech-c:         MM202-AFRINIC
mnt-ref:        AFRINIC-HM-MNT
mnt-ref:        SUDATEL-MNT
mnt-by:         AFRINIC-HM-MNT
source:         AFRINIC # Filtered

person:         Abdelrahman Abdelgaoum Ibrahim Abdelrahmanai
nic-hdl:        AAIA1-AFRINIC
address:        Sudatel Khartoum  Sudan
address:        Khartoum
address:        Sudan
phone:          tel:+249-12-012-3834
mnt-by:         GENERATED-AAUMAF4H8OAMC2QFJBL8PSILEA3ACF6Q-MNT
source:         AFRINIC # Filtered

person:         Fathi Mohamed
address:        SUDATEL TOWER 5th Floor
address:        Khartoum
address:        Sudan
phone:          tel:+249-12-012-3917
nic-hdl:        FM42-AFRINIC
mnt-by:         GENERATED-GFZQHZRD1CKLOXN04TLYMH6RPMTV6EDU-MNT
source:         AFRINIC # Filtered

person:         Hanadi Abd
nic-hdl:        HA41-AFRINIC
address:        SUDATEL TOWER 5th Floor Khartoum
address:        P.O.Box 11155 Internet and Informatics 11155
address:        Khartoum
address:        Sudan
address:        Khartoum
address:        Other
phone:          tel:+249-12-012-3938
mnt-by:         GENERATED-JUQ0TX8MBATUYMMFNTMKWCKRFOE6DKJW-MNT
source:         AFRINIC # Filtered

person:         Mugahid Mohammed
address:        SUDATEL TOWER 5th Floor Khartoum
address:        P.O.Box 11155 Internet and Informatics
address:        Khartoum 11155
address:        Sudan
phone:          tel:+249-12-012-3936
nic-hdl:        MM202-AFRINIC
source:         AFRINIC # Filtered
mnt-by:         GENERATED-EJMIPTSGGLDTOVNVLDUPORDXI1RFC8N2-MNT

person:         Said Ahmed Mustafa
nic-hdl:        SAM4-AFRINIC
address:        Sudan-Khartoum
address:        Khartoum
address:        Sudan
address:        Khartoum
address:        Sudan
phone:          tel:+249-12-012-0998
mnt-by:         GENERATED-0LUQBDWC6U9ZRQK2AKVUKNV2TTKPBBXK-MNT
source:         AFRINIC # Filtered

% Information related to '212.0.136.0/21AS15706'

route:          212.0.136.0/21
descr:          Sudatel-IP
origin:         AS15706
mnt-by:         Sudatel-mnt
source:         AFRINIC # Filtered