% 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 '2001:42c8:0:300::/56'

% No abuse contact registered for 2001:42c8:0:300::/56

inet6num:       2001:42c8:0:300::/56
netname:        Johannesburg-TATAC
descr:          Customers access -126 and BB internal use
country:        ZA
admin-c:        IA10-AFRINIC
tech-c:         IA10-AFRINIC
status:         ASSIGNED PA
mnt-by:         AFRINIC-HM-MNT
source:         AFRINIC # Filtered
parent:         2001:42c8::/32

person:         IP ADMIN
address:        Tata Communications Ltd.
address:        Global Customer Service Centre,
address:        Alandi Road, Dighi,
phone:          tel:+91-20-6635-7230
nic-hdl:        IA10-AFRINIC
mnt-by:         GENERATED-LKL5Q1FCKIRO8C1RKTGOASXCCY9DBB2P-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
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-d	Associated reverse domain