% APNIC found the following authoritative answer from: whois.ripe.net

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '2a0a:8300::/29'

% Abuse contact for '2a0a:8300::/29' is 'admin@itce.ru'

inet6num:       2a0a:8300::/29
netname:        RU-ELECTRON-TELE-20160928
country:        RU
org:            ORG-LA921-RIPE
admin-c:        EI1192-RIPE
tech-c:         EI1192-RIPE
status:         ALLOCATED-BY-RIR
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         EL-TELECOM-MNT
mnt-routes:     EL-TELECOM-MNT
mnt-domains:    EL-TELECOM-MNT
created:        2016-09-28T12:34:20Z
last-modified:  2018-04-10T12:55:22Z
source:         RIPE

organisation:   ORG-LA921-RIPE
org-name:       LLC "Electron-Telecom"
country:        RU
org-type:       LIR
address:        Olgino district, Glavnaya st. 22
address:        143989
address:        Balashikha
address:        RUSSIAN FEDERATION
phone:          +7 495 522-47-43
admin-c:        EI1192-RIPE
tech-c:         EI1192-RIPE
abuse-c:        AR34429-RIPE
mnt-ref:        EL-TELECOM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         EL-TELECOM-MNT
mnt-ref:        RIPE-NCC-HM-MNT
created:        2015-11-25T14:30:06Z
last-modified:  2021-02-04T14:49:50Z
source:         RIPE # Filtered

person:         Eugene Ippolitov
address:        143989 Glavnaya 22
address:        Balashikha
address:        RUSSIAN FEDERATION
phone:          +7 495 522-47-43
nic-hdl:        EI1192-RIPE
mnt-by:         EL-TELECOM-MNT
created:        2017-11-29T17:53:34Z
last-modified:  2018-02-01T10:07:32Z
source:         RIPE

% Information related to '2a0a:8300::/29AS50911'

route6:         2a0a:8300::/29
origin:         AS50911
mnt-by:         EL-TELECOM-MNT
created:        2017-11-30T13:30:56Z
last-modified:  2017-11-30T13:30:56Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.114 (SHETLAND)

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