% 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://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

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

% Information related to '2a01:5a8::/32'

% Abuse contact for '2a01:5a8::/32' is 'abuse-ip@vivacom.bg'

inet6num:       2a01:5a8::/32
netname:        BG-BTC-20071102
country:        BG
org:            ORG-BTCP1-RIPE
admin-c:        LG700-RIPE
tech-c:         LG700-RIPE
status:         ALLOCATED-BY-RIR
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         BT95-ADM
created:        2007-11-02T12:03:22Z
last-modified:  2018-08-10T08:20:27Z
source:         RIPE # Filtered

organisation:   ORG-BTCP1-RIPE
org-name:       Vivacom Bulgaria EAD
country:        BG
org-type:       LIR
address:        115I, Tsarigradsko shose Blvd.
address:        1784
address:        Sofia
address:        BULGARIA
phone:          +35929494600
fax-no:         +35929331200
admin-c:        BTC3-RIPE
admin-c:        LG700-RIPE
admin-c:        VB2225-RIPE
admin-c:        NP2222-RIPE
admin-c:        IR778-RIPE
admin-c:        SS4127-RIPE
admin-c:        PT1549-RIPE
abuse-c:        BTC3-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        BT95-ADM
mnt-ref:        MNT-GNET
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         BT95-ADM
created:        2004-04-17T11:01:01Z
last-modified:  2022-10-06T13:19:37Z
source:         RIPE # Filtered

person:         Lyubomir Georgiev
address:        BTC Plc
address:        Bulgarian Telecommunications Company Plc
address:        Bulgaria
mnt-by:         BT95-ADM
phone:          +359 2 932 08 38
nic-hdl:        LG700-RIPE
created:        2002-12-27T08:55:53Z
last-modified:  2015-07-02T14:54:31Z
source:         RIPE # Filtered

% Information related to '2a01:5a8:200::/41AS8866'

route6:         2a01:5a8:200::/41
origin:         AS8866
mnt-by:         BT95-ADM
created:        2023-09-10T17:10:31Z
last-modified:  2023-09-10T17:10:31Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.111 (ABERDEEN)

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