% 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 '87.246.28.0 - 87.246.31.255'

% Abuse contact for '87.246.28.0 - 87.246.31.255' is 'abuse@gcn.bg'

inetnum:        87.246.28.0 - 87.246.31.255
netname:        Eurocrypt
country:        GB
admin-c:        VT4445-RIPE
tech-c:         VT4445-RIPE
mnt-domains:    mnt-bg-eurocrypt-1
mnt-routes:     mnt-bg-eurocrypt-1
status:         ASSIGNED PA
mnt-by:         GlobalComNet
mnt-by:         GCN-LIR-MNT
mnt-by:         CableBulgaria
created:        2022-11-15T08:04:21Z
last-modified:  2023-08-21T16:53:22Z
source:         RIPE

person:         Veselka Todorova
address:        5 "545" Str.
address:        1517
address:        Sofia
address:        BULGARIA
phone:          +359893664944
nic-hdl:        VT4445-RIPE
mnt-by:         mnt-bg-eurocrypt-1
created:        2019-08-14T06:47:24Z
last-modified:  2019-08-14T06:47:25Z
source:         RIPE

% Information related to '87.246.28.0/22AS25211'

route:          87.246.28.0/22
origin:         AS25211
mnt-by:         II1576-RIPE
mnt-by:         GlobalComNet
mnt-by:         GCN-LIR-MNT
mnt-by:         CableBulgaria
created:        2022-11-15T08:09:15Z
last-modified:  2022-11-15T08:09:15Z
source:         RIPE

% Information related to '87.246.28.0/22AS25369'

route:          87.246.28.0/22
origin:         AS25369
mnt-by:         GlobalComNet
mnt-by:         GCN-LIR-MNT
mnt-by:         CableBulgaria
created:        2022-11-18T11:36:15Z
last-modified:  2022-11-18T11:36:15Z
source:         RIPE

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

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