% 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 '84.43.128.0 - 84.43.159.255'

% Abuse contact for '84.43.128.0 - 84.43.159.255' is 'abuse@mnet.bg'

inetnum:        84.43.128.0 - 84.43.159.255
netname:        MNETBG
descr:          MNET Internet provider
descr:          Varna 9000, Bulgaria
country:        BG
admin-c:        MNBG1-RIPE
tech-c:         MNBG1-RIPE
tech-c:         NK1499-RIPE
mnt-lower:      MNET-BG-MNT
mnt-domains:    MNET-BG-MNT
status:         ASSIGNED PA
mnt-by:         MNET-BG-MNT
created:        2004-09-16T14:06:35Z
last-modified:  2021-07-12T15:14:56Z
source:         RIPE

role:           MNET-BG Role object
remarks:        trouble: all technical and administrative issues
remarks:        trouble: regarding MNET-BG address space,
remarks:        trouble: authonomous system number and domains
remarks:        trouble: abuse, hacking attempts, misuse
abuse-mailbox:  abuse@mnet.bg
address:        MSAT Cable TV, MNET dept.
address:        6 Mir Str.
address:        9000 Varna
address:        Bulgaria
phone:          +359 700 42142
admin-c:        EP9557-RIPE
tech-c:         KD4460-RIPE
nic-hdl:        MNBG1-RIPE
mnt-by:         MNET-BG-MNT
created:        2003-02-04T10:10:52Z
last-modified:  2023-08-29T12:59:43Z
source:         RIPE # Filtered

person:         Nikola Kolev
address:        MSAT
address:        6 Mir Str.
address:        9010 Varna
address:        Bulgaria
phone:          +35952 308008
fax-no:         +35952 301301
mnt-by:         MNET-BG-MNT
nic-hdl:        NK1499-RIPE
created:        1970-01-01T00:00:00Z
last-modified:  2004-09-09T07:04:55Z
source:         RIPE # Filtered

% Information related to '84.43.128.0/19AS21230'

route:          84.43.128.0/19
descr:          MNET BG Block
origin:         AS21230
mnt-by:         MNET-BG-MNT
created:        2004-09-22T13:26:32Z
last-modified:  2004-09-22T13:26:32Z
source:         RIPE

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

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