% 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 '81.198.48.0 - 81.198.55.255'

% Abuse contact for '81.198.48.0 - 81.198.55.255' is 'abuse@tet.lv'

inetnum:        81.198.48.0 - 81.198.55.255
netname:        LTC-HOME
descr:          Address pool for LTC-HOME customers
country:        LV
admin-c:        ET555-RIPE
tech-c:         JJ777-RIPE
status:         ASSIGNED PA
mnt-by:         LTK
mnt-lower:      LTK
mnt-routes:     LTK
created:        2007-03-28T14:14:34Z
last-modified:  2007-03-28T14:14:34Z
source:         RIPE

person:         Edgars Tone
address:        SIA "Lattelekom"
address:        9. Citadeles Str.
address:        Riga,LV-1010
address:        LATVIA
mnt-by:         LTK
phone:          +371 7325227
nic-hdl:        ET555-RIPE
created:        2004-03-10T07:51:23Z
last-modified:  2009-02-03T12:31:55Z
source:         RIPE # Filtered

person:         Janis Jansons
address:        SIA TET
address:        8 Persess Str.
address:        Riga,LV-1002
mnt-by:         LTK
phone:          +371 29420819
nic-hdl:        JJ777-RIPE
created:        2001-11-27T15:00:24Z
last-modified:  2023-08-28T14:05:04Z
source:         RIPE # Filtered

% Information related to '81.198.0.0/16AS12578'

route:          81.198.0.0/16
descr:          Lattelekom
origin:         AS12578
mnt-by:         AS6747-MNT
mnt-by:         LTK
created:        2002-10-02T12:41:16Z
last-modified:  2009-10-05T11:17:22Z
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