% 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 '157.161.0.0 - 157.161.255.255'

% Abuse contact for '157.161.0.0 - 157.161.255.255' is 'abuse@imp.ch'

inetnum:        157.161.0.0 - 157.161.255.255
org:            ORG-IA5-RIPE
netname:        IMPROWARE
descr:          Improware AG
descr:          Pratteln, Switzerland
country:        CH
admin-c:        PG98
tech-c:         IMP4-RIPE
status:         LEGACY
mnt-by:         IMPNET-MNT
mnt-lower:      IMPNET-MNT
mnt-routes:     IMPNET-MNT
mnt-irt:        IRT-IMPNET
created:        1970-01-01T00:00:00Z
last-modified:  2019-12-04T13:04:08Z
source:         RIPE # Filtered

organisation:   ORG-IA5-RIPE
org-name:       ImproWare AG
country:        CH
org-type:       LIR
address:        Zurlindenstrasse 29
address:        4133
address:        Pratteln
address:        SWITZERLAND
phone:          +41 61 826 93 00
admin-c:        PG98
admin-c:        TM163-RIPE
admin-c:        BP410-RIPE
admin-c:        BF388-RIPE
mnt-ref:        IMPNET-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         IMPNET-MNT
abuse-c:        IMP4-RIPE
created:        2004-04-17T11:02:34Z
last-modified:  2024-01-10T13:03:02Z
source:         RIPE # Filtered

role:           Hostmaster ImproWare Network Services AG
address:        Zurlindenstrasse 29
address:        CH-4133 Pratteln
address:        Switzerland
phone:          +41 61 8269300
fax-no:         +41 61 8269301
remarks:        trouble: abuse complaints for route-objects in AS6772: mailto:abuse@imp.ch
remarks:        trouble: peering/bgp requests/issues: peering@imp.ch
remarks:        trouble: other communication: mailto:hostmaster@imp.ch
admin-c:        PG98
tech-c:         PG98
tech-c:         TM163-RIPE
tech-c:         RW7812-RIPE
tech-c:         BP410-RIPE
tech-c:         BF388-RIPE
nic-hdl:        IMP4-RIPE
mnt-by:         IMPNET-MNT
abuse-mailbox:  abuse@imp.ch
created:        2003-03-21T10:12:01Z
last-modified:  2010-09-14T13:35:56Z
source:         RIPE # Filtered

person:         Patrick Guelat
address:        ImproWare AG
address:        Network Services
address:        Zurlindenstrasse 29
address:        CH-4133 Pratteln
address:        Switzerland
phone:          +41 61 826 9300
fax-no:         +41 61 826 9301
nic-hdl:        PG98
mnt-by:         IMPNET-MNT
created:        2001-11-01T10:39:54Z
last-modified:  2001-11-01T10:39:54Z
source:         RIPE # Filtered

% Information related to '157.161.0.0/16AS6772'

route:          157.161.0.0/16
descr:          ImproWare AG
descr:          Switzerland
origin:         AS6772
mnt-by:         IMPNET-MNT
created:        2001-11-01T14:45:09Z
last-modified:  2001-11-01T14:45:09Z
source:         RIPE

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