% 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 '81.175.116.16 - 81.175.116.31'

% Abuse contact for '81.175.116.16 - 81.175.116.31' is 'abuse@ziggo.nl'

inetnum:        81.175.116.16 - 81.175.116.31
netname:        PT-NL-CIA-CSG-COMENIUS
descr:          CSG Comenius
country:        NL
admin-c:        EB1459-RIPE
tech-c:         EB1459-RIPE
admin-c:        PTNO1-RIPE
tech-c:         PTHM1-RIPE
status:         ASSIGNED PA
mnt-by:         ZIGGO-SERVICES-MNT
mnt-lower:      ZIGGO-AUTOREG1
mnt-routes:     AS6830-MNT
created:        2005-09-07T12:54:56Z
last-modified:  2018-02-22T15:55:21Z
source:         RIPE

role:           Ziggo Services B.V. Hostmasters
address:        Ziggo Services B.V.
address:        Kabelweg 51
address:        1014 BA Amsterdam
address:        The Netherlands
phone:          +31 (0)88 716 4444
tech-c:         MB5261-RIPE
tech-c:         BH4773-RIPE
nic-hdl:        PTHM1-RIPE
mnt-by:         ZIGGO-SERVICES-MNT
mnt-by:         ZIGGO-MNT
created:        2002-05-03T14:56:02Z
last-modified:  2021-05-07T07:14:43Z
source:         RIPE # Filtered
abuse-mailbox:  abuse@ziggo.nl

role:           VodafoneZiggo B2B NL NO
address:        VodafoneZiggo B2B NL
address:        Kabelweg 51
address:        1014 BA Amsterdam
address:        The Netherlands
phone:          +31 (0)20 775 5000
phone:          +31(0)88 717 0000
remarks:        trouble: abuse@ziggo.nl
admin-c:        BH4773-RIPE
tech-c:         PTHM1-RIPE
nic-hdl:        PTNO1-RIPE
mnt-by:         ZIGGO-SERVICES-MNT
created:        2002-05-03T14:56:02Z
last-modified:  2021-04-08T13:43:15Z
source:         RIPE # Filtered
abuse-mailbox:  abuse@ziggo.nl

person:         Erich Bouwkamp
address:        CSG Comenius
address:        Oostergoweg 1C
address:        8911MA Leeuwarden
address:        Netherlands
phone:          +31 58 212 4531
nic-hdl:        EB1459-RIPE
mnt-by:         ZIGGO-SERVICES-MNT
created:        2005-09-07T12:54:55Z
last-modified:  2020-08-04T10:57:15Z
source:         RIPE # Filtered

% Information related to '81.175.96.0/19AS33915'

route:          81.175.96.0/19
descr:          VODAFONE_ZIGGO
remarks:        Infrastructure and Customer Assignments B2B
origin:         AS33915
mnt-by:         ZIGGO-SERVICES-MNT
mnt-by:         TNF-MNT
created:        2021-03-02T15:03:46Z
last-modified:  2022-11-22T09:24:02Z
source:         RIPE # Filtered

% 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