% 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 'AS1877 - AS1903'

as-block:       AS1877 - AS1903
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:14Z
last-modified:  2018-11-22T15:27:14Z
source:         RIPE

% Information related to 'AS1888'

% Abuse contact for 'AS1888' is 'abuse@surfnet.nl'

aut-num:        AS1888
as-name:        CWI-NL
org:            ORG-CCvW1-RIPE
remarks:        Amsterdam
remarks:        The Netherlands
import:         from AS1103
                action pref=90;
                accept AS1103
import:         from AS1104
                action pref=80;
                accept AS1104
import:         from AS1124
                action pref=70;
                accept AS1124
import:         from AS1126
                action pref=60;
                accept AS1126
export:         to AS1103
                announce AS1888
export:         to AS1104
                announce AS1888
export:         to AS1124
                announce AS1888
export:         to AS1126
                announce AS1888
default:        to AS1103
                action pref=90;
                networks ANY
admin-c:        CWI1024-RIPE
tech-c:         CWI1024-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         AS1888-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2017-11-15T09:14:24Z
source:         RIPE # Filtered
sponsoring-org: ORG-Sb3-RIPE

organisation:   ORG-CCvW1-RIPE
org-name:       Stichting Centrum voor Wiskunde en Informatica
country:        NL
org-type:       OTHER
address:        Kruislaan 413
address:        NL-1098 SJ Amsterdam
address:        NL
abuse-c:        AR22878-RIPE
mnt-ref:        RIPE-ERX-MNT
mnt-by:         RIPE-ERX-MNT
created:        2004-11-03T15:42:47Z
last-modified:  2022-12-01T17:08:54Z
source:         RIPE # Filtered

role:           CWI ITF
address:        Centrum Wiskunde & Informatica Science Park 123 NL-1098 XG Amsterdam The Netherlands
phone:          +31 (0)20 592 9333
fax-no:         +31 (0)20 592 4199
remarks:        Please contact "abuse@cwi.nl" for complaints and/or abuse
admin-c:        HR1024-RIPE
tech-c:         HR1024-RIPE
mnt-by:         AS1888-MNT
nic-hdl:        CWI1024-RIPE
created:        2004-10-06T10:16:49Z
last-modified:  2017-05-08T10:01:06Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.112 (ABERDEEN)

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