% APNIC found the following authoritative answer from: whois.ripe.net

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% The objects are in RPSL format.
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% Information related to 'AS15400 - AS15474'

as-block:       AS15400 - AS15474
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:        2018-11-22T15:27:25Z
last-modified:  2018-11-22T15:27:25Z
source:         RIPE

% Information related to 'AS15432'

% Abuse contact for 'AS15432' is 'lir@isi.ch'

aut-num:        AS15432
org:            ORG-ISI1-RIPE
as-name:        TP-ZUERICH
descr:          Technopark Zuerich, CH
import:         from AS8220 action pref=40; accept ANY
import:         from AS12755 action pref=200; accept ANY
import:         from AS174 action pref=50; accept ANY
export:         to AS12755 announce AS15432
export:         to AS8220 announce AS15432
export:         to AS174 announce AS15432
admin-c:        REM2-RIPE
tech-c:         REM2-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         ISI-MNT
mnt-by:         default_isi_mnt
created:        1970-01-01T00:00:00Z
last-modified:  2019-11-15T10:56:42Z
source:         RIPE

organisation:   ORG-ISI1-RIPE
org-name:       Internet Services Inc
country:        CH
org-type:       LIR
address:        Schellenhausstrasse 4
address:        5620
address:        Bremgarten AG
address:        SWITZERLAND
phone:          +41 44 280 3491
fax-no:         +41 44 280 3497
abuse-c:        AR14324-RIPE
admin-c:        FE6-RIPE
admin-c:        REM2-RIPE
mnt-ref:        ISI-MNT
mnt-ref:        default_isi_mnt
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         default_isi_mnt
created:        2004-04-17T11:02:39Z
last-modified:  2023-06-26T09:59:50Z
source:         RIPE # Filtered

person:         Reginald Mueller
address:        INTERNET SERVICES INC
address:        Bedestr. 105a
address:        P.O.Box
address:        8027 Zuerich
address:        Switzerland
phone:          +41 44 280 3491
fax-no:         +41 44 280 3497
nic-hdl:        REM2-RIPE
created:        1970-01-01T00:00:00Z
last-modified:  2016-04-05T16:48:51Z
mnt-by:         RIPE-NCC-LOCKED-MNT
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.114 (BUSA)

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