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

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% The objects are in RPSL format.
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% Note: this output has been filtered.
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% Information related to '145.120.0.0 - 145.127.255.255'

% Abuse contact for '145.120.0.0 - 145.127.255.255' is 'cert@surfcert.nl'

inetnum:        145.120.0.0 - 145.127.255.255
netname:        SURFNET-EARLY-REGISTRATIONS
descr:          SURFnet bv
descr:          P.O. Box 19035
descr:          Utrecht
descr:          3501 DA
country:        NL
admin-c:        SNS1-RIPE
tech-c:         SNS1-RIPE
org:            ORG-Sb3-RIPE
status:         LEGACY
remarks:        ---------------------------------------------------
remarks:        Use only cert@surfnet.nl to report security incidents.
remarks:        See also http://cert.surfnet.nl/ for more information.
remarks:        ---------------------------------------------------
mnt-by:         SN-LIR-MNT
mnt-lower:      SN-LIR-MNT
mnt-routes:     AS1103-MNT
created:        2017-09-25T08:11:46Z
last-modified:  2017-09-25T08:11:46Z
source:         RIPE

organisation:   ORG-Sb3-RIPE
org-name:       SURF B.V.
country:        NL
org-type:       LIR
address:        P.O. Box 19035
address:        3501 DA
address:        Utrecht
address:        NETHERLANDS
phone:          +31887873000
admin-c:        HT3384-RIPE
admin-c:        MK512-RIPE
admin-c:        SNS1-RIPE
admin-c:        WB311-RIPE
admin-c:        NO17-RIPE
admin-c:        RS957-RIPE
admin-c:        JO5863-RIPE
admin-c:        MM57501-RIPE
abuse-c:        SNS1-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        SN-LIR-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SN-LIR-MNT
created:        2004-04-17T11:43:29Z
last-modified:  2023-02-21T13:35:38Z
source:         RIPE # Filtered

role:           SURF Network Maintainer
address:        Kantoren Hoog Overborch (Hoog Catharijne)
address:        Moreelsepark 48, 3511 EP Utrecht
address:        Postbus 19035, 3501 DA Utrecht
phone:          +31 88 7873000
admin-c:        WB311-RIPE
tech-c:         NO17-RIPE
tech-c:         WB311-RIPE
tech-c:         MK512-RIPE
tech-c:         JO5863-RIPE
tech-c:         MM57501-RIPE
nic-hdl:        SNS1-RIPE
abuse-mailbox:  cert@surfcert.nl
mnt-by:         AS1103-MNT
created:        2002-07-09T10:06:06Z
last-modified:  2024-05-23T04:00:29Z
source:         RIPE # Filtered

% Information related to '145.120.0.0/14AS1103'

route:          145.120.0.0/14
origin:         AS1103
descr:          145.120.0.0/14 aggregate
mnt-by:         AS1103-MNT
created:        2012-04-03T13:39:19Z
last-modified:  2019-03-21T09:01:44Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.116 (ABERDEEN)