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

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to '203.15.72.0 - 203.15.75.255'

% Abuse contact for '203.15.72.0 - 203.15.75.255' is 'abuse@customerservice.nsw.gov.au'

inetnum:        203.15.72.0 - 203.15.75.255
netname:        NSWPREMIER-AU
descr:          Department of Customer Service
country:        AU
org:            ORG-NDOC1-AP
admin-c:        DOFS1-AP
tech-c:         DOFS1-AP
abuse-c:        AC1684-AP
status:         ALLOCATED PORTABLE
remarks:        ** Conversion note - reference 'GY1-AU' changed to 'DOFS1-AP'
remarks:        Record imported from AUNIC as part of AUNIC->APNIC migration
remarks:        Please see http://www.apnic.net/db/aunic/
mnt-by:         APNIC-HM
mnt-irt:        IRT-CCS-NON-AU
last-modified:  2020-05-27T23:28:31Z
source:         APNIC

irt:            IRT-CCS-NON-AU
address:        Department of Customer Service
address:        22-24 Rawson Place, Sydney NSW 2000
e-mail:         abuse@customerservice.nsw.gov.au
abuse-mailbox:  abuse@customerservice.nsw.gov.au
admin-c:        DOFS1-AP
tech-c:         DOFS1-AP
auth:           # Filtered
remarks:        abuse@customerservice.nsw.gov.au was validated on 2025-12-29
mnt-by:         MAINT-CCS-NON-AU
last-modified:  2025-12-29T20:56:12Z
source:         APNIC

organisation:   ORG-NDOC1-AP
org-name:       Department of Customer Service
org-type:       LIR
country:        AU
address:        attn: Colin Leslie
address:        Service Management Office
phone:          +61-2-82768693
e-mail:         colin.leslie@customerservice.nsw.gov.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:08Z
source:         APNIC

role:           ABUSE CCSNONAU
country:        ZZ
address:        Department of Customer Service
address:        22-24 Rawson Place, Sydney NSW 2000
phone:          +000000000
e-mail:         abuse@customerservice.nsw.gov.au
admin-c:        DOFS1-AP
tech-c:         DOFS1-AP
nic-hdl:        AC1684-AP
remarks:        Generated from irt object IRT-CCS-NON-AU
remarks:        abuse@customerservice.nsw.gov.au was validated on 2025-12-29
abuse-mailbox:  abuse@customerservice.nsw.gov.au
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-29T20:56:58Z
source:         APNIC

role:           Department of Finance Services and Innovation Admin
address:        22-24 Rawson Place, Sydney NSW 2000
country:        AU
phone:          +61 2 92193093
e-mail:         colin.leslie@customerservice.nsw.gov.au
admin-c:        DOFS1-AP
tech-c:         DOFS1-AP
nic-hdl:        DOFS1-AP
mnt-by:         MAINT-CCS-NON-AU
last-modified:  2019-11-21T23:09:27Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.36-SNAPSHOT (WHOIS-AU5)