% 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 '103.23.104.0 - 103.23.107.255'

% Abuse contact for '103.23.104.0 - 103.23.107.255' is 'abuse@iperium.com.au'

inetnum:        103.23.104.0 - 103.23.107.255
netname:        SIMTRONIC-TECH-AU
descr:          Simtronic Technologies Pty Ltd
country:        AU
org:            ORG-STPL15-AP
admin-c:        STPL2-AP
tech-c:         STPL2-AP
abuse-c:        AS2290-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-SIMTRONIC-TECH-AU
mnt-routes:     MAINT-SIMTRONIC-TECH-AU
mnt-irt:        IRT-SIMTRONIC-TECH-AU
last-modified:  2020-06-18T09:50:37Z
source:         APNIC

irt:            IRT-SIMTRONIC-TECH-AU
address:        Level 7, 82 Elizabeth Street
address:        Sydney NSW 2000
e-mail:         cm@iperium.com.au
abuse-mailbox:  abuse@iperium.com.au
admin-c:        STPL2-AP
tech-c:         STPL2-AP
auth:           # Filtered
remarks:        noc@iperium.co
remarks:        abuse@iperium.co
remarks:        noc@iperium.co
remarks:        cm@iperium.com.au was validated on 2025-10-20
remarks:        abuse@iperium.com.au is invalid
mnt-by:         MAINT-SIMTRONIC-TECH-AU
last-modified:  2025-11-18T00:26:22Z
source:         APNIC

organisation:   ORG-STPL15-AP
org-name:       Simtronic Technologies Pty Ltd
org-type:       LIR
country:        AU
address:        Level 4
address:        82 Elizabeth Street
phone:          +61247494949
fax-no:         +61247494950
e-mail:         noc@simtronic.com.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:42Z
source:         APNIC

role:           ABUSE SIMTRONICTECHAU
country:        ZZ
address:        Level 7, 82 Elizabeth Street
address:        Sydney NSW 2000
phone:          +000000000
e-mail:         cm@iperium.com.au
admin-c:        STPL2-AP
tech-c:         STPL2-AP
nic-hdl:        AS2290-AP
remarks:        Generated from irt object IRT-SIMTRONIC-TECH-AU
remarks:        cm@iperium.com.au was validated on 2025-10-20
remarks:        abuse@iperium.com.au is invalid
abuse-mailbox:  abuse@iperium.com.au
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-04T22:37:52Z
source:         APNIC

role:           SIMTRONIC TECHNOLOGIES PTY LTD
address:        GPO Box 3280 Syndey NSW 2001
remarks:        Wholesale Service Provider
country:        AU
phone:          +61247494949
fax-no:         +61247494950
e-mail:         abuse@simtronic.com.au
admin-c:        STPL2-AP
tech-c:         STPL2-AP
nic-hdl:        STPL2-AP
mnt-by:         MAINT-SIMTRONIC-TECH-AU
last-modified:  2025-01-21T13:35:21Z
source:         APNIC

% Information related to '103.23.104.0/24AS55707'

route:          103.23.104.0/24
origin:         AS55707
descr:          Simtronic Technologies Pty Ltd
                Level 4
                82 Elizabeth Street
mnt-by:         MAINT-SIMTRONIC-TECH-AU
last-modified:  2021-03-27T02:47:51Z
source:         APNIC

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