% 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 '121.72.0.0 - 121.72.63.255'

% Abuse contact for '121.72.0.0 - 121.72.63.255' is 'abuse@one.nz'

inetnum:        121.72.0.0 - 121.72.63.255
netname:        ONENZ-AKLDDSL-NZ
descr:          One NZ dynpool
descr:          24/7 One NZ NOC phone +64-9-912-4990
country:        NZ
admin-c:        TAC3-AP
tech-c:         TTC7-AP
abuse-c:        AO464-AP
status:         ASSIGNED NON-PORTABLE
notify:         dg-nz-ipnetworknz@one.nz
mnt-by:         MAINT-ONENZ-NZ
mnt-irt:        IRT-ONENZ-NZ
last-modified:  2025-11-11T22:09:39Z
source:         APNIC

irt:            IRT-ONENZ-NZ
address:        Level 6, Tower B, 30 Daldy Street
address:        Auckalnd Central
address:        Auckland 1010 New Zealand
e-mail:         PlanningandDesign.Networks@one.nz
abuse-mailbox:  abuse@one.nz
admin-c:        ONZG1-AP
tech-c:         ONZG1-AP
auth:           # Filtered
remarks:        planninganddesign.networks@one.nz was validated on 2025-08-08
remarks:        abuse@one.nz was validated on 2025-08-08
mnt-by:         MAINT-ONENZ-NZ
last-modified:  2025-12-19T01:07:13Z
source:         APNIC

role:           ABUSE ONENZNZ
country:        ZZ
address:        Level 6, Tower B, 30 Daldy Street
address:        Auckalnd Central
address:        Auckland 1010 New Zealand
phone:          +000000000
e-mail:         PlanningandDesign.Networks@one.nz
admin-c:        ONZG1-AP
tech-c:         ONZG1-AP
nic-hdl:        AO464-AP
remarks:        Generated from irt object IRT-ONENZ-NZ
remarks:        planninganddesign.networks@one.nz was validated on 2025-08-08
remarks:        abuse@one.nz was validated on 2025-08-08
abuse-mailbox:  abuse@one.nz
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-11T00:30:59Z
source:         APNIC

role:           TelstraClear Administrative Contact
address:        TelstraClear Limited
address:        Network Planning
address:        Private Bag 92143
address:        Auckland
country:        NZ
e-mail:         apnic.changes@team.telstraclear.co.nz
phone:          +64 9 912 5205
remarks:        For network abuse contact:
remarks:        abuse.nz@vodafone.com
remarks:        +64 9 912 5161
remarks:        For 24/7 after-hours NOC contact:
remarks:        +64 9 912 4482
notify:         apnic.changes@team.telstraclear.co.nz
tech-c:         TTC7-AP
admin-c:        TAC3-AP
nic-hdl:        TAC3-AP
mnt-by:         MAINT-NZ-TELSTRACLEAR
last-modified:  2017-08-20T22:47:05Z
source:         APNIC

role:           TelstraClear Technical Contact
address:        TelstraClear Limited
address:        Customer Help
address:        Private Bag 92143
address:        Auckland
country:        NZ
e-mail:         list.admin@team.telstraclear.co.nz
phone:          +64 9 912 5161
remarks:        For network abuse contact:
remarks:        abuse.nz@vodafone.com
remarks:        +64 9 912 5161
remarks:        For 24/7 after-hours NOC contact:
remarks:        +64 9 912 4482
notify:         apnic.changes@team.telstraclear.co.nz
tech-c:         TTC7-AP
admin-c:        TAC3-AP
nic-hdl:        TTC7-AP
mnt-by:         MAINT-NZ-TELSTRACLEAR
last-modified:  2017-08-20T22:46:38Z
source:         APNIC

% Information related to '121.72.0.0/15AS4768'

route:          121.72.0.0/15
origin:         AS4768
descr:          One NZ Private Bag 92161 Auckland 1030 New Zealand
mnt-by:         MAINT-ONENZ-NZ
last-modified:  2024-06-30T22:20:55Z
source:         APNIC

% Information related to '121.72.0.0/15AS9500'

route:          121.72.0.0/15
origin:         AS9500
descr:          One NZ Private Bag 92161 Auckland 1030 New Zealand
mnt-by:         MAINT-ONENZ-NZ
last-modified:  2024-06-30T22:21:54Z
source:         APNIC

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