% 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 '121.75.0.0 - 121.75.255.255'

% Abuse contact for '121.75.0.0 - 121.75.255.255' is 'hostmaster.nz@vodafone.com'

inetnum:        121.75.0.0 - 121.75.255.255
netname:        VODAFONE-AP
descr:          Vodafone New Zealand
descr:          Private Bag 92161
country:        NZ
admin-c:        NO26-AP
tech-c:         NO26-AP
abuse-c:        AO464-AP
status:         ALLOCATED NON-PORTABLE
remarks:        -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
remarks:        This object can only be updated by Vodafone NZ hostmasters.
remarks:        hostmasters and include your organisation's account
remarks:        To update this object, please contact APNIC
remarks:        name in the subject line.
remarks:        -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
mnt-by:         MAINT-ONENZ-NZ
mnt-irt:        IRT-ONENZ-NZ
last-modified:  2023-03-30T00:07:44Z
source:         APNIC

irt:            IRT-ONENZ-NZ
address:        Smales Farm
address:        74 Taharoto Road Takapuna
address:        Auckland 0622 New Zealand
e-mail:         PlanningandDesign.Networks@vodafone.nz
abuse-mailbox:  hostmaster.nz@vodafone.com
admin-c:        ONZG1-AP
tech-c:         ONZG1-AP
auth:           # Filtered
remarks:        planninganddesign.networks@vodafone.nz was validated on 2023-02-22
mnt-by:         MAINT-ONENZ-NZ
last-modified:  2023-03-29T23:34:44Z
source:         APNIC

role:           ABUSE ONENZNZ
address:        Smales Farm
address:        74 Taharoto Road Takapuna
address:        Auckland 0622 New Zealand
country:        ZZ
phone:          +000000000
e-mail:         PlanningandDesign.Networks@vodafone.nz
admin-c:        ONZG1-AP
tech-c:         ONZG1-AP
nic-hdl:        AO464-AP
remarks:        Generated from irt object IRT-ONENZ-NZ
remarks:        planninganddesign.networks@vodafone.nz was validated on 2023-02-22
abuse-mailbox:  hostmaster.nz@vodafone.com
mnt-by:         APNIC-ABUSE
last-modified:  2023-03-29T05:12:24Z
source:         APNIC

person:         Network Operations
nic-hdl:        NO26-AP
e-mail:         hostmaster@vodafone.co.nz
address:        Smales Farm
address:        74 Taharoto Road
                Takapuna
address:        Auckland 0622
address:        New Zealand
phone:          +64-9-355-2000
fax-no:         +64-9-355-2001
country:        NZ
mnt-by:         MAINT-NZ-VODAFONE-NZ
last-modified:  2017-08-15T22:10:25Z
source:         APNIC

% Information related to '121.75.0.0/16AS9500'

route:          121.75.0.0/16
origin:         AS9500
descr:          One NZ Private Bag 92161 Victoria Street West Auckland 1142 New Zealand
mnt-by:         MAINT-ONENZ-NZ
last-modified:  2024-07-01T02:30:11Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-AU4)