Please configure
When you set up your business's mobile devices on the Spark network, you'll need to set up APN settings. Your IT administrator may need to know the IP ranges used by the Spark network. Find out how to set your mobile devices up now.
(*) The network allocates the device a Private IP address in the 100.64.0.0/10 range which is then remapped (NAT) to a Public IP address from the corresponding IP range listed below.
To set up your mobile devices to send and receive MMS messages using the Spark network. Use the following settings:
To get the IP ranges you can use, find the APN setting you used, and use an IP address from the corresponding list.
Internet or m2m IP ranges
Direct.telecom.co.nz or m2mdirect IP ranges