Not as standard.

You will need to sign up for a static IP.

https://www.spark.co.nz/help/internet-data/webservices/what-is-a-static-ip-and-how-do-i-get-one/ 

Do you mean a static IP or merely a public IP?

mailmarshall: Sorry should have been clearer - something
that allows me to get to my network from outside. I presume this will be public IP.

You get a public IP still, I have one at least.