The station is the host of the ZM network, and is owned and operated by New Zealand Media and Entertainment.

[1] ZM made a return to the Auckland market in February 1997 as a local station broadcasting on 91.0 MHz as 91ZM.

This move was made by The Radio Network after purchasing stations in Auckland and the Waikato previously owned by Prospect Media.

In Waikato The Breeze on 89.8 was closed and replaced with a network feed of Auckland's 91ZM branded as 89.8ZM.

Between 2001 and 2014 the ZM breakfast show presented by Polly Gillespie and Grant Kereama was networked from Wellington to a nationwide audience including Auckland.