The radio personality was asked not to return to Magic Talk and management were reported to be in crisis talks.
Plunket hosts the Magic Afternoons with Sean Plunket weekdays from noon-4pm.
He said he could not comment when contacted by the Herald this morning.
The show was touted by the network as four hours of free speech hotline for no-holds-barred common sense talk that you control.
But it had courted controversy in the past year, earning a stiff rebuke and a fine from the Broadcasting Standards Authority over allegations of racism.
In December, the BSA rebuked MediaWorks after a May 6 Plunket interview with Te Whānau ā Apanui spokesman Louis Rapihana on Covid-19 checkpoints.
The BSA said the interview amplified negative stereotypes about Māori and had the potential to cause widespread harm.
MediaWorks was fined $3000 and ordered Plunket to apologise for his "offensive and harmful" interview with an iwi leader.
At the time, MediaWorks accepted the BSA's decision and apologised.