Castle FM broadcasts a mixture of music, news and information for a potential audience of over 50,000 adults in the East Antrim area.

A small caravan on the 'Castle Green' at the foot of Carrick's 12th-century Norman Castle gave home to presenters on the first day including Paul Buckle (now BBC NI), Stuart Robinson (now Cool FM /Downtown), Ricky K (now Citybeat), Natasha Sayee (now BBC NI) and Eddie West (now Cool FM / Downtown).

In 2000, the station relocated to a more suitable location at the time in the town's DeCourcy Centre and rebranded to Vibe FM which launched at 9 am on 9 June 2000.

In 2011, it was announced that 'The New Castle FM' would be returning following a six-year break and once again supported by Carrickfergus Borough Council, however David McCammond is now listed as the new licence holder of the service.

On 4 July 2011 at 9 am, Robinson brought 'The New Castle FM' back to life with Starship's "Nothing's Gonna Stop Us Now"; the station enjoyed success over the following two weeks attracting interviews with members of the local community and even Siva from 'The Wanted' called to show his support.