We are the first commercial radio in Castelo do Piauí - Pi. Castelo Fm 103.5 MHZ radio, a Brazilian radio station operating on modulated digital frequency, where the sound reaches further with the best quality, bringing and taking accurate information with impartiality and credibility to our listeners and advertisers.

And now we are online, on our website www.fmcastelo.com.br and through our App you can interact with our announcers and participate in our programming.