Federal authorities, exasperated with a man they say has been running an illegal radio station via transmitters in Mattapan, Randolph, and Brockton for nearly two decades, want to fine him $597,775 in an attempt to get him to stay off the air.

In a notice of apparent liability for forfeiture, first reported by Inside Radio, the Federal Communications Commission (FCC) reports that its Boston office tracked programming from Jean Harold Marius’s Radio Tele Planet Compas at 89.3 MHz to an address on Walk Hill Street in Mattapan in both June and July of last year, and also followed the same programming to addresses in Randolph and Brockton.

This case is the latest of periodic attempts by the FCC to shutter low-wattage stations that are generally aimed at Boston-area Haitian and African American communities and go online without an FCC license.

In December, Marius, who focuses on religious programming for the local Haitian community, wrote to the FCC to say he had stopped transmitting on the air. On one recent afternoon, a car radio in Roslindale tuned to 89.3 only picked up a Rhode Island NPR station.

Last year, the FCC set a minimum fine of $20,000 for pirate radio operators, but the agency said that Marius was more than deserving of a whopping increase, in part because he’s been warned – and fined – by the commission before.

Marius, who lives in Randolph, has 30 days to appeal the proposed fine.