No, they are listed as using the MSWIN system. Forrest County has converted its 800 MHz over to MSWIN. Just as Jones County did, and Lee County will, and DeSoto is, and others. Make sure you correctly program the old analog Forrest County, and Jones County as P25 now, as they converted over to MSWIN.
The MSWIN is primarily an 700 MHz system, but now has 800 MHz sites where Counties/Municipalities are converting their own systems over to be MSWIN sites.