Yep they're not nearly as prominent as FM's but there are a few out there.
Still at odds on how to enter them in the DB
MID - Mississippi Insurance Department
or
SFM - State Fire Marshall's Office
I'm leaning towards the first since the Fire Marshall's Office is a sub section of the MID website. Plus if any other MID departments ever show up it will be much more simple to manage too.
Mississippi Insurance Department
So I'm thinking:
MID - Missisippi Insurance Department
13600 - MID FM CMN - State Fire Marshall's Common
13602 - MID FM 13602 - State Fire Marshall's 13602
13604 - MID FM 13604 - State Fire Marshall's 13604
13606 - MID FM 13606 - State Fire Marshall's 13606
13608 - MID FM 13608 - State Fire Marshall's 13608