TWRA Region 1 covers the following counties:
Benton, Carroll, Chester, Crockett, Decatur, Dyer, Fayette, Gibson, Hardeman, Hardin, Haywood, Henderson, Henry, Houston, Humphreys, Lake, Lauderdale, Madison, McNairy, Obion, Perry, Shelby, Stewart, Tipton, Weakley

TWRA Region 2 covers the following counties:
Bedford, Cannon, Cheatham, Coffee, Davidson, Dickson, Franklin, Giles, Hickman, Lawrence, Lewis, Lincoln, Macon, Marshall, Maury, Montgomery, Moore, Robertson, Rutherford, Smith, Sumner, Trousdale, Wayne, Williamson, Wilson

TWRA Region 3 covers the following counties:
Bledsoe, Bradley, Clay, Cumberland, DeKalb, Fentress, Grundy, Hamilton, Jackson, Marion, McMinn, Meigs, Monroe, Morgan, Overton, Pickett, Polk, Putnam, Rhea, Roane, Sequatchie, Van Buren, Warren, White

TWRA Region 4 covers the following counties:
Anderson, Blount, Campbell, Carter, Claiborne, Cocke, Grainger, Greene, Hamblen, Hancock, Hawkins, Jefferson, Johnson, Knox, Loudon, Scott, Sevier, Sullivan, Unicoi, Union, Washington

All TWRA Talkgroups have possibility for Encryption,