Atlanta by default seems to be the biggest market that has the fewest signals that reach from one end of the metro to the other (Houston perhaps being close). 92.9, 94.1, 94.9, 95.5, 96.1, 98.5, 99.7, 101.5, and 103.3 fall in to that category. Then there are signals like 97.1, 104.7, 106.7 and 107.5 that are located to the E/NE, then 97.5, 104.1, 105.3, and 107.9 put out more coverage over the SE portion of the market. 96.7, 100.5, 102.5, and 105.7 are more centrally located but are weaker (two being just class A’s) in a massive market.
That being said, a lot of those signals not located in ATL proper are the ones that are doing the best overall - such as 97.1, 104.1, 97.5/107.5, etc. because they hit the areas with the highest concentration of their target audience even if they aren’t hitting the full market with a 60dbu signal.