Somewhere around ZTL10 (or maybe ZTL19) there is a low frequency of 134.2. KATL Tower hands plans off to the first departure controller (often 125.7 or 125.65) whose airspace is generally from 3,000 to 14,000 MSL. For normal SID departures, the four most common frequencies for commercial aircraft at busy times a day are 133.1 (to the north), 134.95 (to the west), 134.5 (to the south), and 134.2 (to the east). 134.2 seems to be missing from your map. I'm not saying that 123.95 or 124.45 are incorrect (since I can't pick them up), but I can pick up 134.2 from my location and like 133.1, 134.95, and 134.5, I *think* 134.2 generally controls the airspace from 14,000 to FL230 or so.