CTAF:  125.9
UNICOM:  122.7
ATIS:  128.125

WX AWOS-3:  PHONE 770-425-3406
MC COLLUM GROUND:  119.0 [0700-2300]
MC COLLUM TOWER:  125.9 [0700-2300]
ATLANTA APPROACH:  121.0
ATLANTA DEPARTURE:  121.0
CLEARANCE DELIVERY:  119.0
WX ASOS at VPC (14 nm NW):  120.525 (770-606-0375)
WX ASOS at FTY (15 nm S):  PHONE 404-696-5660
WX ASOS at PDK (17 nm SE):  PHONE 770-457-1691
WX AWOS-3 at 47A (20 nm NE):  119.825 (770-704-6235)

WHEN ATCT CLSD USE 121.0 AT ATLANTA LARGE TRACON FOR CLEARANCE DELIVERY.