LGA DEP is 120.4(90 % of the time). I have heard a handoff to 135.9 rarely. I believe those are departures to PHL and Bermuda. But the usual is 120.4. After 120.4 the branchoffs are 124.75--South and Southeast bound(Eastcoast and Florida destintations,120.85 SW AND W Bound deps(ATL,DFW,West coast Florida,STL,CVG,IND,MDW,AND SUCH), 118.175(NW Departures), and 126.8(NE DEP'S eg. BOS)