Nebo was a ridge or top of the mountains of Abarim. See Poole on "Numbers 27:12"; See Poole on "Deuteronomy 3:27".
Related Commentaries of Deuteronomy 32:49
Deuteronomy 32:49
49 Get thee up into this mountain Abarim, unto mount Nebo, which is in the land of Moab, that is over against Jericho; and behold the land of Canaan, which I give unto the children of Israel for a possession: