When he's able to eat snacks, try winging him off with cheese puffs or something of that nature. He could still suck on them, but I'm sure when he starts growing teeth he'd wanna chew more than anything.
If your son is only a month old, leave him the pacifier. It isn't hurting anything at this point. Don't start planning to take it from him because of what might happen in 11 months or 23 months. He's just a tiny baby, still in his "fourth trimester" as they call it. Let him have the paci.
Honestly, having a pacifier until 1 or 2 is not so bad. Sucking soothes babies, and it is really good for them. Some recent research even shows that a pacifier reduces the risk of SIDS.