In terms of “meanings”, for people living here “212” is a prime number since it is associated with Manhattan and business. To have a “212” here meant that “you made it”. “718” is more like the “second class, bridge and tunnel” person….you’re in NYC but you’re in the outerboroughs. “917” has become a prime cell number now since there are very few of these around. “347” and “646” are still taking some “getting used to” although having a “347” gives a bit of “street cred” being mainly a cell number out in the outer boroughs.