In our travels, many people theorize that the dividing line between North and South Jersey is the Old 201 - 609 area code zones. Here is what that map looked like then and what it looks like today:
But what is amazing to us (though probably obvious to some) is how the old area code map matches our last post - New Jersey separated by driving time to Philadelphia or New York City. It seems like Bell Atlantic/ Verizon planned it that way!