The territory covered by the 530 area code will soon be sharing it with a new 837 area code. Rather than split the zone, as occurred in the 1990s when a large part of the 916 area became 530, the new plan will be an overlay. That means the same area using 530 will also be occupied by the 837 area code. What it means in practical terms is that we will no longer be able to say a phone number and presume it’s 530. The change will occur next year when all of the seven number combinations become used up.
-Steve Gibson