Who I have the same questioned this topic

I changed my iphone area code from 201 to 772 recently.  I thought I would be able to dial local 772 area numbers without adding that prefix but any time I've tried it I get the error message from Verizon.  Other people I know can call from their cell phones without using the area code first.  Is this a Verizon issue or  something in the iphone settings?  Thank you.