Is there a way to block all incoming phone calls except in your area code?

I want to block all incoming calls on my iPhone that are not from my area code so that I will not receive any unsolicited calls from out of state, particularly related to my resume. I read that one can block phone calls using a range of phone area code to block by adding them to a blacklist. I was wondering if you could do the opposite, block everything except phone numbers that you "whitelist" in an address range. If iPhone does't allow it, then maybe it exists as a third party option?