Yeah I think so, 1+ the 3 area code numbers. Right now, a better option I recommend downloading 'Mr Number' it's free on the Play Store. Right now it seems to be working.. it already has an updated database of spam numbers, you can choose to warn you of spam calls OR block them automatically. The database is submitted by a community of people.. you can also add your own number to block.
I haven't gotten any spam calls ever since I actually spoke to someone over the phone.. I accepted the call and chose to speak to someone.. it was a lady trying to pretend to be a health insurance agent.. I was pressing her with questions and she quickly hung up.. I guess they finally knew I was on to them so probably they took me out of their system.. I also downloaded 'Call recorder' so next time if there's a spammer, I can have the phone conversation saved and possibly can identify who the person is by their voice and send it to police.