I live in Alaska but kept my North Dakota cell phone number because I’ve had it for over 15 years. When I first started receiving the spoofed calls from ND numbers, I answered a couple and there was silence. I answered because they were cell phone numbers and didn’t yet know that spoofing was a thing. I have since received endless spoofed ND numbers and ignore them. Occasionally, I receive robo calls from other places. My husband tried to call one back when I missed one the other day. I told him to hang up as it was most likely spam. I’ve found ignoring them for a while slows them. I only bother to block the numbers that repeatedly call. It’s frustrating and I hope that the Attorney Generals are successful in their endeavor.