Yeah it was a rather amazing (and perverse) shift. The other day a spammer called me from a number less than 10 off of mine. They must have a bank of numbers they select from based on hamming distance, as I've seen near-permutations of my number as well.

They are usually spoofing the number when they're close to yours. Hoping you'll be curious and pickup.

citation? I belive that this local number spoofing is just a meme that's caught on within the junk calling industry. The people making these calls are already in violation of a pile of laws, but they don't care. Number spoofing was always something that was available to them, but not something they knew how to use effectively until recently. I highly doubt a change in the law changed their behavior that significantly.