My mother bought a house in a retirement village decades ago. A few years ago she had her land line disconnected. The reason is on weekends she was getting 20 or so scam calls a day. I asked around, and everyone in the village was getting these calls. But if you went a block outside of the village it all stopped. The scammers had identified the range of phone numbers used by land lines in the village, and rang them non-stop, for months on end.