This caller is pathological sociopath. This caller repeatedly uses a caller ID (Buffalo NY) that closely resembles the number he/they are attempting to get the victim to answer the call. The last four digits change constantly because the scammer is attempting to appear local and familiar. Here are examples of the last four number changes: 8183, 4047, 8376, 6505, 3971, 3567, 6518, 0511. It is persistent, predictable and committed to attempted fraud. Note also that these numbers are NOT listed in USA business directories.