Caller ID came up "Customer Service". No message. Blocked caller #647 (two Panasonics + 20 ATT IDs), idiot call #1360 (not including obvious mis-dials) since 5/2/13. Caller ID "1" (100-000-0000) has called 70 times, including 12 in one day, 6 on another. I also had to block my own scammed number as four times the caller ID indicated that I received a call from IT.
I have received IRS scam call voice messages from four different telephone numbers threatening arrest.
All phone numbers are kept on a spreadsheet with dates and number of calls. Since both blocking systems are full, I have been recycling the older numbers that only called once or twice.
You what I used to do. My spreadsheet is 6 years old. I got a Call Blocker that blocks over 1000 numbers so I don't keep the spreadsheet anymore. Some of the earliest numbers have begun to recycle!