These people call me many times a day ... like 5 or 6.  There is never anyone that answers and they eventually hang up.
When you call the number, it says it is not assigned yet.
These annoying people need to stop or we have to have a way to block their numbers, just like you can do on a cell phone.  Why is home line technology so behind cellular.  I may just get rid of my home phone.

Calls 1-6 times daily. No message, no answer on return call except a recording that I have reached this number. This is a rogue call center that operates on its own rules. Time to start blocking and reporting...

Calls 3 or more times everyday.

Called 3 times this morning. No one at the other end.

Called three times in a row and left no message