This caller needs to be reported to the FCC. I receive at least 6 calls a day with no messages. I called the number back to tell them to leave me alone, but it just rings about 15 times until finally a voicemail prompt states that "this extension is on the other line". Disconnects.

Calls about four times daily over several weeks

This number has called 5 to 6 times a day for several days now.  My caller ID does not give a name.  I cannot recall what happens on answering, but I have now call blocked the number.

Has called numerous times in the last month; never leaves a message. If I pick up, the lines stays open for a few seconds, but nothing is said; extremely irritating.

The latest call came in 01/30 at 2:33P CST. The calls started on our landline 01/19/17, Caller ID showed "Unknown Caller" and they didn't leave a voice mail message. Our Call Blocker unit has had the number in the "Blacklist" since 01/20 so the phone never rings but the number shows up in the incoming call list. They call at least once a day almost every day. Since we live in the same local NPA (Area Code) as the caller, the "Unknown Name" Caller Name ID was immediately suspicious so we blocked it the 2nd time they called on the 20th but still left no voicemail.