B of A, or a company contracted by them, calling to sell some sort of appliance insurance policy.

Called number back - Bank of America - appears to be a telemarketing call

This number has been calling me every day or two (only during the workweek) for the last couple months.  Each time I answer I hear silence, or they hangup.  Obviously a telemarketer who hates his job (but who can blame him?).  I put this number on my blocked number list (thank you CallCentric) and life has been good ever since.

What?

Unknown caller.