this number calls me more than once a day, when i answer (immediately), nobody's there (not even a recording) it never leave a message on my answering machine, and when i call the number back, a recording says the number's not in service.

This number calls constantly with the above-mentioned recording but occasionally he is actually there. It's a'life-alert' type call which offers free (practically forced) delivery of the equipment and then the bills come...