Called and hung up.

Call comes in but all that is heard is periodic keypad tones.

We have been receiving these calls for the past 2-3 weeks now with the same results once picked up. The number is random or 'anonymous'. If no answer, the calls will keep coming as many as 20 times, over and over. Sometimes different numbers are used in a sequence of calls. They are forged numbers in the caller ID making it very difficult to reject a specific number.

We have been receiving these calls for over a month.  Frontier can't seem to get them stopped.  

My company has been getting these calls for the last three weeks.  It always says "Macon, Ga" with this number but it is completely dead when we answer.  Extremely irritating.

Dead air when we pick up on calls from 478-338-9134