Who called from 4129457079

Caller ID says: Elizabeth, PA ... 4 calls in 3 days, never a message left.

Called four times in two days and leaves a hangup on the answering machine so all you hear is the dialtone. Very annoying

Two calls within two hours today, from a Caller-ID showing two seven-digit numbers separated by a colon followed by a space, before the second seven-digit number.  No "V," so I don't know if that's a "VOIP--."
They go straight to a dialtone, for the ten seconds after the tone my answering machine gives non-speaking calls.
No Message left either time.