Only beeps - like the kind used in conversations being recorded, no one on the other end.

Only beeps.

Since 4am this morning I have gotten not stop fax machine calls from this number. I *69 to find the number 720-386-7638. So seeing how my home line has been tied up all day long I called the number using my cell only to find that it belongs to something called "net pro quo" you can leave a message to have your number removed or you email. Good Luck. They havent called in 20 minutes.

This number called and left 16 messages on my phone where it only beeps.