What is the area code?

I take it you are not in the US? In the US, all telephone numbers are preceded by a 3 digit area code. Are you sure you are ordering from the correct online store?

1-area code(3 digits)-xxx-xxxx.

Every phone number has 10 digits total and then put a "1" in fron of the 10 if it is a long distance call.

Best of luck.