Why the telephone number is unvalid?

Question

I try to call a number like that: 866 632 7654. And than I hear that number is not valid. Why? What do I wrong? Should I put "1" before the number? I call from USA to USA (even from the same state). How to call?

Answer 1

yes...try with a 1 before the number>>>

Answer 2

I would put a 1 in front of the number.  If you are dialing from an office, you may need to hit 9 first to dial out.  If it is just from your home or cell phone, dial with a 1 first

Answer 3

A land line needs the "1" prefix to make the connection.

Cell phones do not require the "1" prefix.