The internet has no area codes.
"The internet has no area codes." Was the statment made by CIA Director General Hayden.
This is very misleading at best and a lie at worst.
Each piece of information on the Internet is wrapped in what is called an IP packet and each of these packets has 2 addresses associated with it. These addresses are very similar to a phone numbers. One is the address of the person sending the packet and one in the address of the person that will receive the packet. Buy looking at these addresses it is very easy to tell if a message if going to a computer that is in the US.
It is possible that a from address could be spoofed to look like it was coming from a US address when it is not, but this can be fought against and is not different that what can be done with a phone by simply using calling cards that are located in the US.

