> You can't reach any of the area codes you mentioned by dialing a number starting with the area code, because you have to start with 1, the US country code. Y

> You can't reach any of the area codes you mentioned by dialing a number starting with the area code, because you have to start with 1, the US country code. You absolutely can. 443, and 445 allow for 10 digit dialing. 442 requires a 1 prefix. https://nationalnanpa.com/enas/npasRequiring10DigitReport.do https://nationalnanpa.com/enas/npasRequiring10DigitReport.do In the USA you need to dial 011 (the exit code) before dialing a country code. You can't just pickup the phone and dial any countries country code and expect it to work. If you're on a phone system that supports it, you can dial +[country code] where the phone system will translate + into your countries exit code. > Outside the US, you can use the more unambiguous country code 001 to reach the US. (e.g. I had difficulty calling the US from China because normal American 11-digit numbers starting with 1 are processed by Chinese carriers as 11-digit Chinese cell phone numbers. But there, like here, there was no "international call prefix". You just start right off with the country code.) Only in countries where the exit code is 00. The Country Code for the USA is 1, so in a country where the exit code is 00 that would translate to 001. In Hong Kong, the exit code is 001, so if you wanted to reach the US you would dial 001 1 then the US area code and number.