How to call vietnam<br>Dial your country's exit code. When you want to call someone in vietnam and you're in a different country, the first thing you'll need to do is dial your country's exit code in order to get the call out of your country. These vary from country to country but many are 0-0 or 0-1-1.

Based on the paragraph above can we conclude that "The exit code to dial from the US is 0-1-1."?
It's impossible to say