What does 001 mean?

001 is the international telephone area code of the United States and Canada. It was created by the International Telecommunications Union. This prefix is ??called the international prefix code.

International telephone area codes are codes assigned to countries by the International Telecommunications Union based on the E.164 standard. All numbers are prefix numbers, which means they are used to "dial" the destination country. Each country also has a prefix to "dial" from the country it is located in. This prefix is ??called the international prefix code.

The general order for making international calls is: international prefix code - international telephone area code - domestic telephone area code - open telephone number; international prefix code - international telephone area code - closed telephone number.

Introduction:

The United States of America (English: The United States of America, United States, referred to as "the United States") is composed of Washington, District of Columbia, 50 states, Guam and many other overseas countries. A federal government and a constitutional state composed of territories.

The main part is located in the center of North America. According to the original version of the CIA's "World Factbook" from 1989 to 1996, the United States has a total area of ??9.373 million square kilometers and a population of 333 million. English is commonly spoken and it is a country of immigrants. .