What does 00 1 mean?

00 1 is the international telephone area code of the United States and Canada, which was founded by the International Telecommunication Union. This prefix is called the international crown code.

International telephone area code, that is, the code assigned to countries by the International Telecommunication Union according to the E. 164 standard. All numbers are prefix numbers, which means that these numbers are used to "dial" the destination country. Each country also has a prefix "set aside" for its own country. This prefix is called the international crown code.

The general order of making international calls is: international crown code-international telephone area code-domestic telephone area code-open telephone number; International crown code-international telephone area code-closed telephone number.

The United States of America (English: United States) is a federal constitutional country, which consists of Washington, D.C., 50 states, Guam and many other overseas territories. Its main part is located in central North America. The first edition of the CIA's "World Survey" was from 1989 to 1996. The United States has a total area of 9.373 million square kilometers and a population of 333 million. It is an immigrant country with a common English.