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What's the area code for calling the United States?

To call the United States from China, dial the international crown code 00 first; Then dial the country code, and the American country code is1; Then there is the 3-digit area code of the United States, and different areas in the United States have different area codes; Finally dial the phone number. For example, dial 9 17-868 1868, and the domestic dialing sequence is: 00-1-917-6861868.

In short, 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.

International telephone area code, that is, the code assigned to a country or special administrative region 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 or special administrative region. Each country also has a prefix "dial-out" country. This prefix is called the international crown code.

Extended data:

The composition of IDD telephone number is as follows: international prefix of calling country+country code+area code+phone number of the other party.

First dial the international prefix: to dial the international, Hong Kong, Macao and Taiwan regions, you must dial the international prefix 00 first, so that your phone can enter the international telephone exchange network. Then dial the country code: the country code is the code assigned by ITU to countries and regions and consists of one, two or three digits. Dialing this code will put your phone into the telephone network of the country or region you want.

Dial the area code again: the area code is the city code designated by each country. When dialing the area code, do not dial the long-distance prefix "0" again. Then dial the other person's phone. Dial continuously when dialing, don't stop halfway.

Baidu Encyclopedia-International Telephone Area Code