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You can use the ?+? symbol in place of ?011? if dialing from a cell phone. The ?+? sign is usually the same key as ?0? on a smartphone's keypad. Some countries share a country code. For example, Canada, the United States, some places in the Caribbean, and Guam share ?1? as a country code.

Calling the USA: +1 is the US Country Code.

001, or +1 is the telephone calling code of North America; which includes Canada, the United States and the Caribbean.

Permissible numbers exclude easily recognizable codes N11, used for special services. Using 0 or 1 as the first digit of an area code or central office code is invalid, as is a 9 as the middle digit of an area code; these are trunk prefixes or reserved for North American Numbering Plan expansion.

Know the complete US phone number format with country code The order of the number will be the country exit code ->+1 (US country code) -> area code -> 7-digit local phone number.

Country code +1 is assigned to the United States and Canada because in the 1940s and '50s American Telephone and Telegraph Co. (Bell System) controlled more local phone companies in North America than anyone else, and was a major force in developing international direct dialing as we now know it.

"+" signifies the international dialing prefix, "1" indicates the country code, in this case USA. e.g., some other countries: UK +44; Spain +34.

For example, if a contact in the United States (country code "1") has the area code "408" and phone number "-X", you'd enter +1 408 X.

The USA country code is +1. You will add it to the beginning of any phone number you are dialing that's in the US. When you save your American contacts to your phone, make sure to include this number as part of their phone number!

To call the U.K. from the U.S., just follow these simple dialing directions: First dial 011, the U.S. exit code. Next dial 44, the country code for the U.K. Then the area code (2-5 digits). And finally the phone number (4-8 digits; area code plus phone number equals 10 digits).