described by the standard, <+> is the international prefix symbol, should precede the country code, and serves to identify the number following as the international telephone number.

Example formats

Telephone number

In the international telephone number notation, the leading plus (+) serves as an international prefix symbol, and is immediately followed by the country code. The user or the telephone system should replace the + symbol with international dialing prefix used in the caller's location.

Parentheses

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