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I guess that you talking about the phone number prefix. its ussually the first 3 digits of the phone number

for exampls: If you have a phone number in NJ the first 3 digits would be (609)

If you live in a different country, theres always a 3 number digit you would dial in the beginning of a phone number

Hope that will help...

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12y ago

What else can I help you with?