his tells your carrier youre making an international

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Calling Within Canada (Domestic Calls):

Local Calls (within the same Area Code, no overlay): In some smaller, older numbering plan areas without overlay codes, you might still be able to dial just the 7-digit However, this is increasingly rare.
Local Calls (within an Overlay Area): In major cities with overlay area codes (e.g., Toronto's 416, 647, 437), you must dial all 10 digits (Areven if the number shares your own area code. This is dataset the most common practice for all local calls now.
Long-Distance Calls within Canada: For calls to a different area code within Canada, you typically need to dial:
1 + 10-Digit Number (Area Code.
The "1" is a long-distance prefix indicating a call within the NANP.
Cost: While many modern mobile plans include unlimited Canada-wide calling, some older plans or landline services may still incur long-distance charges. Always check your plan details.
Calling to the United States (also part of NANP):

Calling the U.S. from "a phone number in Canada" follows the exact same pattern as Canadian long-distance calls:
1 + U.S. 10-Digit Number (U.S. Area Code +.
Cost: Similar to Canadian long-distance, these calls are often included in unlimited North America calling plans but can incur charges on basic plans.
Calling International Destinations (Outside NANP):

For calls to countries outside the North American Numbering Plan, you'll need three key components:

International Dialing Prefix: T call. In Canada (and the U.S.), this is typically 011.
Country Code: A 1- to 3-digit code unique to each country (e.g., 44 for the UK, 33 for France, 86 for China).
Local Number (City Code + Subscriber Number): The specific phone number in the destination country, often including a city or area code for that country.