foreign phone number prefixes
To dial direct, dial the IDD prefix + country code + number. Note: Calls to Canada, Puerto Rico, Guam, U.S. Virgin Islands, Northern Mariana Islands, and Caribbean countries listed below with an IDD prefix of 1 only require you to dial 1 + area code + number just like you call numbers within the United States. No country, city, or international access codes are required. Customers calling from the United States to a mobile number in Mexico must dial a 1 after the Mexico country code of 52 and before the 10-digit local number.