Area code 787 serves Puerto Rico and was introduced in 1996 to replace area code 809, which previously covered much of the Caribbean. It encompasses all major cities and towns on the island, including San Juan, Ponce, Mayagüez, and Bayamón. In 2001, area code 939 was added as an overlay to accommodate growing demand, especially from the rise in mobile phones and internet services. Ten-digit dialing is required for all calls on the island. The 787 area code is deeply associated with Puerto Rican identity, culture, and business. It continues to be a primary and iconic code for telecommunications throughout Puerto Rico.