What is 670 area code?

The 670 area code is not currently assigned to any geographic region. It was previously used for the Northern Mariana Islands, which is a United States commonwealth located in the Pacific Ocean. However, in 2019, the Northern Mariana Islands switched to using the same 670 area code as Guam (which is also a U.S. territory located in the Pacific), and the original 670 code was left unused. It is unclear whether the code will be reassigned to a new region in the future.