The most populous cities in area code 671 are: Hagatna, Agana Heights, and Santa Rita.
Agana Heights is one of the nineteen villages in the United States territory of Guam. It is located in the hills south of Hagåtña (formerly Agana), in the central part of the island. The United States Naval Hospital is located in this largely residential village.
Santa Rita is a village located on the southwest coast of the United States territory of Guam with hills overlooking Apra Harbor. According to the 2000 census it has a population of 7,500, down from 11,857 in 1990. Santa Rita is the newest village in Guam, having been established after the Second World War.
The 671 area code lies within the Hawaii Daylight Time Zone (or HDT). The current time in Hawaii Daylight Time is 07:24 AM on Feb 06, 2025.