Year 671 (DCLXXI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 671 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

The area code 671 is the local telephone area code of the United States territory of Guam. It was created in 1997, replacing Guam's previous country code 671.

Year 671 (DCLXXI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 671 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

The area code 671 is the local telephone area code of the United States territory of Guam. It was created in 1997, replacing Guam's previous country code 671.