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Area Code 671

Area code 671 is in Guam, serving 19 cities, including Dededo, Yigo or Tamuning; it currently uses 90 prefixes, assigned from 671-201-XXXX through 671-998-XXXX.

In service date for area code 671: July 01, 1997.

The current local time is 07:57:32 AM (Chamorro Standard Time Zone).

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Map of area code 671

671 area code prefix location

NPANXX Area served1 Date2
671-201 Agana 06/02/2023
671-300 Agana 3/23/2007
671-333 Agana N/A
671-339 Agana N/A
671-343 Agana N/A
671-344 Agana N/A
671-349 Agana N/A
671-355 Agana N/A
671-362 Agana N/A
671-366 Agana N/A
671-400 Agana 11/4/2010
671-456 Agana N/A
671-471 Agana N/A
671-472 Agana N/A
671-473 Agana N/A
671-474 Agana N/A
671-475 Agana N/A
671-477 Agana N/A
671-478 Agana N/A
671-479 Agana N/A
671-480 Agana 3/13/2015
671-482 Agana N/A
671-483 Agana N/A
671-484 Agana 2/18/2022
671-485 Agana 07/18/2023
671-486 Agana N/A
671-487 Agana 5/7/2009
671-488 Agana 3/28/2002
671-489 Agana 9/7/2011
671-562 Agana N/A
671-563 Agana N/A
671-564 Agana N/A
671-565 Agana N/A
671-588 Agana 5/7/2009
671-632 Agana N/A
671-633 Agana N/A
671-634 Agana N/A
671-635 Agana N/A
671-637 Agana N/A
671-638 Agana N/A
671-642 Agana N/A
671-644 Agana N/A
671-645 Agana N/A
671-646 Agana N/A
671-647 Agana N/A
671-648 Agana N/A
671-649 Agana N/A
671-653 Agana N/A
671-654 Agana N/A
671-678 Agana 5/17/2002
671-682 Agana 2/19/2016
671-683 Agana 2/26/2016
671-685 Agana 11/5/2009
671-686 Agana 11/20/2001
671-687 Agana N/A
671-688 Agana N/A
671-689 Agana N/A
671-707 Agana 3/26/2009
671-726 Agana N/A
671-727 Agana N/A
671-734 Agana N/A
671-735 Agana N/A
671-747 Agana 2/23/2012
671-777 Agana 5/8/2001
671-787 Agana 6/13/2002
671-788 Agana N/A
671-789 Agana N/A
671-797 Agana 4/8/2009
671-828 Agana N/A
671-838 Agana 8/25/2004
671-848 Agana 10/10/2008
671-858 Agana 10/10/2008
671-864 Agana N/A
671-868 Agana 3/10/2003
671-878 Agana 1/13/2005
671-888 Agana N/A
671-898 Agana 8/24/2004
671-922 Agana 2/25/2003
671-929 Agana 4/9/2008
671-967 Agana 8/28/2009
671-969 Agana 1/8/2007
671-971 Agana 2/9/2011
671-972 Agana 2/10/2012
671-977 Agana 8/28/2009
671-979 Agana 9/3/2009
671-987 Agana 7/22/2005
671-988 Agana 3/4/2003
671-989 Agana 2/3/2010
671-997 Agana 3/30/2010
671-998 Agana 3/30/2010
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date. N/A - mostly central office codes assigned before 2001.
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Cities in area code 671

City1 Time2
Agana Heights ChST
Agat ChST
Asan ChST
Barrigada ChST
Chalan Pago-Ordot ChST
Dededo ChST
Hagatna ChST
Inarajan ChST
Mangilao ChST
Merizo ChST
Mongmong-Toto-Maite ChST
Piti ChST
Santa Rita ChST
Sinajana ChST
Talofofo ChST
Tamuning ChST
Umatac ChST
Yigo ChST
Yona ChST
  1. Listed above are most places served by Guam area code 671. When multiple places share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. ChST stands for Chamorro Standard Time Zone (currently 07:57:32 AM).
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