Area code 671 is in Guam and some of its main locations are Dededo, Yigo, Tamuning, etc. (jump to city list below).
Area code 671 has been in service since July 01, 1997.
10:01:34 AM is the current time in area code 671 (Chamorro Standard Time Zone).
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 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 |
| 671-486 | 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 |
| 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 |