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671 Area Code

Area code 671 is in Guam and some of the main locations it covers are Dededo, Yigo, Tamuning, etc. (jump to city list below).

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

The current time for places served by area code 671 is 06:07:13 AM (Chamorro Standard Time Zone).

Reverse phone lookup

Map of area code 671

671 phone number 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

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.
Assignment date. N/A - mostly CO 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

Listed above are most places served by area code 671. When multiple places in a state/province share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
ChST stands for Chamorro Standard Time Zone (currently 06:07:13 AM).

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