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North American NPAs starting 3

NPACountryTime Difference (GMT)StateState Abbrv.In Service DateComments
301USA-5MarylandMD  
302USA-5DelawareDE  
303USA-7ColoradoCO  
304USA-5West VirginiaWV  
305USA-5 to -6FloridaFL  
306CANADA-6Saskatchewan   
307USA-7WyomingWY  
308USA-6NebraskaNE  
309USA-6IllinoisIL  
310USA-8CaliforniaCA  
312USA-6IllinoisIL  
313USA-5MichiganMI  
314USA-5MissouriMO  
315USA-5New YorkNY  
316USA-6KansasKS  
317USA-5IndianaIN  
318USA-6LouisianaLA  
319USA-6IowaIA  
320USA-6MinnesotaMN17 Mar 1996 
321USA-5 to -6FloridaFL01 Nov 1999 
323USA-8CaliforniaCA13 Jun 1998 
325USA-6 to -7TexasTX05 Apr 2003 
327USA-6ArkansasAR20 Oct 2012 
330USA-5OhioOH09 Mar 1996 
331USA-6IllinoisIL07 Oct 2007 
334USA-6AlabamaAL15 Jan 1995 
336USA-5North CarolinaNC15 Dec 1997 
337USA-6LouisianaLA11 Oct 1999 
339USA-5MassachusettsMA02 May 2001 
340VIRGIN ISLANDS (US)-4  01 Jun 1997 
341USA-8CaliforniaCA Suspended
343CANADA-5Ontario 17 May 2010 
345CAYMAN ISLANDS-5  01 Sep 1996 
347USA-5New YorkNY01 Oct 1999 
351USA-5MassachusettsMA02 May 2001 
352USA-5 to -6FloridaFL03 Dec 1995 
360USA-8WashingtonWA15 Jan 1995 
361USA-6 to -7TexasTX13 Feb 1999 
365CANADA-5Ontario 25 Mar 2013 
369USA-8CaliforniaCA Suspended
380USA-5OhioOH Suspended
385USA-7UtahUT01 Jun 2008 
386USA-5 to -6FloridaFL15 Feb 2001 

See World Zone 1 for explanation of "NPA"

Where shown:

Time Diff. is with respect to GMT (UCT)
Suspended
Pending
Proposed		 indicate the code is not in use: the "In Service Date" has been delayed or not set
In Service is date code becomes (or became) effective.  If no date is shown, code was effective before 1995
 

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Database Updated: 05 Nov 2011

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