600-699
600: Special telecommunications needs in Canada
601: Mississippi (Jackson, Hattiesburg, Meridian, Natchez, Vicksburg, and most of central Mississippi)
- Originally covered all of Mississippi; split to create 228 (1997) and 662 (1999).
- Overlain by 769 in 2005.
602: Arizona: Phoenix
- Originally covered all of Arizona; split to create 520 (1995), 480 and 623 (1999).
603: New Hampshire (all)
604: British Columbia (Greater Vancouver Regional District, Whistler, and remaining portion of 604 not part of overlay complex).
- Originally covered all of British Columbia; split in 1996 to create 250.
- Partly overlain by 778 in 2001; the overlay was extended to all of 604 as well as 250 in 2008.
- 236 will serve as its second overlay area code beginning June 1, 2013.
605: South Dakota (all)
606: Kentucky (Ashland, Pikeville, Hazard, Somerset, London, Corbin, Maysville, and much of eastern Kentucky)
- Created in 1954 by split from 502.
- Split in 2000 to create 859.
607: New York State (Binghamton, Elmira, Cornell, Norwich, Ithaca, and most of south-central New York)
- Created in 1954 from parts of 315 and 716.
608: Wisconsin (Madison, La Crosse, Platteville, Beloit, and most of southwestern Wisconsin)
- Created in 1955 from parts of 414 and 715.
609: New Jersey (Trenton, Atlantic City, Princeton, and most of central & southeastern New Jersey)
- Created in 1958 by split from 201.
- Split in 1999 to create 856.
610: Pennsylvania (Chester, Lehigh Valley, Norristown, Reading; parts of southeastern Pennsylvania)
- Created in 1994 by split from 215.
- Overlain by 484 (1999).
611: Repair service for land-line telephones; customer service for most wireless carriers
612: Minnesota (Minneapolis, Fort Snelling, St. Anthony, and Richfield)
- Split in 1954 to create 507.
- Split to create 320 (1996), 651 (1998), 763 and 952 (2000).
613: Province of Ontario (Ottawa and eastern Ontario)
- Split to create part of 519 (1953)
- Split to create part of 705 (1957)
- Overlain by 343 in 2010.
614: Ohio Columbus and Franklin County
- Split in 1997 to create 740.
615: Tennessee (Nashville, Cookeville, Lebanon, Murfreesboro, Sparta, Smyrna, Springfield, and most of Middle Tennessee)
- Created in 1954 by split from 901.
- Split to create 423 (1995) and 931 (1997).
616: Michigan (Grand Rapids, Greenville, Holland, Ionia, Zeeland, and most of southwestern Michigan)
- Split to create 906 in 1961; 231 in 1999, and 269 in 2002.
617: Massachusetts (Boston, Cambridge, Quincy, Newton, Everett, and the nearby suburbs)
- Split to create 508 (1988) and 781 (1997).
- Overlain by 857 in 2001.
618: Illinois (Carbondale, Alton, Belleville, Cahokia, Centralia, Edwardsville, Marion, Metropolis, Vandalia, and most of southern Illinois)
619: California (southern half of San Diego, California city, and southern and eastern suburbs including Chula Vista, National City, El Cajon, La Mesa, Lemon Grove.
- Created in 1982 by split from 714.
- Split to create 760 (1997) and 858 (1999).
620: Kansas (southern Kansas not including the Wichita Metropolitan Area and Hutchison.)
- Created in 2001 by split from 316.
621–622: not used
623: Arizona (part of Maricopa County, including Glendale, Buckeye, Goodyear, Peoria, Sun City, and the western half of Phoenix)
- Created in 1999 by three-way split from 602 (along with 480).
624–625: not used
626: California (Pasadena, Arcadia, Clermont, Covina, El Monte, La Cañada-Flintridge, La Puente, Monrovia, the San Gabriel Valley, Upland, and West Covina)
- Created in 1997 by split from 818.
627 is assigned for numbering relief to Area code 707 (the northern California coast), but no date has been scheduled for this to go into effect.
628 is assigned for numbering relief to Area code 415 (San Francisco, but no date has been scheduled for this to be implemented.
629: not used
630: Illinois (Aurora, Naperville, Oswego, and other suburbs west of Chicago.
- Created in 1996 by split from 708.
- Overlain by 331 in 2007.
631: New York State (Suffolk County on Long Island)
- Created in 1999 by split from 516.
632–635: not used
636: Missouri (St. Charles, Chesterfield, Union, Troy, and parts of east-central Missouri)
- Created in 1999 by split from 314.
637–638: not used
639: Overlay code assigned for numbering relief to 306 in Saskatchewan, starting May, 2013.
640: not used
641: Iowa (Mason City, Oskaloosa, Creston, Pella, Ottumwa, Britt, Clear Lake, Fairfield, and parts of central Iowa)
- Created in 2000 by split from 515.
642–645: not used
646: New York State (Borough of Manhattan, except for Marble Hill on the mainland of New York)
- Overlain on 212 and 917 in 1999.
- Mnemonic: MHN
647: Province of Ontario
- Overlain on 416 in 2001.
648: not used
649: the Turks and Caicos Islands (all)
- Created in 1997 by split from 809.
650: California (Palo Alto, Redwood City, Menlo Park, Mountain View, San Mateo, Santa Clara, Stanford, South San Francisco)
- Created in 1997 by split from 415.
651: Minnesota (St. Paul, Eagan, Lindstrom, Red Wing, Hastings, Stillwater and part of east-central Minnesota)
- Created in 1998 by split from 612.
652–656: not used
657: California
- Overlain on 714 in 2008.
658: not in current use. Listed for Jamaica, but no date is scheduled for this to go into effect.
659 is assigned for numbering relief to 205 (Alabama) but no date has been scheduled for this to go into effect.
660: Missouri (Sedalia, Kirksville, Maryville, Mexico, Whiteman Air Force Base, and part of north-central Missouri)
- Created in 1997 by split from 816.
661: California (Bakersfield, Lancaster, Palmdale, Edwards Air Force Base, and parts of Kern County, and Los Angeles County.
- Created in 1999 by split from 805.
662: Mississippi (Tupelo, Columbus, Corinth, Greenville, Greenwood, Starkville, and most of northern Mississippi)
- Created in 1999 by split from 601.
663: not used
664: Montserrat (all)
- Created in 1996 by split from 809.
- Mnemonic: MOI
665–666: not used
667 is an overlay code for 410 and 443 (Maryland), going into effect in March 2012.
668: not used
669 is an overlay code for 408 (Calif.) going into effect on November 20, 2012.
670: Northern Mariana Islands: the former country code for this present Commonwealth of the United States that includes Saipan, Tinian, and Rota.)
671: Guam: the former country code for this possession and unorganized territory of the United States that includes Andersen Air Force Base.
672: British Columbia is assigned for numbering relief to 236 (British Columbia) but no date has been scheduled for this to go into effect.
673–677: not used
678: Georgia
- Overlain on 404 and 770 in 1998.
- Overlain by 470 in 2010.
679 is assigned for numbering relief to 313 (Michigan) but no date has been scheduled for this to go into effect.
680: not used
681: West Virginia
- Overlain on 304 in 2009.
682: Texas
- Overlain on 817 in 2000.
683: not used
684: American Samoa (the former country code for this possession and unorganized territory of the United States)
685–688: not used
689 is assigned for numbering relief to Area code 407 (Florida) but no date has been scheduled for this to be implemented.
690–699: Reserved for potential North American Numbering Plan expansion
Read more about this topic: List Of North American Numbering Plan Area Codes