| 500 | Personal Communications Services |
| 501 | Arkansas (Little Rock, Hot Springs and central Arkansas) |
| 502 | Kentucky (Louisville, Frankfort, Shelbyville, Bardstown and north central Kentucky) |
| 503 | Oregon (Portland, Salem, Rainier, St. Helens, Tillamook, Astoria and northwestern Oregon, overlays with 971 except in coastal area) |
| 504 | Louisiana (New Orleans, Metairie, Kenner and surrounding areas) |
| 505 | New Mexico: Albuquerque-Santa Fe metro area and northwestern New Mexico |
| 506 | New Brunswick |
| 507 | Minnesota (Rochester, Mankato, Worthington, Marshall and southern Minnesota) |
| 508 | Massachusetts (Worcester, New Bedford and southeastern Massachusetts, overlays with 774) |
| 509 | Washington (All of eastern Washington, including Spokane, the Tri-Cities, Yakima, Wenatchee, Walla Walla, Pullman, and Ellensburg) |
| 510 | California (Hayward, Berkeley, Alameda, Oakland, Richmond and Fremont areas) |
| 511 | Rarely used, is directed to local police non-emergency services in some communities. Starting to be used as the 5-1-1 service. |
| 512 | Texas (Austin, Lampasas, Bastrop, Milam and Central Texas) |
| 513 | Ohio (Cincinnati, Middletown, Hamilton, Norwood, Lebanon and southwestern Ohio. Planned overlay with 283 is postponed) |
| 514 | Quebec (The entire Island of Montreal, Ile Perrot and Ile Bizard); overlays with 438 as of November 4, 2006 |
| 515 | Iowa (Des Moines, Ames, Fort Dodge, Jefferson, Algona, Indianola and north central Iowa) |
| 516 | New York (Nassau County)-had formerly encompassed Suffolk County as well. |
| 517 | Michigan (Lansing, Jackson, Charlotte, Coldwater, Howell, Deerfield, Addison and south central Michigan) |
| 518 | New York (Plattsburgh, Saranac Lake, Albany and northeastern New York) |
| 519 | Ontario (London, Windsor, Kitchener-Waterloo and most of southwestern Ontario; overlays with Area code 226) |
| 520 | Arizona (Tucson and southeastern Arizona) |
| 530 | California (Alturas, Chico, Davis, Redding, Placerville, Truckee and northeastern California) |
| 541 | Oregon (Medford, Eugene, Bend, Ontario, Burns and all of Oregon except northwestern Oregon) |
| 543 | Ontario (North Dundas County area) |
| 551 | New Jersey (Northern New Jersey, Bergen and Hudson counties) |
| 555 | Reserved for directory assistance applications. |
| 557 | Missouri Overlay of Area code 314 |
| 559 | California (Fresno, Madera, Hanford, Visalia, Tulare and central California; the middle section of the San Joaquin Valley) |
| 561 | Florida (exactly Palm Beach County: West Palm Beach, Boca Raton, Boynton Beach, Delray Beach, Belle Glade) |
| 562 | California (Long Beach, Lakewood, Bellflower and southeastern Los Angeles suburbs) |
| 563 | Iowa (Decorah, Dubuque, Clinton, Davenport and eastern and northeastern Iowa) |
| 564 | Washington (Western Washington)-planned. |
| 567 | Ohio (Toledo, Mansfield, Lima, Findlay, Bryan, Sandusky and northwestern Ohio, overlays with 419) |
| 570 | Pennsylvania (Scranton, Williamsport, Wilkes-Barre, Nanticoke, Hazleton, Pottsville, Sunbury, Danville, Bloomsburg, Stroudsburg, and northeastern Pennsylvania) |
| 571 | Virginia (Northern Virginia: Alexandria, Arlington, Fairfax, Prince William and eastern Loudoun counties, overlays with 703) |
| 573 | Missouri (Columbia, Jefferson City, Hannibal, Cape Girardeau, Poplar Bluff, Farmington, Park Hills, Lake Ozark and eastern Missouri excluding St. Louis) |
| 574 | Indiana (South Bend, Logansport, Elkhart, Warsaw, Nappanee and north central Indiana) |
| 575 | New Mexico: all areas outside of the Albuquerque-Santa Fe metro area and northwestern New Mexico |
| 580 | Oklahoma (Ponca City, Guymon, Enid, Lawton, Ardmore, Sayre, Elk City, and southern and western Oklahoma) |
| 581 | Quebec (Quebec City, Saguenay, Gaspe Peninsula, Cote-Nord, Chibougamau, St-Georges, overlays with 418) Planned in service date of September 19, 2008. |
| 585 | New York (Rochester, Wellsville, Batavia, and western New York) |
| 586 | Michigan (Warren, Sterling Heights and Macomb County, split from 810) |
| 587 | Alberta (Overlays with 403 and 780-will be in use by September, 2008) |
| 590 | Alberta |
