LincMad Telephone Area Codes & Splits

The following chart shows the original 86 Numbering Plan Areas (NPAs, or area codes) assigned in 1947. You can also see the map at map1947.html. Note that in several cases, the boundaries have since been realigned, so that, while many of the area codes are familiar, there are a few surprises. Entries shown in green have not changed (or changed only minutely) in the half century the NANP has existed. The second chart illustrates certain patterns in the initial assignments. A separate page details the evolution from these original area codes to the present day.

Looking for a current list of U.S. & Canada area codes? Go to LincMad's Locator page!

Original Area Code Assignments (1947)

Code State / Prov. Area Covered

201

New Jersey (entire state)

202

Wash. D.C. Washington, D.C., and nearby federal offices in VA/MD

203

Connecticut (entire state)

204

Manitoba (entire province)

205

Alabama (entire state)

206

Washington (entire state)

207

Maine (entire state)

208

Idaho (entire state)

212

New York New York City (all 5 boroughs, but not suburbs)

213

California Los Angeles, San Diego, Santa Barbara (south of Tehachapi Mtns.)

214

Texas northeast (Dallas, Fort Worth, Waco)

215

Pennsylvania Philadelphia and surrounding area

216

Ohio northeast (Cleveland, Akron, Youngstown, Canton)

217

Illinois Springfield, East St. Louis

218

Minnesota northern and western (boundary realigned in 1954)

301

Maryland (entire state)

302

Delaware (entire state)

303

Colorado (entire state)

304

West Virginia (entire state) (304 & 681 overlay)

305

Florida (entire state)

306

Saskatchewan (entire province)

307

Wyoming (entire state)

312

Illinois Chicago and suburbs

313

Michigan Detroit, Jackson (boundary realigned in 1960?)

314

Missouri eastern half (St. Louis) (boundary realigned in 1950)

315

New York Syracuse, Binghamton, Elmira, Utica, Watertown

316

Kansas southern half (Wichita)

317

Indiana northern (Indianapolis, Lafayette, Fort Wayne, Gary, South Bend)

319

Iowa eastern (Cedar Rapids, Davenport/Quad Cities)

401

Rhode Island (entire state)

402

Nebraska (entire state)

403

Alberta (entire province) (Yukon & most of NWT added later)

404

Georgia (entire state)

405

Oklahoma (entire state)

406

Montana (entire state)

412

Pennsylvania Pittsburgh and southwestern area

413

Massachusetts all but metro Boston (boundary realigned in 1960?)

414

Wisconsin southern (Milwaukee, Green Bay, Madison)

415

California central (San Francisco, Sacramento, Bakersfield)

416

Ontario southern peninsula (Toronto, Windsor, London)

418

Québec eastern (Québec ville, Gaspé, Chicoutimi) (418 & 581 overlay)

419

Ohio northwest (Toledo, Lima, Marion?) (419 & 567 overlay)

501

Arkansas (entire state)

502

Kentucky (entire state)

503

Oregon (entire state)

504

Louisiana (entire state)

505

New Mexico (entire state)

512

Texas south (San Antonio, Austin, Corpus Christi, Laredo, Brownsville)

513

Ohio southwest (Cincinnati, Dayton)

514

Québec western (Montréal, Hull, Sherbrooke, Trois-Rivières?)

515

Iowa central (Des Moines, Ft. Dodge, Mason City, Ottumwa)

517

Michigan northeast (Lansing, Flint, Saginaw, Alpena) (realigned 1960?)

518

New York northeast (Albany, Schenectady, east Adirondacks)

601

Mississippi (entire state)

602

Arizona (entire state)

603

New Hampshire (entire state)

604

British Columbia (entire province)

605

South Dakota (entire state)

612

Minnesota southeast (Minneapolis, St. Paul, Rochester, Duluth?)

613

Ontario up-province (Ottawa, Sault Ste. Marie, Thunder Bay)

614

Ohio southeast (Columbus)

616

Michigan western (Grand Rapids, Kalamazoo, upper peninsula)

617

Massachusetts Boston and suburbs (boundary realigned in 1960?)

618

Illinois southern (Cairo, West Frankfort, NOT East St. Louis)

701

North Dakota (entire state)

702

Nevada (entire state)

703

Virginia (entire state)

704

North Carolina (entire state)

712

Iowa western (Sioux City, Council Bluffs)

713

Texas southeast (Houston, Galveston, Beaumont)

715

Wisconsin northern (Superior, Eau Claire, Wausau, La Crosse)

716

New York western (Buffalo, Rochester, Jamestown, Niagara Falls)

717

Pennsylvania east central (Harrisburg, Scranton, Wilkes-Barre, Williamsport)

801

Utah (entire state)

802

Vermont (entire state)

803

South Carolina (entire state)

812

Indiana southern (Evansville, Terre Haute?)

814

Pennsylvania west central (Erie, Altoona, Punxsutawney)

815

Illinois north (Rockford, Kankakee, Moline/Quad Cities)

816

Missouri western half (Kansas City, Springfield, Joplin, St. Joseph)

901

Tennessee (entire state)

902

Maritime Prov's. New Brunswick, Nova Scotia, Prince Edward Island, Nfld?

913

Kansas northern half (Kansas City, Topeka, Salina, Manhattan)

914

New York NYC suburbs (Long Island, Westchester County, West Point)

915

Texas western (El Paso, Amarillo, Abilene, Lubbock, Wichita Falls)

916

California extreme north (Eureka, Redding, NOT Sacramento)


A simple pattern unified the original assignments of area codes in 1947. First, any state or province that had only a single area code (or shared an area code with an adjacent province) was assigned an area code with a 0 as the middle digit. All area codes in multi-code states and provinces were assigned with 1 as the middle digit. Since telephones in that day were rotary dial, consideration was also given to the number of "dial pulls" required for each area code; area codes with a small number of dial pulls were assigned to the largest cities and states. Thus, New York City, Los Angeles, and Chicago got 212, 213, and 312, while New Jersey, Washington DC, Maryland, and Connecticut got 201, 202, 301, and 203. There were some odd exceptions, though: Dallas, western Massachusetts, and Manitoba were all promoted above their importance in 1947, while Boston, Kansas City (both KS and MO), and the suburbs of New York City were demoted.

201 NJ 301 MD 401 RI 501 AR 601 MS 701 ND 801 UT 901 TN
202 DC 302 DE 402 NE 502 KY 602 AZ 702 NV 802 VT 902 **
203 CT 303 CO 403 AB 503 OR 603 NH 703 VA 803 SC  
204 MB 304 WV 404 GA 504 LA 604 BC 704 NC    
205 AL 305 FL 405 OK 505 NM 605 SD      
206 WA 306 SK 406 MT          
207 ME 307 WY            
208 ID              
               

212 NY 312 IL 412 PA 512 TX 612 MN 712 IA 812 IN  
213 CA 313 MI 413 MA 513 OH 613 ON 713 TX   913 KS
214 TX 314 MO 414 WI 514 QC 614 OH   814 PA 914 NY
215 PA 315 NY 415 CA 515 IA   715 WI 815 IL 915 TX
216 OH 316 KS 416 ON   616 MI 716 NY 816 MO 916 CA
217 IL 317 IN   517 MI 617 MA 717 PA    
218 MN   418 QC 518 NY 618 IL      
  319 IA 419 OH          

Note the clear diagonal patterns in both sets of assignments.

** Area code 902 was originally assigned to New Brunswick, Nova Scotia, and Prince Edward Island.


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