Area Codes in the USA.
Area codes are the first three digits in a 10-digit North American telephone number. They direct calls to the correct geographic region. They also help carriers manage numbering resources and avoid conflicts.
How Many Area Codes Are There?
The United States has roughly 335 active area codes as of 2025. New codes appear each year as existing blocks fill up. Retired codes are rare but do occur when regions merge or expand.
History of Area Codes
The North American Numbering Plan launched in 1947. The original list held 86 codes. Early phones used rotary dials, so numbers with low “finger travel” were assigned to high-population states like New York (212) and California (213). Demand grew with fax machines in the 1980s, pagers in the 1990s, and mobile and VoIP lines after 2000. Splits divided large regions. Overlays stacked new codes on top of old ones to keep numbers in service while adding capacity.
Most Common or Recognized Area Codes
- 212 – Manhattan, NY
- 213 – Downtown Los Angeles, CA
- 305 – Miami, FL
- 310 – West Los Angeles, CA
- 702 – Las Vegas, NV
- 202 – Washington, DC
These codes are famous due to population density, business hubs, entertainment ties, or pop-culture mentions.
Detailed Look at Selected Area Codes
213 Area Code
Serves downtown Los Angeles and surrounding neighborhoods. One of California’s originals from 1947. Overlaid by 323 in 1998. Both codes now share the same footprint, so ten-digit dialing is required.
646 Area Code
An overlay for Manhattan. Introduced in 1999 when 212 numbers ran out. Popular with startups and mobile lines seeking a New York identity.
347 Area Code
Covers the Bronx, Brooklyn, Queens, and Staten Island along with 718 and 929. Launched in 1999 as the first overlay to 718. Often assigned to wireless devices.
917 Area Code
Created in 1992 for New York City wireless and pagers. Now used for any service in all five boroughs. Considered prestigious as early cellular adopters held 917 numbers.
929 Area Code
Added in 2011 as a second overlay for NYC’s outer boroughs. Allows new numbers without forcing existing customers to change.
323 Area Code
Overlay to 213 in central Los Angeles. Includes Hollywood, Echo Park, and East LA. Initially a split in 1998, converted to an overlay complex in 2017.
626 Area Code
Serves the San Gabriel Valley and eastern Los Angeles County. Split from 818 in 1997. Introduced ten-digit dialing in 2021 to accommodate the national 988 lifeline code.
424 Area Code
Overlay to 310 in coastal and South Bay Los Angeles. Activated in 2006. Covers Santa Monica, Beverly Hills, and the LAX corridor when 310 is exhausted.
786 Area Code
Overlay to 305 in Miami-Dade County. Implemented in 1998. Handles Miami, Miami Beach, and Hialeah numbers as the metro area grows.
415 Area Code
One of California’s original codes. Now limited to San Francisco and Marin County after multiple splits. Shares an overlay with 628 since 2015 to prevent exhaustion.
310 Area Code
Created in 1991 from a 213 split. Serves Los Angeles’s Westside, South Bay, and parts of Malibu. Overlay 424 later added to keep pace with demand.
206 Area Code
Original 1947 code for Washington State. Now restricted to Seattle and some nearby islands. Will be overlaid by 564 in 2025 because available numbers are nearly gone.
Frequently Asked Questions
What is the difference between a split and an overlay?
A split divides one region into two. Customers in the new region get a new code. An overlay adds a new code to the same geographic area, so everyone keeps their old number but must dial ten digits for local calls.
Why do major cities have so many area codes?
High population, business growth, and multiple devices per person exhaust available numbers faster. Overlays stack new codes rather than forcing changes to existing ones.
Are area codes tied to state borders?
Generally yes, but a few codes cross borders in lightly populated areas. Numbering authorities prefer clean state boundaries but leave room for exceptions.
Can I keep my area code if I move?
Yes. Mobile number portability lets you keep the same ten-digit number anywhere in the United States.
Do area codes affect call costs?
Within the U.S., most plans include nationwide calling. Long-distance surcharges are rare on modern mobile or VoIP services.
Who assigns new area codes?
The North American Numbering Plan Administrator (NANPA) works with state regulators and telecom providers. They study exhaust forecasts and approve relief plans about 30 months before numbers run out.
What is ten-digit dialing?
Dialing the area code plus the seven-digit local number on every call. It becomes mandatory wherever an overlay exists to avoid conflicts between overlapping codes.
How many new area codes appear each year?
The United States adds roughly five to ten new codes annually, depending on regional growth and device demand.
Why are codes like 212 or 415 considered status symbols?
They are among the oldest codes and link directly with major cities. Limited availability makes them scarce and desirable.
What happens when an area code reaches exhaustion?
NANPA issues a relief order. Regulators either split the region, overlay a new code, or use numbering conservation measures such as thousand-block pooling.
US Area Codes List.
201 Area Code is Jersey City, New Jersey (NJ)
202 Area Code is District of Columbia (DC)
203 Area Code is Bridgeport, Connecticut (CT)
204 Area Code is Manitoba (MB)
205 Area Code is Birmingham, Alabama (AL)
206 Area Code is Seattle, Washington (WA)
207 Area Code is Portland, Maine (ME)
208 Area Code is Idaho (ID)
209 Area Code is Stockton, California (CA)
210 Area Code is San Antonio, Texas (TX)
211 Area Code is N11
212 Area Code is New York, New York (NY)
213 Area Code is Los Angeles, California (CA)
214 Area Code is Dallas, Texas (TX)
215 Area Code is Philadelphia, Pennsylvania (PA)
216 Area Code is Cleveland, Ohio (OH)
217 Area Code is Springfield, Illinois (IL)
218 Area Code is Duluth, Minnesota (MN)
219 Area Code is Hammond, Indiana (IN)
220 Area Code is Newark, Ohio (OH)
223 Area Code is Lancaster, Pennsylvania (PA)
224 Area Code is Elgin, Illinois (IL)
225 Area Code is Baton Rouge, Louisiana (LA)
226 Area Code is London, Ontario (ON)
227 Area Code is Germantown, Maryland (MD)
228 Area Code is Gulfport, Mississippi (MS)
229 Area Code is Albany, Georgia (GA)
231 Area Code is Muskegon, Michigan (MI)
234 Area Code is Akron, Ohio (OH)
235 Area Code is Columbia, Missouri (MO)
236 Area Code is Vancouver, British Columbia (BC)
239 Area Code is Cape Coral, Florida (FL)
240 Area Code is Germantown, Maryland (MD)
242 Area Code is Bahamas (BS)
246 Area Code is Barbados (BB)
248 Area Code is Troy, Michigan (MI)
249 Area Code is Sudbury, Ontario (ON)
250 Area Code is Kelowna, British Columbia (BC)
251 Area Code is Mobile, Alabama (AL)
252 Area Code is Greenville, North Carolina (NC)
253 Area Code is Tacoma, Washington (WA)
254 Area Code is Killeen, Texas (TX)
256 Area Code is Huntsville, Alabama (AL)
257 Area Code is Vancouver, British Columbia (BC)
260 Area Code is Fort Wayne, Indiana (IN)
262 Area Code is Kenosha, Wisconsin (WI)
263 Area Code is Montreal, Quebec (QC)
264 Area Code is Anguilla (AI)
267 Area Code is Philadelphia, Pennsylvania (PA)
268 Area Code is Antigua/Barbuda (AG)
269 Area Code is Kalamazoo, Michigan (MI)
270 Area Code is Bowling Green, Kentucky (KY)
272 Area Code is Scranton, Pennsylvania (PA)
274 Area Code is Green Bay, Wisconsin (WI)
276 Area Code is Bristol, Virginia (VA)
279 Area Code is Sacramento, California (CA)
281 Area Code is Houston, Texas (TX)
283 Area Code is Cincinnati, Ohio (OH)
284 Area Code is British Virgin Islands (VG)
289 Area Code is Hamilton, Ontario (ON)
301 Area Code is Germantown, Maryland (MD)
302 Area Code is Delaware (DE)
303 Area Code is Denver, Colorado (CO)
304 Area Code is West Virginia (WV)
305 Area Code is Miami, Florida (FL)
306 Area Code is Saskatchewan (SK)
307 Area Code is Wyoming (WY)
308 Area Code is Grand Island, Nebraska (NE)
309 Area Code is Peoria, Illinois (IL)
310 Area Code is Los Angeles, California (CA)
311 Area Code is N11
312 Area Code is Chicago, Illinois (IL)
313 Area Code is Detroit, Michigan (MI)
314 Area Code is St. Louis, Missouri (MO)
315 Area Code is Syracuse, New York (NY)
316 Area Code is Wichita, Kansas (KS)
317 Area Code is Indianapolis, Indiana (IN)
318 Area Code is Shreveport, Louisiana (LA)
319 Area Code is Cedar Rapids, Iowa (IA)
320 Area Code is St. Cloud, Minnesota (MN)
321 Area Code is Orlando, Florida (FL)
323 Area Code is Los Angeles, California (CA)
324 Area Code is Jacksonville, Florida (FL)
325 Area Code is Abilene, Texas (TX)
326 Area Code is Dayton, Ohio (OH)
327 Area Code is Jonesboro, Arkansas (AR)
329 Area Code is New City, New York (NY)
330 Area Code is Akron, Ohio (OH)
331 Area Code is Aurora, Illinois (IL)
332 Area Code is New York, New York (NY)
334 Area Code is Montgomery, Alabama (AL)
336 Area Code is Greensboro, North Carolina (NC)
337 Area Code is Lafayette, Louisiana (LA)
339 Area Code is Boston, Massachusetts (MA)
340 Area Code is Virgin Islands (VI)
341 Area Code is Oakland, California (CA)
343 Area Code is Ottawa, Ontario (ON)
345 Area Code is Cayman Islands (KY)
346 Area Code is Houston, Texas (TX)
347 Area Code is New York, New York (NY)
350 Area Code is Stockton, California (CA)
351 Area Code is Lowell, Massachusetts (MA)
352 Area Code is Gainesville, Florida (FL)
353 Area Code is Madison, Wisconsin (WI)
354 Area Code is Granby, Quebec (QC)
357 Area Code is Fresno, California (CA)
360 Area Code is Vancouver, Washington (WA)
361 Area Code is Corpus Christi, Texas (TX)
363 Area Code is Hempstead, New York (NY)
364 Area Code is Bowling Green, Kentucky (KY)
365 Area Code is Hamilton, Ontario (ON)
367 Area Code is Quebec, Quebec (QC)
368 Area Code is Calgary, Alberta (AB)
369 Area Code is Santa Rosa, California (CA)
380 Area Code is Columbus, Ohio (OH)
382 Area Code is London, Ontario (ON)
385 Area Code is Salt Lake City, Utah (UT)
386 Area Code is Palm Coast, Florida (FL)
401 Area Code is Providence, Rhode Island (RI)
402 Area Code is Omaha, Nebraska (NE)
403 Area Code is Calgary, Alberta (AB)
404 Area Code is Atlanta, Georgia (GA)
405 Area Code is Oklahoma City, Oklahoma (OK)
406 Area Code is Montana (MT)
407 Area Code is Orlando, Florida (FL)
408 Area Code is San Jose, California (CA)
409 Area Code is Beaumont, Texas (TX)
410 Area Code is Baltimore, Maryland (MD)
411 Area Code is N11
412 Area Code is Pittsburgh, Pennsylvania (PA)
413 Area Code is Springfield, Massachusetts (MA)
414 Area Code is Milwaukee, Wisconsin (WI)
415 Area Code is San Francisco, California (CA)
416 Area Code is Toronto, Ontario (ON)
417 Area Code is Springfield, Missouri (MO)
418 Area Code is Quebec, Quebec (QC)
419 Area Code is Toledo, Ohio (OH)
423 Area Code is Chattanooga, Tennessee (TN)
424 Area Code is Los Angeles, California (CA)
425 Area Code is Bellevue, Washington (WA)
428 Area Code is New Brunswick (NB)
430 Area Code is Tyler, Texas (TX)
431 Area Code is Manitoba (MB)
432 Area Code is Midland, Texas (TX)
434 Area Code is Lynchburg, Virginia (VA)
435 Area Code is St. George, Utah (UT)
436 Area Code is Parma, Ohio (OH)
437 Area Code is Toronto, Ontario (ON)
438 Area Code is Montreal, Quebec (QC)
440 Area Code is Parma, Ohio (OH)
441 Area Code is Bermuda (BM)
442 Area Code is Oceanside, California (CA)
443 Area Code is Baltimore, Maryland (MD)
445 Area Code is Philadelphia, Pennsylvania (PA)
447 Area Code is Springfield, Illinois (IL)
448 Area Code is Tallahassee, Florida (FL)
450 Area Code is Granby, Quebec (QC)
457 Area Code is Shreveport, Louisiana (LA)
458 Area Code is Eugene, Oregon (OR)
463 Area Code is Indianapolis, Indiana (IN)
464 Area Code is Cicero, Illinois (IL)
468 Area Code is Sherbrooke, Quebec (QC)
469 Area Code is Dallas, Texas (TX)
470 Area Code is Atlanta, Georgia (GA)
472 Area Code is Fayetteville, North Carolina (NC)
473 Area Code is Grenada (GD)
474 Area Code is Saskatchewan (SK)
475 Area Code is Bridgeport, Connecticut (CT)
478 Area Code is Macon, Georgia (GA)
479 Area Code is Fort Smith, Arkansas (AR)
480 Area Code is Phoenix, Arizona (AZ)
483 Area Code is Montgomery, Alabama (AL)
484 Area Code is Allentown, Pennsylvania (PA)
500 Area Code is Non-Geographic Services
501 Area Code is Little Rock, Arkansas (AR)
502 Area Code is Louisville, Kentucky (KY)
503 Area Code is Portland, Oregon (OR)
504 Area Code is New Orleans, Louisiana (LA)
505 Area Code is Albuquerque, New Mexico (NM)
506 Area Code is New Brunswick (NB)
507 Area Code is Rochester, Minnesota (MN)
508 Area Code is Worcester, Massachusetts (MA)
509 Area Code is Spokane, Washington (WA)
510 Area Code is Oakland, California (CA)
511 Area Code is N11
512 Area Code is Austin, Texas (TX)
513 Area Code is Cincinnati, Ohio (OH)
514 Area Code is Montreal, Quebec (QC)
515 Area Code is Des Moines, Iowa (IA)
516 Area Code is Hempstead, New York (NY)
517 Area Code is Lansing, Michigan (MI)
518 Area Code is Albany, New York (NY)
519 Area Code is London, Ontario (ON)
520 Area Code is Tucson, Arizona (AZ)
521 Area Code is Non-Geographic Services
522 Area Code is Non-Geographic Services
523 Area Code is Non-Geographic Services
524 Area Code is Non-Geographic Services
525 Area Code is Non-Geographic Services
526 Area Code is Non-Geographic Services
527 Area Code is Non-Geographic Services
528 Area Code is Non-Geographic Services
529 Area Code is Non-Geographic Services
530 Area Code is Redding, California (CA)
531 Area Code is Omaha, Nebraska (NE)
533 Area Code is Non-Geographic Services
534 Area Code is Eau Claire, Wisconsin (WI)
539 Area Code is Tulsa, Oklahoma (OK)
540 Area Code is Roanoke, Virginia (VA)
541 Area Code is Eugene, Oregon (OR)
544 Area Code is Non-Geographic Services
548 Area Code is London, Ontario (ON)
551 Area Code is Jersey City, New Jersey (NJ)
557 Area Code is St. Louis, Missouri (MO)
559 Area Code is Fresno, California (CA)
561 Area Code is West Palm Beach, Florida (FL)
562 Area Code is Long Beach, California (CA)
563 Area Code is Davenport, Iowa (IA)
564 Area Code is Seattle, Washington (WA)
566 Area Code is Non-Geographic Services
567 Area Code is Toledo, Ohio (OH)
570 Area Code is Scranton, Pennsylvania (PA)
571 Area Code is Arlington, Virginia (VA)
572 Area Code is Oklahoma City, Oklahoma (OK)
573 Area Code is Columbia, Missouri (MO)
574 Area Code is South Bend, Indiana (IN)
575 Area Code is Las Cruces, New Mexico (NM)
577 Area Code is Non-Geographic Services
579 Area Code is Granby, Quebec (QC)
580 Area Code is Lawton, Oklahoma (OK)
581 Area Code is Quebec, Quebec (QC)
582 Area Code is Erie, Pennsylvania (PA)
584 Area Code is Manitoba (MB)
585 Area Code is Rochester, New York (NY)
586 Area Code is Warren, Michigan (MI)
587 Area Code is Calgary, Alberta (AB)
588 Area Code is Non-Geographic Services
600 Area Code is Canadian Non-Geographic Tariffed Services
601 Area Code is Jackson, Mississippi (MS)
602 Area Code is Phoenix, Arizona (AZ)
603 Area Code is New Hampshire (NH)
604 Area Code is Vancouver, British Columbia (BC)
605 Area Code is South Dakota (SD)
606 Area Code is Ashland, Kentucky (KY)
607 Area Code is Binghamton, New York (NY)
608 Area Code is Madison, Wisconsin (WI)
609 Area Code is Trenton, New Jersey (NJ)
610 Area Code is Allentown, Pennsylvania (PA)
611 Area Code is N11
612 Area Code is Minneapolis, Minnesota (MN)
613 Area Code is Ottawa, Ontario (ON)
614 Area Code is Columbus, Ohio (OH)
615 Area Code is Nashville, Tennessee (TN)
616 Area Code is Grand Rapids, Michigan (MI)
617 Area Code is Boston, Massachusetts (MA)
618 Area Code is Belleville, Illinois (IL)
619 Area Code is San Diego, California (CA)
620 Area Code is Hutchinson, Kansas (KS)
621 Area Code is Houston, Texas (TX)
622 Area Code is Canadian Non-Geographic Services
623 Area Code is Phoenix, Arizona (AZ)
624 Area Code is Buffalo, New York (NY)
626 Area Code is Pasadena, California (CA)
628 Area Code is San Francisco, California (CA)
629 Area Code is Nashville, Tennessee (TN)
630 Area Code is Aurora, Illinois (IL)
631 Area Code is Brentwood, New York (NY)
633 Area Code is Canadian Non-Geographic Services
636 Area Code is O’Fallon, Missouri (MO)
639 Area Code is Saskatchewan (SK)
640 Area Code is Trenton, New Jersey (NJ)
641 Area Code is Mason City, Iowa (IA)
645 Area Code is Miami, Florida (FL)
646 Area Code is New York, New York (NY)
647 Area Code is Toronto, Ontario (ON)
649 Area Code is Turks & Caicos Islands (TC)
650 Area Code is San Mateo, California (CA)
651 Area Code is St. Paul, Minnesota (MN)
656 Area Code is Tampa, Florida (FL)
657 Area Code is Anaheim, California (CA)
658 Area Code is Jamaica (JM)
659 Area Code is Birmingham, Alabama (AL)
660 Area Code is Sedalia, Missouri (MO)
661 Area Code is Bakersfield, California (CA)
662 Area Code is Southaven, Mississippi (MS)
664 Area Code is Montserrat (MSR)
667 Area Code is Baltimore, Maryland (MD)
669 Area Code is San Jose, California (CA)
670 Area Code is Northern Mariana Islands (MP)
671 Area Code is Guam (GU)
672 Area Code is Vancouver, British Columbia (BC)
678 Area Code is Atlanta, Georgia (GA)
679 Area Code is Detroit, Michigan (MI)
680 Area Code is Syracuse, New York (NY)
681 Area Code is West Virginia (WV)
682 Area Code is Fort Worth, Texas (TX)
683 Area Code is Sudbury, Ontario (ON)
684 Area Code is American Samoa (AS)
686 Area Code is Richmond, Virginia (VA)
689 Area Code is Orlando, Florida (FL)
700 Area Code is Interexchange Carrier Services
701 Area Code is North Dakota (ND)
702 Area Code is Las Vegas, Nevada (NV)
703 Area Code is Arlington, Virginia (VA)
704 Area Code is Charlotte, North Carolina (NC)
705 Area Code is Sudbury, Ontario (ON)
706 Area Code is Augusta, Georgia (GA)
707 Area Code is Santa Rosa, California (CA)
708 Area Code is Cicero, Illinois (IL)
709 Area Code is Newfoundland/Labrador (NL)
710 Area Code is US Government
711 Area Code is N11
712 Area Code is Sioux City, Iowa (IA)
713 Area Code is Houston, Texas (TX)
714 Area Code is Anaheim, California (CA)
715 Area Code is Eau Claire, Wisconsin (WI)
716 Area Code is Buffalo, New York (NY)
717 Area Code is Lancaster, Pennsylvania (PA)
718 Area Code is New York, New York (NY)
719 Area Code is Colorado Springs, Colorado (CO)
720 Area Code is Denver, Colorado (CO)
721 Area Code is Sint Maarten (SX)
724 Area Code is New Castle, Pennsylvania (PA)
725 Area Code is Las Vegas, Nevada (NV)
726 Area Code is San Antonio, Texas (TX)
727 Area Code is St. Petersburg, Florida (FL)
728 Area Code is West Palm Beach, Florida (FL)
729 Area Code is Chattanooga, Tennessee (TN)
730 Area Code is Belleville, Illinois (IL)
731 Area Code is Jackson, Tennessee (TN)
732 Area Code is Toms River, New Jersey (NJ)
734 Area Code is Ann Arbor, Michigan (MI)
737 Area Code is Austin, Texas (TX)
738 Area Code is Los Angeles, California (CA)
740 Area Code is Newark, Ohio (OH)
742 Area Code is Hamilton, Ontario (ON)
743 Area Code is Greensboro, North Carolina (NC)
747 Area Code is Los Angeles, California (CA)
748 Area Code is Fort Collins, Colorado (CO)
753 Area Code is Ottawa, Ontario (ON)
754 Area Code is Fort Lauderdale, Florida (FL)
757 Area Code is Virginia Beach, Virginia (VA)
758 Area Code is St. Lucia (LC)
760 Area Code is Oceanside, California (CA)
762 Area Code is Augusta, Georgia (GA)
763 Area Code is Brooklyn Park, Minnesota (MN)
765 Area Code is Muncie, Indiana (IN)
767 Area Code is Dominica (DM)
769 Area Code is Jackson, Mississippi (MS)
770 Area Code is Roswell, Georgia (GA)
771 Area Code is District of Columbia (DC)
772 Area Code is Port St. Lucie, Florida (FL)
773 Area Code is Chicago, Illinois (IL)
774 Area Code is Worcester, Massachusetts (MA)
775 Area Code is Reno, Nevada (NV)
778 Area Code is Vancouver, British Columbia (BC)
779 Area Code is Rockford, Illinois (IL)
780 Area Code is Edmonton, Alberta (AB)
781 Area Code is Boston, Massachusetts (MA)
782 Area Code is Nova Scotia/PE Island (NS)
784 Area Code is St. Vincent & Grenadines (VC)
785 Area Code is Topeka, Kansas (KS)
786 Area Code is Miami, Florida (FL)
787 Area Code is Puerto Rico (PR)
800 Area Code is Toll-Free
801 Area Code is Salt Lake City, Utah (UT)
802 Area Code is Vermont (VT)
803 Area Code is Columbia, South Carolina (SC)
804 Area Code is Richmond, Virginia (VA)
805 Area Code is Oxnard, California (CA)
806 Area Code is Lubbock, Texas (TX)
807 Area Code is Kenora, Ontario (ON)
808 Area Code is Hawaii (HI)
809 Area Code is Dominican Republic (DO)
810 Area Code is Flint, Michigan (MI)
811 Area Code is N11
812 Area Code is Evansville, Indiana (IN)
813 Area Code is Tampa, Florida (FL)
814 Area Code is Erie, Pennsylvania (PA)
815 Area Code is Rockford, Illinois (IL)
816 Area Code is Kansas City, Missouri (MO)
817 Area Code is Fort Worth, Texas (TX)
818 Area Code is Los Angeles, California (CA)
819 Area Code is Sherbrooke, Quebec (QC)
820 Area Code is Oxnard, California (CA)
821 Area Code is Greenville, South Carolina (SC)
825 Area Code is Calgary, Alberta (AB)
826 Area Code is Roanoke, Virginia (VA)
828 Area Code is Asheville, North Carolina (NC)
829 Area Code is Dominican Republic (DO)
830 Area Code is New Braunfels, Texas (TX)
831 Area Code is Salinas, California (CA)
832 Area Code is Houston, Texas (TX)
833 Area Code is Toll-Free
835 Area Code is Allentown, Pennsylvania (PA)
837 Area Code is Redding, California (CA)
838 Area Code is Albany, New York (NY)
839 Area Code is Columbia, South Carolina (SC)
840 Area Code is San Bernardino, California (CA)
843 Area Code is Charleston, South Carolina (SC)
844 Area Code is Toll-Free
845 Area Code is New City, New York (NY)
847 Area Code is Elgin, Illinois (IL)
848 Area Code is Toms River, New Jersey (NJ)
849 Area Code is Dominican Republic (DO)
850 Area Code is Tallahassee, Florida (FL)
854 Area Code is Charleston, South Carolina (SC)
855 Area Code is Toll-Free
856 Area Code is Camden, New Jersey (NJ)
857 Area Code is Boston, Massachusetts (MA)
858 Area Code is San Diego, California (CA)
859 Area Code is Lexington-Fayette, Kentucky (KY)
860 Area Code is Hartford, Connecticut (CT)
861 Area Code is Peoria, Illinois (IL)
862 Area Code is Newark, New Jersey (NJ)
863 Area Code is Lakeland, Florida (FL)
864 Area Code is Greenville, South Carolina (SC)
865 Area Code is Knoxville, Tennessee (TN)
866 Area Code is Toll-Free
867 Area Code is Northern Canada (NWT)
868 Area Code is Trinidad & Tobago (TT)
869 Area Code is St. Kitts & Nevis (KN)
870 Area Code is Jonesboro, Arkansas (AR)
872 Area Code is Chicago, Illinois (IL)
873 Area Code is Sherbrooke, Quebec (QC)
876 Area Code is Jamaica (JM)
877 Area Code is Toll-Free
878 Area Code is Pittsburgh, Pennsylvania (PA)
879 Area Code is Newfoundland/Labrador (NL)
888 Area Code is Toll-Free
900 Area Code is Premium Services
901 Area Code is Memphis, Tennessee (TN)
902 Area Code is Nova Scotia/PE Island (NS)
903 Area Code is Tyler, Texas (TX)
904 Area Code is Jacksonville, Florida (FL)
905 Area Code is Hamilton, Ontario (ON)
906 Area Code is Marquette, Michigan (MI)
907 Area Code is Alaska (AK)
908 Area Code is Elizabeth, New Jersey (NJ)
909 Area Code is San Bernardino, California (CA)
910 Area Code is Fayetteville, North Carolina (NC)
911 Area Code is N11
912 Area Code is Savannah, Georgia (GA)
913 Area Code is Overland Park, Kansas (KS)
914 Area Code is Yonkers, New York (NY)
915 Area Code is El Paso, Texas (TX)
916 Area Code is Sacramento, California (CA)
917 Area Code is New York, New York (NY)
918 Area Code is Tulsa, Oklahoma (OK)
919 Area Code is Raleigh, North Carolina (NC)
920 Area Code is Green Bay, Wisconsin (WI)
924 Area Code is Rochester, Minnesota (MN)
925 Area Code is Concord, California (CA)
928 Area Code is Yuma, Arizona (AZ)
929 Area Code is New York, New York (NY)
930 Area Code is Evansville, Indiana (IN)
931 Area Code is Clarksville, Tennessee (TN)
934 Area Code is Brentwood, New York (NY)
936 Area Code is Conroe, Texas (TX)
937 Area Code is Dayton, Ohio (OH)
938 Area Code is Huntsville, Alabama (AL)
939 Area Code is Puerto Rico (PR)
940 Area Code is Denton, Texas (TX)
941 Area Code is North Port, Florida (FL)
942 Area Code is Toronto, Ontario (ON)
943 Area Code is Atlanta, Georgia (GA)
945 Area Code is Dallas, Texas (TX)
947 Area Code is Troy, Michigan (MI)
948 Area Code is Virginia Beach, Virginia (VA)
949 Area Code is Irvine, California (CA)
951 Area Code is Riverside, California (CA)
952 Area Code is Bloomington, Minnesota (MN)
954 Area Code is Fort Lauderdale, Florida (FL)
956 Area Code is Laredo, Texas (TX)
959 Area Code is Hartford, Connecticut (CT)
970 Area Code is Fort Collins, Colorado (CO)
971 Area Code is Portland, Oregon (OR)
972 Area Code is Dallas, Texas (TX)
973 Area Code is Newark, New Jersey (NJ)
975 Area Code is Kansas City, Missouri (MO)
978 Area Code is Lowell, Massachusetts (MA)
979 Area Code is College Station, Texas (TX)
980 Area Code is Charlotte, North Carolina (NC)
983 Area Code is Denver, Colorado (CO)
984 Area Code is Raleigh, North Carolina (NC)
985 Area Code is Houma, Louisiana (LA)
986 Area Code is Idaho (ID)
989 Area Code is Saginaw, Michigan (MI)
Where Are Area Codes Used
Area codes follow the North American Numbering Plan, known as NANP.
The plan includes the United States, Canada, fifteen Caribbean nations, and three Pacific territories.
All NANP numbers share the country code +1, making calls appear “domestic” between members.
Outside NANP, each country creates its own plan. Mexico uses +52, the U.K. +44, Australia +61, and so on.
Because NANP is so large, its 467 codes serve a combined population of roughly 380 million people.
States With the Most Codes
California owns thirty-eight codes. Los Angeles County alone has ten of them.
Texas runs twenty-eight codes, including 210, 214, 254, 281, 346, 512, 713, 817, 830, 915, 936, 940, and 979.
Florida carries twenty-three codes. Its high tourist count drives demand for extra mobile lines.
New York claims twenty-two codes, split between downstate overlays (212, 646, 332, 917) and upstate regions (315, 518, 716).
Illinois lists seventeen codes, with Chicago using four overlays: 312, 773, 872, and 708 for the suburbs.
States with one code include Alaska, Delaware, Hawaii, Maine, Montana, North Dakota, South Dakota, Vermont, Wyoming, West Virginia, and Rhode Island.
Telephone Number Format
Standard format is NPA-NXX-XXXX, sometimes shown as (NPA) NXX-XXXX.
NPA is the 3-digit area code. NXX is the 3-digit prefix. XXXX is the 4-digit line number.
The system can yield 7.9 billion combinations, but many are unusable because of reserved blocks.
NPA – Area Code
The first digit ranges 2–9. Zero and one were not allowed originally to avoid confusion with operators.
Toll-free codes all start with 8. Premium-rate codes start with 9.
Area code 710 is reserved for U.S. government emergency networks and hardly ever appears to the public.
NXX – Prefix or Exchange
Prefixes once issued in 10 000-line chunks. Number pooling now issues many in 1 000-line chunks.
Unused prefixes remain dormant until demand rises. Urban codes such as 212 have almost no idle prefixes left.
Subscriber Number
Four digits equal 10 000 possible lines for each prefix.
Large mobile carriers sometimes burn entire blocks for internal testing or swapped SIM cards.
Assignment of Phone Numbers
NANPA acts as the registry. State public-utility commissions enforce local rules.
Carriers apply for prefixes through a “pooling administrator” run by iconectiv under FCC contract.
Emergency services reserve special prefixes like 911, 988, and 611.
The Original 86 Area Codes of 1947
AT&T assigned ninety-two codes on paper, but only eighty-six went live that year.
Codes with the lowest pulse counts went to high-density corridors to shorten rotary-dial time.
Hawaii joined with area code 808 in 1957, and Alaska 907 in 1957, expanding the map beyond the contiguous U.S.
Growth in Demand
The pager boom in the late 1980s absorbed thousands of numbers per hospital and taxi fleet.
By 1999 the United States had twice as many wireless accounts as landlines.
Fax machines and dial-up modems each required dedicated lines during peak internet growth.
Splits Versus Overlays
Splits forced half a region to change its code. Overlays let everyone keep numbers but require ten-digit dialing.
Public pushback was fierce at first. Businesses disliked reprinting stationery.
By 2000 overlays were preferred because cell-phone memory made ten digits easy.
Number Pooling
Pooling started in Illinois and Colorado pilot projects in 1998 and went nationwide in 2002.
The change saved as many as five million unused numbers in the Chicago market alone.
Canada does not mandate pooling, so its overlay rate remains higher per capita than the U.S. rate.
Modern Usage
Landline prefixes still dominate 68 percent of assignments, but many feed VoIP adapters and PBX trunks, not copper loops.
Wireless prefixes account for about 30 percent, M2M and IoT the rest.
Carrier mergers often strand prefixes that may never reach full capacity.
Dialing Rules Today
Ten-digit dialing is universal anywhere an overlay exists. Seven digits remain only in rural single-code zones.
FCC required every area with the 988 central office to convert to ten digits by October 2021.
Non-Geographic Area Codes
Toll-free block now includes 800, 833, 844, 855, 866, 877, and 888. The unused 822 and 880-889 ranges are held for future toll-free expansion.
Premium 900 traffic has fallen 95 percent since its 1991 peak because of internet billing options.
Area code 500 once hosted “personal mobility numbers.” Few are active today.
700 service codes let corporations route long-distance over private networks; most calls fail if dialed by mistake.
What does the Future Hold for Area Codes in the US?
NANPA projects exhaustion of current three-digit code space beyond 2048 under worst-case demand.
Industry groups have discussed moving to four-digit area codes and keeping seven-digit subscriber numbers, producing 80 billion combinations.
VoIP number-sharing and advanced pooling may delay any drastic expansion plan.
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