Quick Answer

There are 360+ active area codes in the North American Numbering Plan — covering all 50 US states, 7 toll-free prefixes, and codes for Canada. The most searched codes are 212 (Manhattan), 310 (Los Angeles), 312 (Chicago), and 404 (Atlanta). All codes are assigned by NANPA (North American Numbering Plan Administration).

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Browse Area Codes by State

Alabama6 codes Alaska1 code Arizona5 codes Arkansas3 codes California38 codes Colorado4 codes Connecticut4 codes Delaware1 code Florida18 codes Georgia9 codes Hawaii1 code Idaho2 codes Illinois16 codes Indiana8 codes Iowa5 codes Kansas4 codes Kentucky5 codes Louisiana5 codes Maine1 code Maryland5 codes Massachusetts9 codes Michigan12 codes Minnesota7 codes Mississippi4 codes Missouri8 codes Montana1 code Nebraska3 codes Nevada3 codes New Hampshire1 code New Jersey9 codes New Mexico2 codes New York18 codes North Carolina9 codes North Dakota1 code Ohio14 codes Oklahoma4 codes Oregon4 codes Pennsylvania14 codes Rhode Island1 code South Carolina4 codes South Dakota1 code Tennessee7 codes Texas28 codes Utah3 codes Vermont1 code Virginia9 codes Washington6 codes Washington D.C.1 code West Virginia2 codes Wisconsin7 codes Wyoming1 code

Frequently Asked Questions

How many area codes are there in the US?+
There are 360+ active area codes in the North American Numbering Plan — including 338+ geographic US codes, 7 toll-free prefixes (800, 833, 844, 855, 866, 877, 888), and codes for Canada and other NANPA territories. New codes are assigned by NANPA as existing ones fill up.
What state has the most area codes?+
California has the most area codes with 38, followed by Texas (27), New York (19), Florida (18), and Illinois (16). States with high population density need more codes to satisfy demand for phone numbers.
What are the original US area codes?+
The original area codes were established in 1947 by AT&T. They include 201 (NJ), 202 (DC), 203 (CT), 205 (AL), 206 (WA), 207 (ME), 208 (ID), 212 (Manhattan), 213 (LA), 214 (Dallas), 215 (Philadelphia), 216 (Cleveland), 301 (MD), 303 (CO), 305 (FL), 307 (WY), 308 (NE), 309 (IL), 312 (Chicago), 313 (Detroit), 314 (St. Louis), and many more.
What is an overlay area code?+
An overlay area code covers the same geographic region as an existing code. When an area code runs out of available numbers, NANPA assigns a new overlay code to the same area. Both codes serve the same region and 10-digit dialing is required for local calls. Example: 212 and 646 both serve Manhattan.
How are area codes assigned?+
Area codes are assigned by NANPA (North American Numbering Plan Administration). When existing codes run low on available numbers, NANPA either creates an overlay (new code, same geography, requires 10-digit dialing) or a geographic split (region divided into two areas with different codes).