US Area Codes Directory
The North American Numbering Plan (NANP) assigns three-digit Numbering Plan Area (NPA) codes — commonly called area codes — to geographic regions across the United States, Canada, and 22 other countries in the NANP. As of March 2026, the United States has 335 active area codes covering all 50 states, Washington D.C., and U.S. territories. New area codes are added as demand for phone numbers grows, particularly through "overlay" codes that share territory with existing codes.
Area Codes by State — Quick Reference
Use the resources below to look up any area code or find which area code covers a specific city or state:
- AllAreaCodes.com – Codes by State — Comprehensive list of all area codes in each U.S. state with city coverage maps.
- Local Calling Guide – NPA Prefix List — Carrier-level data on number prefixes within each area code.
- North American Numbering Plan Administration (NANPA) — The official administrator of the NANP; searchable area-code assignments and exhaust projections.
- World Atlas – US Area Codes by State — Organized table listing all area codes per state.
Area Codes A–Z: Selected Major Codes
| Area Code | State / Region | Major Cities | Time Zone |
|---|---|---|---|
| 201 | New Jersey | Jersey City, Hackensack | Eastern |
| 202 | Washington, D.C. | Washington D.C. | Eastern |
| 212 | New York | Manhattan (NYC) | Eastern |
| 213 | California | Los Angeles (downtown) | Pacific |
| 214 | Texas | Dallas | Central |
| 305 | Florida | Miami, Keys | Eastern |
| 312 | Illinois | Chicago (downtown) | Central |
| 404 | Georgia | Atlanta | Eastern |
| 415 | California | San Francisco | Pacific |
| 512 | Texas | Austin | Central |
| 617 | Massachusetts | Boston | Eastern |
| 702 | Nevada | Las Vegas | Pacific |
| 713 | Texas | Houston | Central |
| 718 | New York | Bronx, Brooklyn, Queens, Staten Island | Eastern |
| 808 | Hawaii | All of Hawaii | Hawaii-Aleutian |
| 907 | Alaska | All of Alaska | Alaska |
For the complete list of all 335 area codes, use the NANPA or AllAreaCodes.com resources above.
What Is an Overlay Area Code?
When an existing area code runs out of available number combinations, regulators can either split the geographic territory into two codes (geographic split) or add a new code that overlaps the same territory (overlay). Overlays require 10-digit dialing even for local calls within the same area. Major recent overlays include:
- New York City: 212 (Manhattan) overlaid by 646 and 332.
- Los Angeles: 213 overlaid by 323 and 738.
- Miami/South Florida: 305 overlaid by 786 and 645.
- Atlanta: 404 overlaid by 470 and 678.
- Chicago: 312 overlaid by 872 (city) + 773/224/331 (suburbs).
International & Special-Use Codes
- 800 / 833 / 844 / 855 / 866 / 877 / 888: Toll-free numbers.
- 900: Premium-rate lines (caller pays per minute).
- +1 area code: NANP country code for the U.S. and Canada. When dialing internationally to the U.S., use +1 followed by the area code.
- ITU E.164 International Numbering Plan — The global standard for telephone numbering.
Frequently Asked Questions
How many area codes does the U.S. have?
As of March 2026, there are 335 active area codes in the United States. New codes are periodically added by the North American Numbering Plan Administration (NANPA) as phone number demand increases.
Can I tell what state a number is from by its area code?
Yes, for most numbers. However, number portability laws allow people to keep their number when moving to a new state, so a 212 (New York) area code no longer guarantees the caller is in New York. This practice is called "number portability."
What does it mean when a new area code is "overlaid"?
An overlay means a new area code is added to the same geographic region as an existing one, rather than splitting the territory. This preserves existing numbers while creating new ones. Everyone in the region must dial 10 digits (area code + number) even for local calls.
Are area codes in Canada the same as the U.S.?
Canada uses the same NANP numbering system with the same country code (+1). Canadian area codes include 416/647/437 (Toronto), 604/778/236 (Vancouver), 514/438 (Montreal), and 403/587/825 (Calgary).
Page updated: March 2026