Free US Area Code Lookup Tool
Enter a US area code to see its city, state, and time zone instantly — or search by location to find the right code for the market you're targeting.
Lookups run on your device against a static NANP reference table. No API calls, no logging, no rate limits. Covers 361+ active US area codes across all 50 states and D.C.
What the lookup shows
Location
The city and state each area code serves.
State & region
The broader geographic footprint the code covers.
Time zone
So you know when it's appropriate to call.
Country
United States (NANP — country code +1).
Reverse search
Find the area code for a chosen city or state.
How to look up an area code in 3 steps
Enter an area code
Type any 3-digit US area code (or choose a state and city).
Search
The tool matches it against the North American Numbering Plan reference table.
See the details
City, state, and time zone in seconds — plus a link to the deep-dive guide when we have one.
Why use an area code lookup
Identify callers
Know where an unknown number is based before you pick up.
Choose a local number
Pick an area code your customers recognize as local.
Plan outreach
Call within the right time zone so you actually connect.
Understand coverage
See which cities and regions each code serves.
How it works
US area codes are assigned under the North American Numbering Plan, each mapped to a geographic region — some regions have several overlaid codes. The tool matches the code against that mapping to return the city, state, and time zone, and works in reverse to suggest the code for a location you choose.
The entire NANP reference table ships with the page. Every lookup is instantaneous and completely private — nothing you type ever leaves the browser. That's why it stays free, with no rate limits or signup.
Who uses it
Businesses
Pick a local area code for a new market.
Sales teams
Time calls to the recipient's zone.
Anyone
Identify where an unknown call originated.
Marketers
Target regions with recognizable local numbers.
Accuracy & good-to-know
Some area codes overlay the same region, and a number's area code reflects where it was issued, not necessarily where the person is now — mobile numbers travel. The reference table covers 300+ active US area codes across all states, and is updated whenever the NANPA adds a new one.
Every US area code, by state
Filter by state, then click any tile to see the full list of active codes. Codes with an in-depth guide link straight through.
Want a local number in that area code? MCM can do that.
Once you've found the right area code, My Country Mobile can issue you a real virtual number in it — so you show up as a familiar local presence and win more answered calls. Set up in minutes, no long-term contract.
Explore more MCM tools & guides
Area code lookup — frequently asked questions.
Is the area code lookup free?expand_more
Yes — look up any US area code for free, no signup.
Can I search by city instead of code?expand_more
Yes — enter a state name, 2-letter state code, or city to find the matching area codes.
Does the area code tell me the caller's exact location?expand_more
It shows the region the code serves, but mobile numbers can travel, so it's the issuing region, not a live location.
What are overlay area codes?expand_more
Multiple area codes assigned to the same geographic region — common in busy areas that ran out of numbers under the original code.
Can I get a number in a specific area code?expand_more
Yes — My Country Mobile offers local virtual numbers in area codes across the US.
Where does the data come from?expand_more
The reference table follows the North American Numbering Plan (NANP), the authoritative body for number assignments in the US, Canada, and other +1 countries.
Ready for a real local US number?
Pick any area code from the lookup above, and MCM can activate a matching virtual line in minutes. No installs, no hardware, no long contracts.