How to Identify Where a Phone Call Is Coming From
Getting a call from an unknown number? The area code is your first clue. Here's how to quickly look up where any call originates — and what the area code can and can't tell you.
Start With the Area Code
The three-digit area code at the start of any North American phone number identifies the geographic region where the number was originally assigned. A call from 206 is from Seattle. 212 is Manhattan. 305 is Miami. It's the fastest way to get a geographic read on an unknown caller.
You can look up any area code instantly on this site — just type the three-digit code into the search box on the homepage.
What an Area Code Can Tell You
An area code tells you where a phone number was registered, which usually corresponds to where the account holder lives or does business. For landlines and traditional business numbers, the match is reliable. For cell phones, it's less certain — a person who moved from Boston to Los Angeles years ago may still have a 617 number.
What an Area Code Cannot Tell You
Modern technology has complicated the relationship between area code and location:
- Cell phone portability — people keep their numbers when they move
- VoIP numbers — services like Google Voice let you choose any area code regardless of location
- Spoofing — caller ID can be falsified, so scammers routinely fake area codes to appear local
If you receive a call from an area code you recognize as local, that doesn't guarantee the caller is actually in your area.
Spotting Suspicious Patterns
Certain area codes are associated with higher rates of scam calls, particularly codes in Caribbean nations that are part of the NANP (like 876 Jamaica or 809 Dominican Republic). These can appear to be domestic US calls but may result in unexpected international charges. When in doubt, let unknown calls go to voicemail and look up the area code first.
The Right Tool for the Job
To look up any area code, use the search at the top of this page. You can also browse all area codes by state or view all codes in a specific state. For timezone information, check the timezone pages to see which codes share a time zone.
More Area Code Guides
Area Code 613: Ottawa, Eastern Ontario, and Canada's Capital Region
Area code 613 covers Ottawa and eastern Ontario, serving Canada's capital city and the surrounding region. Here's the history and geography of this important Canadian code.
How to Spot Phone Scams Using Area Codes
Scammers use specific area codes to trick victims into making expensive calls or answering fraudulent claims. Here's what to watch for and how to protect yourself.
Area Code 415: San Francisco Before and After the Split
Area code 415 once served the entire Bay Area. Today it covers just San Francisco. Here's the story of how Silicon Valley's growth transformed the Bay Area's area code map.