Browse United States Phone Area Codes
Find telephone area codes across all 50 states and territories. Browse by starting digit (2–9) to locate phone prefixes, cities, timezones, and lookup unknown callers.
Browse by Starting Digit
Under the NANP system, all standard US area codes begin with digits 2 through 9.
Major Metropolitan Area Codes
High-volume telephone numbering plans across primary US commercial hubs.
Geographic Mapping
Every area code in our directory is mapped to its primary state jurisdiction, major metropolitan cities, and applicable timezones.
Caller Identification
Verify unknown incoming calls, detect spam prefixes, and connect directly with verified public record search partners.
10-Digit Validation
Seamlessly transition from area code lookup into full 10-digit reverse telephone searches with strict privacy safeguards.
Area Code Directory Frequently Asked Questions
Key questions about North American numbering plans, regional overlays, and phone lookups.
What is the North American Numbering Plan (NANP)?
The North American Numbering Plan (NANP) is the telephone numbering system that governs the United States, Canada, and 18 Caribbean nations. It organizes phone numbers into a standard 10-digit format: a 3-digit area code, a 3-digit central office exchange, and a 4-digit station number.
Why do all US area codes start with digits 2 through 9?
Under NANP technical standards, the digit '0' is reserved for operator assistance and '1' is reserved as the long-distance trunk prefix. Therefore, all valid regional area codes begin with digits 2 through 9.
What are overlay area codes?
When population growth exhausts available 7-digit numbers in a region, telecom regulators introduce an overlay area code. An overlay serves the exact same geographic region as the original area code, requiring callers to dial all 10 digits.
How do I find out what city or state an area code belongs to?
You can browse by starting digit (2–9) in our directory above or enter the 3-digit area code directly to view its assigned state, primary metropolitan cities, and local timezone.
Can an area code tell me if a phone number is a cell phone or landline?
No. Area codes themselves do not distinguish between mobile and wireline phones. However, entering the full 10-digit number into our Reverse Phone lookup queries carrier registries to identify line type (mobile, landline, or VoIP).
Why do people sometimes have out-of-state area codes on their cell phones?
Because of mobile number portability (MNP), individuals who move across state lines frequently keep their original mobile phone number, meaning someone living in Florida might retain a 212 (New York) or 312 (Chicago) area code.
Can scammers fake or spoof an area code?
Yes. Fraudulent callers frequently use 'neighbor spoofing' software to display your local area code and prefix on caller ID, hoping you will answer believing it is a neighbor or local business.
What should I do if I get a missed call from an unfamiliar area code?
Do not call back immediately. Instead, enter the 10-digit number into our Reverse Phone Lookup tool to verify caller identity, carrier network, and spam risk ratings.
Can I use phone directory records for tenant screening or hiring?
No. Under the Fair Credit Reporting Act (15 U.S.C. § 1681), phone records cannot be used as consumer reports for employment, housing tenancy, or credit eligibility determinations.
How can I remove my phone number from public area code directories?
You can request personal data suppression by submitting an opt-out directly through Spokeo's removal page (spokeo.com/optout) or consulting our Opt-Out guide.
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