Area Code Finder
Look up any US area code, or list every code in a state — offline, instant
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State
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Codes in That State
| State | Area codes |
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Look up any US area code, or list every code in a state — offline, instant
| State | Area codes |
|---|
Area codes stopped being geography lessons in 2003: number portability means a 212 can answer from Texas and a 907 from Miami, and the overlay era means one city block can hold four codes. What the three digits still reliably tell you is where the number was issued — useful for screening calls, addressing regions, and decoding the family phone plan. This finder works both directions across the full US geographic dataset, offline and instantly.
| Codes | What they are |
|---|---|
| 800, 833, 844, 855, 866, 877, 888 | Toll-free — the callee pays; legitimate businesses and scammers alike |
| 900 | Premium rate — caller pays steeply; nearly extinct, still valid |
| 809, 876, 868, 784… | Caribbean NANP members — international billing behind a domestic-looking number |
| N11 (211, 311, 511, 711, 811, 911, 988) | Service shortcodes — community info through emergencies, plus 988 for the crisis line |
| 555-01xx | Reserved for fiction — every movie phone number lives here |
An unknown call "from" your own area code and prefix is statistically likelier spoofed than local; Caribbean codes you don't recognize deserve a search before a callback; and no caller-ID region ever authenticates a caller — the IRS-is-calling scam works precisely because a DC area code looks official. The code is a hint, never an ID.
Overlays: when a code's 7.9 million possible numbers run out, a new code is layered onto the SAME territory rather than splitting the map. Manhattan stacks 212/646/332 (plus 917 citywide); Chicago's core runs 312/872. The trade: nobody renumbers, everybody dials ten digits.
No — since 2003, mobile numbers are portable for life, so the code marks where the number was ISSUED (often years ago, often a move ago). Roughly a third of Americans carry a number from somewhere they no longer live. Treat it as a hometown hint, not a location.
Toll-free range expansion — same species as 800. Legitimate businesses use them heavily, and so do robocallers precisely because they look corporate. The number range says nothing about legitimacy; unknown toll-free callers earn voicemail.
Answering is harmless — CALLING BACK is the trap: those are Dominican Republic and Jamaica inside the +1 plan, and callback scams bait a return call to premium-billed numbers. Any unfamiliar +1 code you can't place: look it up (here) before redialing.
You just do — portability is automatic for mobiles; nothing to file. The trade-offs: local businesses see an out-of-state code, and some services (banks' fraud models, delivery apps) occasionally squint at mismatches. Porting to a NEW local number costs the old one forever.
Either an overlay arrived, or the 988 crisis-line rollout: every area code containing a 988 prefix had to drop 7-digit dialing so 988 could route. Ten digits is effectively the national standard now — program contacts accordingly.
Yes — the dataset is embedded in the page; lookups never leave your browser.
Three digits, one issuance record, zero authentication — read area codes as history, not location, and let the unfamiliar ones go to voicemail. The table above is the whole map; the caution is the manual.