Area Code Lookup

Area code, phone number, or place:

Examples: 415, (212) 555-0199, San Francisco, CA, Ontario, 800.

Search scope:

Use current codes for caller context; switch to all records when checking whether a code is reserved, planned, or unused.

Country or service filter:

Keep all NANP for general triage, or narrow the ledger before exporting.

Ledger sort:

Choose how the match ledger is ordered after filtering.

Ledger limit:

Raise the limit when exporting a state, province, country, or time-zone slice.

rows

Reference city aliases:

Turn off to search only official NANPA fields such as code, location, country, service, overlay complex, and dialing notes.

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No approximate coordinates are available for this match set.

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Area codes are numbering-plan assignments, not reliable proof of where a caller is.

The North American Numbering Plan, or NANP, places many countries and territories under country code +1. A normal NANP telephone number is built from a three-digit Numbering Plan Area, a three-digit exchange, and a four-digit line number. The area code is the first domestic clue, so it is useful for recognizing broad geography, non-geographic service ranges, overlays, time-zone hints, and numbering-plan status.

That clue has real practical value. Support teams use area codes to triage caller context, sales teams clean regional lead lists, telecom staff review dialing plans, and ordinary users check unfamiliar caller ID. The same clue is also easy to overread. A number can move with a mobile subscriber, route through VoIP, be forwarded, be reassigned, or be spoofed on caller ID. The code may describe where the number was assigned, while the person using it may be somewhere else.

Area-code records also change over time. Growing regions receive overlays, exhausted numbering areas enter relief planning, and some codes are assigned before they are put into service. Non-geographic service ranges are governed by different expectations than ordinary geographic area codes. A current assigned code is the right starting point for caller context, while reserved, available, planned, or special-use codes belong to numbering-resource research.

Area-code clues and interpretation limits
Clue	Helpful reading	Common mistake
Three-digit area code	Broad assignment area, service type, overlay group, status, and dialing-plan notes.	Treating the code as a live GPS, carrier, or identity signal.
`+1` or ten-digit phone number	The first three domestic digits identify the NPA that can be checked.	Assuming the exchange and line number were validated too.
Place or service phrase	Matching records can reveal likely codes for a state, province, island, city hint, or service range.	Assuming a city hint is a complete coverage map.

The NPA segment is enough for assignment context, but not enough to validate the full phone number or locate the caller.

The best area-code reading combines assignment status, use type, overlay relationship, dialing rules, source freshness, and caller-location caveats before the result is used in a support note, routing decision, or fraud review.

How to Use This Tool:

Start with the clue you have, then choose the narrowest scope that matches the question.

Enter a three-digit area code, a ten-digit NANP number, a +1 number, a city, a state or province, a country, or a service term in Area code, phone number, or place.
Keep Search scope on Current assigned codes for normal caller-context checks.
Choose Current geographic only when non-geographic and other service codes should be excluded.
Use All NANP records when reserved, available, planned, or special-use codes are part of the question.
Set Country or service filter only when the ledger is too broad or you already know the result should be in the United States, Canada, Caribbean and Atlantic records, or non-geographic service codes.
Leave Reference city aliases enabled for ordinary place-name searches. Turn it off when you want only official NANPA fields to drive matching.
Read Code Snapshot first, then use Match Ledger, Dial Plan, Reference Plot, Source Notes, and JSON for exports, audit notes, or deeper review.
If nothing matches, remove extra digits, check that the number is really under +1, clear restrictive filters, or switch to All NANP records for inactive and reserved codes.

Interpreting Results:

Status is the first field to check. In service is the normal signal for caller context. Assigned, not in service, Reserved, Available, and special-use labels are numbering-plan signals, not evidence of a live caller.

Location, Country, Reference city, and Time zone describe the area-code assignment. They do not prove where a mobile phone, VoIP account, forwarded call, or spoofed caller ID is physically located.

Overlay complex and Dial Plan rows are important when dialing behavior matters. If several area codes serve the same area, local calls may require ten digits or 1+10D patterns even when the call feels local.

Reference Plot points are approximate review coordinates. They are not service-boundary polygons, rate-center maps, emergency-service jurisdictions, or device locations.

Technical Details:

NANP numbers use the NPA-NXX-XXXX structure. NPA is the three-digit Numbering Plan Area code. NXX is the central office code or exchange. In NANP shorthand, N means a digit from 2 through 9 and X means a digit from 0 through 9. The +1 country code identifies the shared country-code plan, while the ten domestic digits carry the numbering assignment.

The lookup uses a NANPA NPA record snapshot dated May 18, 2026, with supplemental reference-city and coordinate hints for search and plotting. Official NANPA fields carry the status, assignment, overlay, time-zone, relief, jeopardy, map, planning-letter, and dialing-plan evidence. Supplemental hints help users search and visualize records, but they do not replace the official status fields.

Lookup Core:

Area-code lookup matching paths
Input path	Matching behavior	Boundary
Three-digit code	Matches the code directly and also recognizes overlay members when relevant.	The selected scope controls whether inactive, reserved, or available records appear.
Ten-digit or `+1` number	Extracts the first three domestic digits as the NPA.	The exchange and line number are not validated.
Place or service text	Compares normalized text with official fields, country labels, use labels, overlay text, dialing notes, and optional city hints.	Place hints are incomplete and approximate.
Filtered ledger	Scope, country or service filter, sort order, row limit, and city-alias mode shape the visible matches.	A hidden filter can explain a no-match result even when a record exists in the full NANP dataset.

Status Rules:

Area-code status interpretation rules
Displayed status	Underlying signal	How to read it
In service	Assigned is Yes and in-service is Yes.	The code is active for numbering use, but not proof of caller identity or location.
Assigned, not in service	Assigned is Yes and in-service is not Yes.	The code may be planned or assigned but is not yet a normal caller-context clue.
Reserved	Reserved is Yes.	The code is held aside and usually appears only when all NANP records are included.
Available	Assignable is Yes with no active assignment listed.	The code is numbering-resource context, not evidence that a caller used it.
Not assigned or special	No assignable active record, or a special type such as an easily recognizable code.	Use the source notes before treating the code as usable for ordinary phone-number context.

Dialing Plan Terms:

NANP dialing-plan abbreviations
Abbreviation	Meaning	Why it matters
`7D`	Seven-digit local dialing.	Possible only in some areas without conflicting local dialing requirements.
`10D`	Area code plus seven-digit number.	Common in overlays and areas affected by ten-digit local dialing rules.
`1+10D`	Trunk prefix plus area code and seven-digit number.	Often listed for toll, foreign-NPA, or permissive dialing contexts.
`NA` or blank	No listed rule for that context.	Confirm critical dialing behavior with a carrier or regulator before making changes.

Accuracy Notes:

Area-code data describes numbering assignments and planning records. It does not validate a full telephone number, identify a subscriber, locate a device, detect spoofed caller ID, or prove that a call originated in the listed region.

The embedded NANPA snapshot can become stale as area codes are assigned, activated, reserved, or moved through relief planning.
Reference cities and coordinates are supplemental search aids, not official coverage boundaries.
Fraud, compliance, emergency, billing, or identity decisions need carrier, regulator, law-enforcement, or authoritative business evidence beyond area-code context.

Worked Examples:

Caller ID triage

Entering 415 under Current assigned codes returns a California assignment context, status, overlay information, time-zone clue, and dialing notes. Use that as a support-routing hint, not as identity proof.

Full number extraction

Entering +1 212 555 0199 extracts 212 as the area code. The result can describe the NPA and its overlay complex, but it does not verify 555-0199, confirm the subscriber, or prove where the call was placed.

Reserved code research

A code such as 990 may not appear under current assigned scope because it is reserved rather than active. Switch to All NANP records to inspect reserved, available, planned, or special-use codes.

FAQ:

What countries and territories use NANP area codes?

The NANP shares country code +1 across the United States and its territories, Canada, Bermuda, and many Caribbean and Atlantic countries and territories. The matched Country field names the listed assignment when available.

Can an area code show where a caller is right now?

No. Area codes show numbering assignment context. Mobile service, VoIP, forwarding, number portability, reassignment, and spoofed caller ID can separate the displayed code from the caller's current location.

Why can I paste a full phone number?

For a ten-digit NANP number, or an eleven-digit number beginning with 1, the lookup uses the first three domestic digits as the area code. The rest of the number is not checked.

Why do some local calls require ten digits?

Overlays and certain dialing-plan changes can require the area code even for local calls. Read the Dial Plan rows for 7D, 10D, and 1+10D notes, then confirm operational changes with the provider or regulator.

Why did a city search miss an area code?

City names are supplemental hints and may not include every community served by an area code. Try the known three-digit code, a state or province name, the country or service filter, or All NANP records when a place name is absent or ambiguous.

Glossary:

NANP: The North American Numbering Plan, the shared +1 telephone numbering plan.
NPA: Numbering Plan Area, the three-digit area code at the start of a domestic NANP number.
NXX: The three-digit central office code or exchange after the area code.
Overlay complex: A set of area codes that serve the same or overlapping geographic area.
Relief planning: The numbering process used when an area code needs more central office code capacity.
Jeopardy: A condition where central office codes may run out before relief can be implemented.
Reference city: A supplemental place-name hint used for search and approximate plotting, not an official coverage boundary.

References:

CO Codes and Thousands-Blocks, NANPA.
NPA Reports, NANPA.
NPA Relief Planning, NANPA.
NPA Relief Planning Reports, NANPA.
Area Codes Required to Transition to 10-Digit Dialing, Federal Communications Commission.
Fake Caller ID Schemes, U.S. Government Accountability Office, December 18, 2019.