Area Code Lookup

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Area code, phone number, or place:

Examples: 415, (212) 555-0199, Ontario, or toll free.

Record scope:

Choose whether inactive and non-geographic numbering resources belong in the lookup.

NANP region:

Keep all regions unless a broad place or service search needs narrowing.

Reference city aliases:

City and coordinate hints are approximate and never identify a caller's live location.

Ledger sort:

The default ranking does not alter which records qualify.

Ledger limit:

The neutral default includes up to 1000 matches; choose 5–1000 rows.

rows

Field	Value	Authority	Copy
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The chart renderer is unavailable. Coordinate rows remain in the match ledger.

No supplemental coordinates are available for this match set.

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The first three digits of a North American Numbering Plan phone number identify a numbering-plan area, not the caller's current position. The plan covers the United States, Canada, several Caribbean and Atlantic territories, and non-geographic services under country code +1.

Area codes are assigned resources. Some are active geographic codes, some serve non-geographic purposes, and others are reserved, planned, or not yet in service. An overlay lets multiple area codes serve the same region, so a new number may receive a different code from an older number at the same address.

What area-code evidence can and cannot establish
Clue	Useful for	Does not establish
Three-digit area code	Assignment status, service type, region, overlay, and dialing-plan context	A caller's live or exact location
Full +1 phone number	Extracting its first three numbering digits	Who owns or currently uses the number
Place or service name	Finding related records in a reference dataset	A complete geographic coverage boundary

Mobile numbers, Voice over IP, call forwarding, and number portability all weaken the link between area code and present location. City labels and coordinates are useful search hints, but they are reference points rather than official service polygons.

Dialing rules also vary by area and call type. Seven-digit, ten-digit, and 1+ten-digit entries describe permitted or required dialing patterns in the numbering-plan record. A listed pattern should be checked against the current carrier and local dialing notice before changing a phone system.

How to Use This Tool:

Start with one area code, +1 phone number, place, or service phrase. Broaden the record scope only when active assignments are not the whole question.

Enter a value such as 415, (212) 555-0199, Ontario, or a non-geographic service name.
Choose Current assigned codes for ordinary lookup, Current geographic codes to exclude service codes, or All NANP records to inspect planned and inactive entries. Keep All NANP regions unless a broad place or service search needs narrowing.
Read the Code profile first, then use the Match ledger for alternatives. Check the source date and dialing note before treating the result as current operational guidance.

Interpreting Results:

The best match is the first qualifying record after scope and region filters. Its Status distinguishes active service from assigned-but-not-active, reserved, available, or special-use records. Use separates geographic numbering areas from non-geographic services.

Read an overlay complex as a shared service region, not as a parent-child ownership chain.
Use the official location and country fields for assignment context. Treat the reference city and plot coordinates as approximate search aids.
Check the dialing-plan fields for the selected area code instead of assuming every +1 number follows the same local pattern.
A plausible area-code match does not verify the caller, number owner, carrier, or present location.

Technical Details:

Numbering Plan Area (NPA) records combine assignment, in-service, use, location, overlay, time-zone, and dialing-plan fields. The lookup uses a frozen North American Numbering Plan Administrator snapshot dated May 18, 2026, with supplemental city and centroid references where available.

Lookup Core:

A three-digit input is used directly. A ten-digit number contributes its first three digits, while an eleven-digit number beginning with 1 contributes digits two through four. Other numeric lengths are treated as place or service text rather than as a phone number.

Area code lookup ranking rules
Match rule	Base rank	Effect
Exact extracted area code	0	Strongest numeric match
Extracted code appears in an overlay complex	4	Related overlay record
Area-code prefix match	8	Partial code lookup
Exact location, state, city, or country label	14	Strong place match
Whole search-text token	20	Exact word in indexed record fields
Contained search text	32	Broad textual match

Lower rank is better. Inactive records add 8 points and non-geographic records add 5, so active geographic results lead when relevance is otherwise similar. The alternate sort choices reorder qualifying records by code, location, or time zone without changing membership in the match set.

Scope and Status Rules:

Area code scope and status logic
Choice or label	Rule
Current assigned codes	The record is assigned and marked in service.
Current geographic codes	The current-assigned rule is true and the use code is geographic.
All NANP records	No assignment or service-status exclusion is applied.
In service	Both the assignment and in-service fields are affirmative.
Assigned, not in service	The assignment field is affirmative but the in-service field is not.

The query is limited to 120 characters. The ledger accepts 5–1000 whole rows. Exact code extraction and filters run before result limiting, so lowering the row limit does not change which record ranks first.

Accuracy Notes:

The lookup runs against bundled records, so the query is not sent to a numbering-data provider. The source snapshot can age between site releases.

Verify planned activation dates, recent relief changes, and dialing transitions against current NANPA or carrier notices.
Supplemental city names and coordinates are approximate and are not official boundaries.
Area-code evidence is unsuitable for identifying, tracking, or authenticating a caller.

Worked Examples:

Extract an area code from a full number

Entering (212) 555-0199 extracts 212 and ranks the exact NPA record first. The result can show New York assignment and overlay context, but it cannot establish where the caller is now.

Research a reserved or inactive code

A code absent under Current assigned codes may still exist in the numbering-plan snapshot. Switch to All NANP records and read its assignment, reservation, and in-service fields before concluding that the code is invalid.

References:

NPA Reports and NPA Database, North American Numbering Plan Administrator.