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Area Code & State Finder for Phone Numbers

Upload a CSV to append reference-based area code, NPANXX, and state context to US phone numbers. This is a lookup and enrichment workflow for routing, segmentation, and reporting; it does not filter rows from the source file.

United States only Free
1Upload 2Configure 3Process 4Download
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Drop your CSV file here or click to browse
Supported: .csv, .txt, .tsv  -  Max 50MB site upload setting
Configure
Which column contains the 10-digit phone numbers?

Outputs include normalized phone values and optional NPANXX + state fields (based on reference data).

Tool information

What it does

Upload a CSV to append reference-based area code, NPANXX, and state context to US phone numbers. This is a lookup and enrichment workflow for routing, segmentation, and reporting; it does not filter rows from the source file.

How it works

  1. Upload your CSV file
  2. Select the phone column
  3. Run the tool to append location context
  4. Download the enriched output

Output / privacy

Normalizes phones, extracts NPANXX, and appends state from reference data.

Uploads and generated files are stored privately and retained for the configured retention period.

Reference-based phone enrichment

The output maps normalized US phone-number prefixes to the reference data available to the tool. It does not identify a person’s current physical location or provide carrier-level precision.

For example, a call center can append state and NPANXX fields to a bulk lead export, then use those fields for territory assignment or reporting without removing any source rows.

FAQ

What does this tool append?
It appends location context based on the phone number, such as area code and state fields for routing and segmentation.
Can I run it on bulk lists?
Yes. Upload your CSV, select the phone column, and download the enriched export.
Is my upload public?
No. Uploads and outputs are stored privately and served via protected download links.