Carrier Tagger

Drop a CSV → strips it to phone numbers → tags each with carrier and line type. Free, no key, nothing uploaded anywhere but the carrier lookup.

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Choose a CSV or drag one hereAny CSV with a phone column — it is found automatically. Every other column is carried through to the export.

Carrier comes from the public LERG prefix tables, which record who a number block was issued to. Number portability means some lines have since moved carrier — no free source tracks that, so treat the column as a strong hint, not a guarantee. Landline and toll-free numbers are far less likely to have moved than mobiles.