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Validators
ITU Callsign Country Validator
Checks if a ham radio callsign matches the ITU prefix assigned to a country (e.g. PY Brazil, K USA, JA Japan). Displays country.
Prefixos ITU de rádio amador: PY/PP/PU = Brasil, K/W/N/AA-AL = EUA, JA/JE-JS = Japão, VK = Austrália, etc. Lista interna abrange ~200 países.
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CPF Validator
Validate Brazilian CPF numbers instantly using the official algorithm. Useful for testing document validation in applications. No data sent to servers.
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Batch CPF Validator
Validate a list of CPFs (one per line) and see which are valid and which are not. No data sent to servers.
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Batch CNPJ Validator
Validate a list of CNPJs (one per line) with a summary of valid, invalid and total. No data sent to servers.