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But the real test came two weeks later. A sudden blackout hit the valley, and the municipal alert system failed. Martín, however, had his backed up offline. He sent a single bulk SMS: "Blackout until 10 PM. Traffic lights down. Please drive slowly. Water pump at the hospital is on generator."

Martín signed up the neighborhood association in under an hour. He downloaded the structured database as a CSV file, containing validated mobile numbers, prefixes (like 11 for CABA, 299 for Neuquén, 297 for Chubut), and basic zone codes. No names, no addresses—just numbers and permission to text.

No existe una base de datos centralizada de libre acceso, sino que la información está segmentada: Protección de datos personales - Argentina.gob.ar