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Whatsapp numbers Filter

This project received 7 bids from talented freelancers with an average bid price of $190 USD.

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Employer working
Project Budget
$30-$250 USD
Total Bids
7
Project Description

i need a software to filter mobile numbers that have Whatsapp, i want to upload a csv file of list of phone numbers (thousands) and the application will export a csv file with list of numbers that are using whatsapp.
if your app can show last seen of that number it will be good point ( not mandatory)
application speed should be to export about 100K per day minimum

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