Zelnum

Real-time and bulk phone number checks for WhatsApp, Telegram, Binance and 40+ services.

PlatformWebusage_basedglobal

Zelnum verifies phone numbers in real time through a REST API for moments like registration or checkout, and also offers a bulk platform where growth teams can upload a list of numbers to screen before an outreach campaign. It checks numbers against 40-plus services including WhatsApp, Telegram and Binance. Built for developers validating single numbers and marketing teams cleaning large contact lists.

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