ZelNum is a phone number verification platform with two sides built for two audiences.
Developers use the real-time API to validate single numbers at key moments — user registration, checkout, form submission — through one REST API.
Growth and marketing teams use the online bulk platform to screen large lists before outreach: paste numbers directly or upload a TXT/CSV file, run hundreds of thousands of numbers in one job, and download cleaned results. No code required.
Flagship detection products include WhatsApp number checks, Telegram number checks, Binance account checks, and HLR lookup — among 40+ products covering app registrations, carrier status, and number activity.
New accounts get free testing credit to evaluate real results before spending. Whether you need one number verified in milliseconds or a 500,000-row list screened before a campaign, ZelNum covers both without switching tools.
