This task can be performed using ZelNum
Phone Validator, carrier lookup, WhatsApp & Telegram verification
Best product for this task
ZelNum
marketing
ZelNum helps you verify phone numbers and work with cleaner contact data. Its Phone Validator checks number format and status, adds available country, carrier and line-type details, and flags invalid or potentially risky records. WhatsApp and Telegram checks show whether a number is registered on each platform. Use the results to improve CRM data quality, prepare contact lists and reduce wasted messages. Real-time lookups, bulk checks and API access are available.
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What to expect from an ideal product
- ZelNum's Phone Validator checks number format and active status so you stop calling dead lines stored in your CRM for months.
- Bulk phone validation lets you clean hundreds or thousands of contacts at once instead of manually reviewing records one by one.
- Carrier and line-type details flag mobile versus landline numbers, helping you segment contacts before running SMS or WhatsApp campaigns.
- WhatsApp and Telegram registration checks show exactly which numbers are reachable on each platform, so you route messages where they actually land.
- Real-time API access lets your CRM validate phone numbers at the point of entry, preventing bad data from building up in the first place.
