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
- Validate phone numbers in bulk and instantly see which ones are active, inactive, or flagged as risky before you send a single message.
- ZelNum returns carrier name, country, and line type for each number, so you know whether you are dealing with a mobile, landline, or VoIP line.
- Check whether a phone number is registered on WhatsApp or Telegram without opening either app or contacting the user directly.
- Clean up CRM contact lists by running bulk phone checks and filtering out invalid or unreachable numbers that waste your outreach budget.
- Access phone validation, carrier lookup, and WhatsApp or Telegram checks through a real-time API, making it easy to plug into your existing tools or workflows.
