About CheckNumber.AI

CheckNumber.AI is a multi-platform phone number and email verification API service for businesses and developers. We provide a free online tool, bulk verification via CSV upload, and a powerful REST API so you can verify whether phone numbers and email addresses are registered across 45+ platforms including WhatsApp, Telegram, Facebook, Instagram, Amazon, Binance, and more. Our infrastructure handles the verification so you can focus on clean contact lists, campaign targeting, compliance, and CRM integration.

We do not send messages or access account content. We only check registration and validity of phone numbers and emails. No login or QR code is required on your side.

Free online tool: Check a single phone number or email instantly on our website — no login required.

Bulk verification: Upload CSV or TXT lists of phone numbers or email addresses. Verify across WhatsApp, Telegram, Viber, Facebook, Instagram, Amazon, Binance, and 45+ more platforms. Download results as CSV.

API integration: REST API supporting 45+ production-ready detectors. Suitable for CRMs, marketing automation, fraud prevention, and data enrichment pipelines.

Multi-platform support: Run checks across multiple platforms from a single API integration. Mix and match platform checkers in one batch.

We process phone numbers only for the purpose of WhatsApp registration verification. We do not store or use your contact lists for marketing or any purpose other than delivering the verification results you request.

For full details on data collection, use, and your rights, please see our Privacy Policy and Terms of Service (links below).

For pricing, API access, or bulk verification needs, reach out via our contact form, by email (consult@ekycpro.com), or on Twitter/X @CheckNumberAI. We typically respond within 24 business hours.