How to clean a purchased phone list with Checkfast.pro checkers

A purchased list is rarely send-ready. Even fresh files contain dupes, landlines, VoIP and numbers without WhatsApp/Telegram.

Step 1. Normalize

Convert phones to E.164, remove dupes and empty rows. See E.164 guide.

Step 2. Cheap layers

phonecheck and active_check cut format junk and inactive SIMs.

Step 3. Messengers

WhatsApp and Telegram as separate tasks. Waterfall saves SMS budget.

Step 4. Carrier

Carrier detection helps pick SMPP routes.

Buy a niche: Databases. Run checks: dashboard.