You have 10,000 phone numbers. How many actually have WhatsApp? Don't waste messages on numbers that don't exist. Verify first, send later.
The Problem with Unverified Numbers
You buy a customer list or export numbers from your old system. You create a campaign and send 10,000 messages. But 3,000 numbers don't have WhatsApp. That's 3,000 wasted messages counted against your plan limit. That's money down the drain.
Worse — sending to too many invalid numbers can trigger WhatsApp's spam detection. Your number could get temporarily blocked or even permanently banned.
Warning
Sending bulk messages to unverified numbers significantly increases your ban risk. Always verify numbers before running campaigns. It's not optional — it's essential.
How Wavvy's Number Checker Works
Go to Number Checker → Create New Check → Upload your CSV file with phone numbers → Select which WhatsApp session to use → Click Start. The system checks each number against WhatsApp's database to see if it's registered.
Results show three categories: Valid (has WhatsApp), Invalid (no WhatsApp), and Unknown (couldn't determine). You can export valid numbers directly as a CSV for your next campaign.
Speed and Safety
Wavvy checks numbers at a safe speed to avoid triggering WhatsApp's rate limits. You can pause and resume checks anytime. The system automatically handles delays and retries.
For large lists (10,000+ numbers), the checker runs in the background. You can close your browser and come back later — it keeps running on the server. Check progress anytime from the dashboard.
Detailed Results Dashboard
The results page shows everything at a glance: total numbers checked, how many valid, invalid, and remaining. Progress percentage with a visual progress bar. Estimated time remaining. You can see individual number results and export filtered lists.
Smart Workflow
Import contacts → Run number checker → Export valid numbers → Use valid numbers in campaign. This workflow ensures 95%+ delivery rate and zero wasted messages.
Real Numbers
A Lahore e-commerce store had 15,000 customer numbers. They ran the number checker. Results: 11,200 valid, 3,800 invalid. They saved 3,800 messages per campaign. At 4 campaigns per month, that's 15,200 saved messages monthly. On the Professional plan, that's significant savings.
Never send blind again. Verify your numbers first. 10 minutes of checking saves thousands of wasted messages and keeps your WhatsApp account safe. It's the smartest first step before any campaign.