How to Use the WhatsApp Number Verifier

This guide explains how to prepare your phone numbers, preview the verification request, create a verification job, monitor processing, and download the registered WhatsApp numbers from LastDatabase.

Overview

The WhatsApp Number Verifier is designed for bulk verification workflows. You provide phone numbers, LastDatabase normalizes and deduplicates the input, creates the verification job, processes the numbers, and makes the registered-number results available for CSV download.

1. Prepare Your Phone Numbers

Prepare one phone number per line or use the supported upload workflow. International phone numbers should include the country calling code.

Supported input examples

+8801XXXXXXXXX
008801XXXXXXXXX
8801XXXXXXXXX

LastDatabase normalizes supported international formats before creating the verification job and removes duplicate numbers from the submitted input.

2. Open the WhatsApp Verifier

Sign in to your LastDatabase customer account.
Open the customer dashboard.
Select WhatsApp Number Verifier.
Enter or upload the phone numbers you want to verify.

3. Preview the Verification

Use the preview option before creating the job. The preview helps you review the normalized number count and the estimated verification cost.

WhatsApp verification is currently priced at $0.01 per number.

4. Make Sure Your Wallet Has Enough Funds

Verification charges use the messaging verification wallet. If your available wallet balance is too low, use the Add Funds section before submitting the job.

5. Create the Verification Job

Review the preview.
Confirm the number count.
Confirm the estimated cost.
Select Create Verification Job.

After submission, the job appears in your verification history and progresses through the verification workflow.

6. Monitor the Verification Status

The job page displays the processing state and result totals. Keep the job page available while processing or return to it from your verification history.

Result classifications can include registered, unregistered, and unknown numbers.

7. Download the Registered Numbers

When the job is complete, use the CSV download option. The customer CSV download contains only numbers classified as registered.

The CSV is intentionally simple and contains the phone_number column for the registered results.

Usage Tips

Use international country-code format.
Preview the job before submitting it.
Check your available wallet balance first.
Use the completed-job CSV for registered numbers.
Keep separate country groups when preparing large verification lists.