Bulk Phone Validator
The Bulk Phone Validator allows you to upload a list of phone numbers and verify their validity, format, and carrier details — helping you clean your data and improve deliverability.
🔒 Note: Bulk Phone Validator is available on premium plans only.
How to Use Bulk Phone Validator
Go to the Bulks page
Click on Phone Validator
Click + New Bulk and give your task a unique name
Upload your file containing phone numbers
📄 Accepted formats: .CSV or .TXT
📌 Your file should contain one phone number per row, preferably in international format (e.g., +14155552671)
Validation Checks Performed
For each phone number, Tomba provides:
Field | Description |
| Indicates if the number is active and callable |
| Identifies whether the number is mobile, landline, VoIP, etc. |
| Shows the telecom provider (e.g., AT&T, Vodafone) |
| Detected country or region based on the phone prefix |
| Properly formatted version of the phone number |
Download & Understand Results
After processing:
Click Download to export your results in
.CSVformatYou can choose to:
Download all results
Download only valid numbers
Download only invalid or unknown numbers
Tips for Best Results
✅ Ensure your phone numbers include the country code
✅ One number per row, in a single column
✅ Max file size: 4MB
✅ Max records per bulk: 10,000
Managing Your Bulk Tasks
Easily manage your phone validation tasks:
Sort: By task name, status, or date
Search: Quickly locate a specific bulk
Rename: Edit the name of your bulk task
Delete: Remove any task via the dropdown menu
Validate Phone Numbers in Excel
Tomba’s Microsoft Excel Add-in allows validation inside spreadsheets:
Open your file in Excel
Go to the Phone Validator tab
Select the column with phone numbers
Click "Validate phone numbers"
A new column will display validation results, status, and formatted output.
Validate Phone Numbers in Google Sheets
Open your Google Sheet
Go to the Phone Validator tab
Select the column with phone numbers
Click "Validate phone numbers"
Results will populate with:
Validity status
Carrier info
Region details
Proper formatting
Validate via API
You can validate phone numbers programmatically with Tomba’s API:
from tomba.client import Client from tomba.services.phone import Phone client = Client().set_key('ta_xxxx').set_secret('ts_xxxx') phone_validator = Phone(client) result = phone_validator.phone_validator('+14155552671')Official SDKs Available
Tomba offers SDKs for:
Python, PHP, Go, Rust, Ruby, Dart, JavaScript, C#, R, Lua, Elixir, and more.
Need Help?
Have questions or need support?
Contact us our team is here to assist you!