Bulk Phone Number Verification & List Cleaning Platform

Upload CSV/TXT contact lists and run bulk number verification across WhatsApp, Telegram, social platforms, email, crypto exchanges, and carriers. Clean unreachable contacts before campaigns, reduce wasted outreach, and export verified lists for CRM, sales, and API workflows.

WhatsApp Check Demo

Try one sample check here, then upload full CSV/TXT lists in the dashboard for bulk verification.

Need to check more numbers?

Start with 1,000 Free Checks

200+

Countries Covered

1M+ Numbers

per single batch file

Batch tasks

Detection Mode

Bulk Number Checker for All Major Platforms

As a leading bulk number checker, our upload dashboard and API support WhatsApp, Telegram, and more. Choose the detection type you need—iMessage, RCS, Telegram account age, Amazon valid email, crypto exchange, carrier, and other checks—then process your list at scale.

Telegram
WhatsApp
Phone Valid.
MAX
Netflix
Viber
iMessage
RCS
Amazon
Apple
Facebook
Instagram
Twitter
Microsoft
Zalo
Snapchat
Messenger
Signal
Line
GoTo
Threads
Spotify
Band
Indiatimes
HT
Cian
Airbnb
Crypto.com
Robinhood
Binance
KuCoin
CoinW
HTX
Email Valid.
Carrier

Bulk Upload Workflow for Clean Contact Lists

No QR Code Scan or Account Login Required

No-Code SaaS for Marketers

Upload CSV/Excel for Bulk Checking

  1. Upload your CSV file.
  2. Start validation.
  3. Download the clean list.

API for Automated Batch Workflows

RESTful API for list validation pipelines

Automate list validation from your CRM, data pipeline, or marketing stack. Use our number checker API to submit verification jobs and retrieve clean results programmatically.

How teams use NumberChecker.AI

G

We use NumberChecker.AI before outbound WhatsApp campaigns to remove unreachable contacts and split lists by platform signals. The export fits directly into our CRM workflow.

Growth Lead

Cross-border e-commerce team

P

The batch API gives our data team a clean way to submit verification jobs, monitor task status, and pull results back into internal risk and enrichment pipelines.

Platform Engineer

Fintech operations team

Frequently Asked Questions

Quick answers to common questions

How accurate is your number validation service?

NumberChecker.AI runs platform-specific batch tasks and returns structured result files for list cleaning. Accuracy can vary by platform, number format, region, and detection type, so we recommend testing with your own sample data first.

Can using number validation cause my account to be banned?

NumberChecker.AI is designed for non-intrusive validation workflows and does not require you to connect your personal messaging account. As with any data workflow, customers should use verified contact data responsibly and follow applicable platform policies and local regulations.

Can I use the WhatsApp number checker for marketing campaigns?

Yes. Teams commonly use WhatsApp and Telegram checks for campaign list cleaning before outreach. The goal is to reduce invalid or unreachable contacts and prepare cleaner segments for compliant sales, support, or marketing workflows.

How to check WhatsApp numbers in bulk?

Upload a CSV or TXT file in the dashboard, choose the WhatsApp detection type you need, and start a batch task. When processing is complete, you can download the result file and filter it for your CRM or campaign workflow.

Is the WhatsApp number validation API free?

New accounts can start with 1,000 free checks to test the workflow. Ongoing usage is pay-as-you-go, with pricing shown by detection type on the pricing page.

Can I filter invalid WhatsApp numbers automatically?

Yes. Bulk results can be exported and filtered so you can separate registered, unregistered, invalid, or unavailable numbers depending on the selected check. Many teams use this step before importing lists into CRM or outreach tools.

How much does the WhatsApp number checker API cost?

WhatsApp number checker API pricing uses a pay-as-you-go model. Rates vary by detection type, and the pricing page lists the current cost per 10,000 checks.

What platforms do you support?

We support WhatsApp, Telegram, Facebook, Apple, iMessage, RCS, Instagram, Amazon, Twitter, Zalo, Viber, Line, Microsoft, Binance for phone number detection, and Netflix, Facebook, Apple, Amazon for email detection. New platforms are added regularly.

How fast is the number validation API?

Bulk upload speed depends on list size, detection type, queue status, and target platform conditions. The API lets you submit verification jobs, check task status, and retrieve result files without manual dashboard steps.

Can I use this as an iMessage or RCS checker?

Yes. While many customers start with WhatsApp and Telegram, the same bulk upload workflow supports iMessage and RCS detection for next-generation messaging campaigns.

Do you support Amazon valid email checking and Telegram account age checker?

Yes. In addition to phone checks, NumberChecker.AI includes email-based checks for selected platforms and Telegram account age signals for teams that need more context before segmentation or review.

Use Cases for Every Business

From sales and marketing to e-commerce and developer integrations — validate numbers and emails at scale with one API.

For Sales Teams

Validate leads before outreach with our WhatsApp number checker for sales teams to increase connection rates.

For Marketers

Clean contact lists for marketing campaigns using our bulk WhatsApp, Telegram, and Instagram number validation tools.

For E-commerce

Ensure customer numbers are valid before shipping with our bulk phone number checker for e-commerce, reducing delivery failures.

For Developers

Automate your validation workflows with our seamless number checker API integration.

For Support & CRM

Keep contact databases clean and reachable. Verify numbers before campaigns to reduce bounce and improve deliverability.

Solution playbooks

Turn platform checks into ready-to-use workflows

Choose the business outcome first, then combine the right phone, social, email, crypto and carrier checks in one bulk task flow.

View all solution playbooks View supported checks and pricing Discuss my market

Campaign list cleaning

Upload WhatsApp or Telegram lists, remove unreachable numbers, then export a cleaner audience for sales, retargeting, or broadcast workflows.

WhatsAppTelegramCarrier
View playbook

Regional audience validation

Match each market to the apps people actually use: Zalo and LINE in parts of Asia, Viber and Telegram in selected regions, plus social checks where they matter.

ZaloLINEViber
View playbook

Risk and account intelligence

Add crypto exchange, email, social and carrier signals before manual review, KYC escalation, affiliate approval, or higher-cost verification steps.

BinanceEmailSocial
View playbook

Regional coverage

Build lists around local platform behavior

One upload flow, multiple market-specific checks.

Southeast Asia

WhatsApp, Telegram, Zalo and LINE coverage for commerce, education and finance lists.

View playbook

Latin America

WhatsApp-first campaign cleaning with carrier and social signals for sales teams.

View playbook

Europe & CIS

Viber, Telegram and carrier validation for mixed messaging preferences across markets.

View playbook

Featured guides on number & email verification

See how growth teams and developers use NumberChecker.AI for WhatsApp, Telegram, social media, email, and crypto exchange verification.

View all blog posts

Ready to Improve Your Campaign's ROI?

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