For Sales Teams
Validate leads before outreach with our WhatsApp number checker for sales teams to increase connection rates.
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.
Profile Picture:
WhatsApp Status:
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. 
iMessage 
RCS 
TikTok 
LinkedIn 
Viber 
Zalo 
Amazon 
Facebook 
Netflix 
Apple 
Line 
Instagram 
Twitter 
MAX 
Microsoft 
Snapchat 
Messenger 
Signal 
GoTo 
Threads 
Spotify 
Band 
DHL 
Sideline 
Airbnb 
Pornhub 
Temu 
VK 
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
- Upload your CSV file.
- Start validation.
- 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 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.
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 playbookLatin America
WhatsApp-first campaign cleaning with carrier and social signals for sales teams.
View playbookEurope & CIS
Viber, Telegram and carrier validation for mixed messaging preferences across markets.
View playbookFeatured guides on number & email verification
See how growth teams and developers use NumberChecker.AI for WhatsApp, Telegram, social media, email, and crypto exchange verification.
Ad Lead Data Cleaning Workflow
Building a Secondary Filtering Workflow for Ad-Generated Leads
A technical guide to designing a secondary filtering workflow for ad-generated leads using bulk verification tools. Learn how to integrate carrier intelligence and platform registration signals to segment audiences and improve contact data quality before CRM ingestion.
Viber Contact List Hygiene
Viber Contact List Hygiene: A Guide to Cleaning and Segmentation for Better Outreach
Viber contact list hygiene involves using bulk verification to identify registered accounts, supporting better audience segmentation and regional outreach workflows.
Documenting Whatsapp Enrichment For Stakeholders
Documenting WhatsApp Enrichment So Stakeholders Read It Correctly
Most misuse of enrichment data starts with a field name and ends in a slide deck. Writing three lines of documentation per field prevents more problems than any amount of after-the-fact correction.
Format Validation Vs Live Phone Verification
Format Validation vs Live Verification: What You Actually Need
A technical comparison of structural format checks versus live carrier and provider intelligence, helping businesses choose the right tool for their bulk data workflows.
Whatsapp Avatar Checks Across Messaging Platforms
WhatsApp, Telegram, Viber and Zalo Profile Checks: Keeping Them Separate
It is tempting to merge several platform checkers into one contact-quality column. Doing so throws away the one thing that makes each result interpretable: which platform it came from.
Whatsapp Avatar Check For List Hygiene
Adding a WhatsApp Avatar Check to Your List Hygiene Routine
List hygiene routines usually stop at removing what cannot be reached. Adding a profile-enrichment pass gives the surviving rows a quality dimension, which is what operations teams are usually asked for next.
Whatsapp Avatar Enrichment Batch Integration
Integrating WhatsApp Avatar Enrichment into a Batch Data Pipeline
A one-off dashboard run and a nightly pipeline have very different failure modes. These are the design choices that keep a recurring profile-enrichment job predictable.
Whatsapp Demographic Enrichment For Segmentation
Segmenting an Audience with WhatsApp Demographic Enrichment
Demographic enrichment is the part of a WhatsApp profile check that marketing teams ask for by name. Building segments from it works well, provided the segments are honest about coverage.
