Verify 100,000+ phone numbers in under 5 minutes. Upload CSV, detect inactive numbers, validate formats, and check WhatsApp, Telegram, and 40+ app registrations — all in one batch.
Upload CSV/TXT → Auto-validate → Download sorted results. 99.99% accuracy. 200+ countries.
View API Documentation| Check Type | What It Detects | Why It Matters |
|---|---|---|
| Format Validation | E.164 compliance, country code validity, digit length | Eliminates malformed numbers before API calls |
| Duplicate Detection | Exact and near-duplicate numbers in your list | Reduces processing costs, avoids double-counting |
| Carrier Status (HLR) | Active, inactive, ported, roaming status | Identifies dead numbers that waste campaign budget |
| Line Type | Mobile vs landline vs VoIP vs premium | Ensures SMS/WhatsApp campaigns target mobile only |
| WhatsApp Status | Registered on WhatsApp? Business or personal? | Critical for WhatsApp marketing campaign targeting |
| Telegram Status | Has a Telegram account? | Essential for Telegram-based outreach |
| 40+ App Detection | Facebook, Instagram, Signal, Viber, etc. | Multi-channel campaign planning |
| Country & Region | Country code, region, time zone | Compliance with local regulations, send-time optimization |
Check individual WhatsApp registration status. Free, no login.
Verify individual Telegram account status. Bulk API supported.
Validate E.164 format, detect country & carrier for single numbers.
Calculate savings from cleaning your list before bulk campaigns.
For automated bulk validation in your own applications, use our REST API. SDKs available for Python, Node.js, PHP, and Go. Features include:
Read the full API integration guide →
Clean your contact list before every campaign. Remove 20-30% of inactive numbers that waste budget. Improve deliverability and ROI. Complete list cleaning guide →
Before sending WhatsApp templates, verify which numbers are actually on WhatsApp. Avoid paying for messages sent to non-WhatsApp numbers. Bulk WhatsApp verification guide →
Enrich your CRM with real-time phone number intelligence. Flag invalid numbers, detect carrier changes, and know which messaging channels are available for each lead.
Upload a CSV or TXT file with phone numbers. Our engine processes numbers in parallel batches — validating format, checking carrier status via HLR lookups, and verifying app registration (WhatsApp, Telegram, etc.). Results are auto-classified as active, inactive, or invalid. Processing speed: 100K+ numbers under 5 minutes. Learn more about the technology →
CSV (.csv), Excel (.xlsx, .xls), and plain text (.txt, one number per line) are all supported. Numbers should be in international E.164 format (+[country code][number]) for best results. The system auto-detects and standardizes most common formats. See the phone number format guide for country-specific examples.
Standard speed: 100,000 phone numbers processed in under 5 minutes for basic validation (format + carrier). For multi-app detection (WhatsApp, Telegram, Facebook, etc.), processing takes 10-15 minutes per 100,000 numbers. For millions of numbers, our API supports parallel batch processing with webhook completion callbacks.
Our web-based tools are 100% free for individual checks. For bulk validation (1,000+ numbers), we offer affordable API plans starting at $1 per 10,000 checks. Contact us on Telegram (@ayongzhanshen) for high-volume enterprise pricing and custom SLAs.
Yes. Numbers are processed in real-time and not stored on our servers after verification. All data transmission is encrypted via HTTPS/TLS. We do not retain, resell, or log phone number lists. See our Privacy Policy for details.