Telegram Phone Checker
Instantly check if any phone number is registered on Telegram. Discover usernames, user IDs, and registration status for any Telegram account.
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API Integration Guide
Learn how to integrate this API into your applications with code examples and detailed documentation.
/api/check-phone-telegramBase URL
https://www.apipick.comFull Endpoint
https://www.apipick.com/api/check-phone-telegramphone_numberPhone number with international country code format
Example: +1234567890cURL Request
curl -X POST "https://www.apipick.com/api/check-phone-telegram" \
-H "Content-Type: application/json" \
-H "x-api-key: YOUR_API_KEY" \
-d '{
"phone_number": "+1234567890"
}'YOUR_API_KEY with your actual API keyJSON Response
{
"code": 200,
"registered": true,
"user_id": 123456789,
"username": "example_user",
"first_name": "John",
"last_name": "Doe",
"dc_id": 2,
"message": "User found successfully"
}✓Best Practices
- • Always include x-api-key header
- • Always handle errors gracefully
- • Validate input data before sending
- • Use HTTPS for secure communication
- • Cache responses when appropriate
ℹResponse Headers
- • Content-Type: application/json
- • x-api-key: Required for authentication
- • Status codes: 200 (success), 400 (error), 401 (unauthorized)
- • No rate limiting applied
What Information You Get
Registration Status
Check if the phone number is currently registered on Telegram platform
User Information
Get username, user ID, first name, and last name if available
Technical Details
Access data center ID and detailed API response information
Perfect for These Use Cases
Contact Discovery
Find if your contacts are on Telegram before inviting them
Business Research
Verify Telegram presence for business communication outreach
Security Verification
Check if phone numbers are associated with Telegram accounts
AI Agent Lead Enrichment
Integrate as an LLM tool to automatically enrich CRM leads with Telegram presence inside sales automation and AI-driven outreach workflows
How It Works
Enter Phone Number
Input the phone number with international country code format
API Query
Our system safely queries Telegram's infrastructure for registration data
Get Results
Receive detailed information about the account if it exists
Technical Information
Phone Number Formats
- • International: +1234567890 (recommended)
- • With spaces: +86 138 0013 8000
- • Alternative: 001234567890
- • Country codes: All worldwide supported
Response Data
- • Registration: Yes/No status
- • User ID: Telegram user identifier
- • Username: @username if set
- • Profile: Name and DC information
Privacy & Security
🔒 No Personal Data Stored
We don't store any phone numbers or personal information from your queries
⚡ Instant Results
Real-time checking without caching or logging your search history
🛡️ Secure API
All queries use encrypted connections and follow privacy best practices
📱 Public Information Only
Only publicly available Telegram information is returned
Frequently Asked Questions
Q: Is it legal to check if a phone number is on Telegram?
A: Yes, this tool only checks publicly available information and doesn't access private data. It's similar to searching for a username on any social platform.
Q: What information can I get about a Telegram user?
A: You can see if the number is registered, the username (if public), user ID, first/last name (if visible), and data center ID.
Q: Why do I need to include the country code?
A: Telegram requires international format phone numbers. The country code ensures accurate lookup across all global Telegram users.
Q: Can AI agents call this API as a tool?
A: Yes. The API accepts a single phone_number parameter and returns structured JSON, making it trivial to define as an OpenAI function, Claude tool, LangChain tool, or a CrewAI action. It is designed for use inside autonomous lead enrichment and research agent pipelines.
Use Telegram Checker in Claude Code & AI Agents
Install the official Claude Code skill to check Telegram registration status directly inside your AI coding agent — username, user ID, and profile data via natural language.
Ask your AI agent naturally
Compatible platforms
Claude Code skill for APIpick Telegram Checker API
Returns Telegram registration status, user ID, @username, display name, and data center — only publicly available profile information.