Free Phone Number Lookup & Reverse Search Tool
Identify unknown callers instantly – Get caller ID, carrier details, CNAM lookup, and fraud alerts completely free.
No signup required. Works with US, Canada, UK, and international numbers. Trusted by 50,000+ users.
AI Phone Lookup Assistant
Welcome to Phone Lookup AI
Looking for a comprehensive solution for phone number search and validation? Instantly validate, search, and analyze phone numbers worldwide—just paste one or more numbers to get real-time verification, carrier, CNAM, and fraud insights powered by AI.
Try one of these examples:
Enterprise Phone Validation & Carrier Lookup API
Professional phone number validation API with comprehensive carrier lookup, CNAM caller ID resolution, and real-time fraud detection. Built for developers who need reliable phone data integration.
Get structured JSON responses with carrier data, validation status, and regex patterns for easy integration
Why 50,000+ Developers Choose Our Phone Validation API
Sent provides enterprise-grade carrier lookup and caller ID resolution completely free. Perfect for developers building contact validation, CRM systems, and fraud prevention tools:
🔍 Comprehensive Carrier Lookup
Get carrier name, network type, MCC/MNC codes, portability status, and LRN data for telecom integration
🚀 Developer-First API
Clean JSON responses, regex validation patterns, and bulk processing endpoints for seamless integration
🛡️ Real-time Fraud Detection
Advanced risk scoring and fraud pattern recognition to protect your applications from bad actors
🌍 International Validation
E.164 formatting, country-specific regex patterns, and global carrier database coverage
💡 Developer Tip
Integrate validation directly into your forms. Use our real-time API to validate phone inputs as users type, with country-specific regex patterns for client-side validation.
API Integration Workflow
Send Phone Number
POST to our endpoint with any phone format – we handle parsing, formatting, and normalization
Receive Structured Data
Get JSON response with carrier info, CNAM data, validation status, regex patterns, and fraud scores
Implement Business Logic
Use the data for form validation, contact scoring, fraud prevention, or telecom routing decisions
Complete Phone Intelligence API
Our comprehensive phone intelligence API delivers carrier lookup, caller ID resolution, portability data, and validation patterns. Perfect for CRM systems, fraud prevention, and telecom applications.
Complete API Response Schema:
Full Structure{
"data": {
"country_code": "US",
"national_format": "(555) 123-4567",
"phone_number": "+15551234567",
"record_type": "mobile",
"carrier": {
"name": "Verizon Wireless",
"type": "mobile",
"mobile_country_code": "310",
"mobile_network_code": "012",
"normalized_carrier": "verizon"
},
"caller_name": {
"caller_name": "John Smith"
},
"portability": {
"ported_status": "yes",
"line_type": "mobile",
"lrn": "+15551234567",
"city": "New York",
"state": "NY",
"ocn": "6664"
},
"fraud": { "risk_score": 15 }
},
"validation": {
"is_valid": true,
"regex_pattern": "^\\+?1?[2-9]\\d{2}[2-9]\\d{2}\\d{4}$",
"format_type": "US_mobile"
}
}🔧 Developer Integration Examples
• Contact Forms: Real-time validation with country-specific regex patterns
• CRM Systems: Automatic carrier enrichment and contact scoring
• Fraud Detection: Risk assessment and suspicious number flagging
• Telecom Routing: Carrier identification for call routing optimization
SDK support for JavaScript, Python, PHP, Go, and cURL examples in our documentation.
Developer Use Cases
🔍 Real-time Validation
Validate phone inputs as users type with carrier lookup and format verification for better UX.
📊 Contact Enrichment
Enrich contact records with carrier data, line type, and caller ID for better customer insights.
🛡️ Fraud Prevention
Build fraud detection systems using portability data, carrier intelligence, and risk scoring.
What Makes This Different from Other Phone Lookup Tools
Frequently Asked Questions
How can I lookup a phone number for free?
Just paste any phone number in the tool above and hit enter. You'll get instant caller ID, carrier details, and fraud alerts in under 3 seconds – completely free with no registration required.
Who called me from this phone number?
Our reverse phone search reveals the caller's name (when available), carrier information, location data, and spam risk score. Perfect for screening unknown calls before you answer.
What is CNAM lookup?
CNAM (Caller Name) is the official name registered with phone carriers. Unlike crowd-sourced databases, CNAM data comes directly from telecom providers, making it highly reliable for identifying legitimate callers.
Can I validate phone numbers in bulk?
Yes! Our bulk validation handles thousands of numbers simultaneously. Upload CSV files, paste unstructured lists, or use our API to clean entire databases. Great for marketing campaigns and CRM hygiene.
How accurate is your phone data?
We use the same carrier-grade databases as major telecom companies. Our data is updated in real-time and includes recent number transfers, making it 95%+ accurate for active numbers.
Is this really free forever?
Absolutely. No trials, no premium upsells, no credit card required. We believe phone validation should be accessible to everyone – from individuals screening calls to developers building the next big app.
Ready to Identify That Unknown Caller?
Join thousands of users who trust our free phone lookup tool for accurate caller identification, spam detection, and contact validation. No registration, no limits, no nonsense.
↑ Start by entering any phone number in the tool above ↑
🔒 Your searches are private and not stored
🌍 Works with US, Canada, UK, and international numbers