Validate
View All Number Validator APIs →Validate a phone number and retrieve carrier, geographic location, and line type. Send the number in E.164 or national format with optional country code. Use for real-time validation at signup, lead enrichment, outbound list cleaning, and fraud or deliverability checks.
API Features
International number validation Confirm validity of phone numbers from 232 countries using international dial codes and numbering plan data
National number validation Validate local numbers by supplying an optional two-digit country code for region-specific checks
Carrier detection Retrieve carrier or operator associated with the number to verify legitimacy and support routing decisions
Location data Get country and geographic information with each request for routing, compliance, and data enrichment
Line type detection Identify line type to reduce undelivered messages and improve communication effectiveness
Single-call JSON response One POST with number returns validity, carrier, location, and line type in structured JSON
Live API Demo
API Response (JSON)
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Use Cases
- Signup and login: reject invalid formats and flag suspicious patterns before sending OTP or 2FA
- Lead validation and scoring: normalize numbers and classify type to improve CRM quality and reach rates
- Outbound SMS and voice: remove invalid numbers from lists to lower cost and improve deliverability
- Fraud and risk scoring: use validation and carrier signals in risk engines to detect suspicious patterns
- Data hygiene: bulk-clean phone fields and normalize to E.164 for storage and downstream systems
- Geographic dispatching: use country and location data to route prospects to regional sales or support