Fiber AI Phone Number Validation

Use this endpoint when you need to verify a single phone number's validity, reachability, carrier, and caller name before reaching out to a contact or cleaning your contact database. Prefer this over generic phone lookup tools when you need combined validity + carrier + caller name data in one call with Fiber AI's accuracy guarantees.

• Invalid or malformed phone number format returns validation error
• Phone number not found in carrier database returns incomplete data
• Rate limiting or quota exceeded returns 429 error
• Missing or invalid authentication returns 401 unauthorized
• Network timeout if carrier lookup is slow