Phone number intelligence for modern apps
Lookup carrier, line type, and formatting—via a simple API.
PhoneLookupAPI helps you validate and enrich phone numbers with predictable responses and minimal overhead. Built for onboarding, verification, and routing.
Response-first
Designed around clear JSON and stable fields.
Drop-in
Works with any stack—no SDK lock-in required.
Example response
GET
{
"phone": "+16467418600",
"e164": "+16467418600",
"country": "US",
"valid": true,
"line_type": "mobile",
"carrier": "Example Wireless"
}Fields and availability vary by country and carrier data.
Everything you need—nothing you don't
A small surface area with the essentials for verification, enrichment, and routing.
Fast lookups
Low-latency responses with simple, cache-friendly endpoints.
Carrier + line type
Identify mobile vs landline/VoIP and fetch carrier when available.
Clean developer experience
Predictable JSON responses, clear errors, and straightforward auth.
Privacy-minded
Built for verification and enrichment flows—not creepy scraping.
Built for production
Stable field names, sensible HTTP status codes, and careful rate limiting so you can ship with confidence.
FAQ
What can I use PhoneLookupAPI for?
Verification, onboarding, fraud reduction, lead enrichment, and routing decisions (e.g. SMS vs voice).
Do you support international numbers?
Yes—formatting and lookup coverage depend on the destination country and upstream carrier data.
How do I authenticate?
Use your API key with HMAC-SHA256 signature verification. See your dashboard for full authentication details and code examples.