Validate phone numbers, detect carrier, line type (mobile/landline/VoIP), country, and format to E.164. Instant, no external APIs needed.
GET /validate?phone=%2B14155552671 X-API-Key: csk_your_key
{
"valid": true,
"e164": "+14155552671",
"country": "US",
"carrier": "AT&T",
"lineType": "mobile",
"nationalFormat": "(415) 555-2671"
}
Production-ready with comprehensive coverage and fast response times.
Validates and normalizes to E.164 international format.
Identifies the mobile carrier or telecom provider.
Distinguishes mobile, landline, VoIP, toll-free, and premium numbers.
Comprehensive coverage including all major and minor regions.
No external lookups — returns results in under 50ms.
Validate up to 500 numbers per request for bulk imports.
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