Carrier Lookup API

The Carrier Lookup API lets you query information about a phone number before you message or call it, including carrier name, line type (mobile, landline, or VoIP), and whether the number is currently able to send/receive messages. Running a lookup ahead of sending helps you route messages correctly, avoid delivery failures, and keep your outbound traffic compliant.

This API is subject to rate limiting. See Rate Limits for current quotas and details on the RateLimit-* response headers.

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