How to filter out VoIP numbers before sending an SMS OTP

The Lookup API's Line Type Intelligence package allows developers to detect the line type of a phone number, such as landline, mobile, fixedVoIP, or nonFixedVoIP. This can be useful in applications that require additional security measures, such as sending an SMS OTP, by filtering out VoIP numbers associated with bots. The line type intelligence package returns information about the carrier name, mobile network code, and country code of the phone number, which can help identify legitimate users. By combining the Lookup API with the Verify API, developers can filter out non-fixed VoIP numbers before sending an OTP, improving security and reducing the risk of bot interactions. The Line Type Intelligence package is part of a suite of data packages available from the Lookup API, including detection for SIM swap, live activity, call forwarding, and more.

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