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4. [Orisift Discussions](https://www.g2.com/products/orisift/discuss)

[
 ![Orisift](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_458abef1caf6195c836d7a2d70407a16/orisift.svg "Orisift")
](/products/orisift/reviews)

# Orisift Discussions

Orisift is one API for checking the contact data your forms and systems collect. A single POST /v1/lookup call checks phone numbers (format, numbering plan and ranges reserved for fiction), email domains (MX, Null MX, DNS and a list of 8,986 known throwaway-provider domains), IP addresses (reserved and special-purpose ranges, reverse DNS) and domains (A, MX, NS, SPF and DMARC records). Each lookup returns one of four verdicts, verified, risky, rejected or insufficient\_evidence, along with the evidence behind it. When a check can't be settled, it says so rather than guessing. There's a free Reserved Phone Number Checker, 3 free checks a day without an account, and a TypeScript SDK on npm (@orisift/sdk). It checks domains and numbering data, not individual mailboxes, carriers or identity.

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