Orisift

Orisift is a developer API for checking contact and network data. Send a phone number, email address, IP address or domain to POST /v1/lookup. Phone checks cover format, numbering plan and reserved fiction ranges such as UK 020 7946 0xxx and US 555-0100 to 0199. Email checks look at the domain: MX, Null MX, DNS and a match against about 9,000 known throwaway-provider domains. IP checks flag special-purpose, bogon and reserved ranges. Domain checks read A, MX, NS, SPF and DMARC. Each response gives a verdict and its evidence. Orisift does not check mailboxes, carriers or phone liveness.

Phone format and reserved-range checks
Email domain MX / Null MX / throwaway list match
IP special-purpose and reverse DNS
Domain DNS / SPF / DMARC evidence
Verdict with named sources

Contact and network data checks in one developer API, with evidence and named sources in every response. It does not claim mailbox, OTP, carrier or phone-liveness checks.