1Lookup

1Lookup is a data intelligence platform that gathers more than 43 verification and enrichment products behind one REST API. It’s aimed at businesses, developers and AI agents that need to check and improve contact and device data, plus spot spam or fraud risk.

Features cover a broad range of checks and enrichment, including phone and email validation, IP intelligence, reverse lookups, HLR and MNP checks, skip tracing, DNC scrubbing and firmographic or domain data. The service uses a universal credit balance model so you draw from the same pool for different lookups.

• Phone number validation and HLR/MNP
• Email verification
• IP intelligence and spam/fraud risk checks
• Reverse lookups, domain intelligence, contact enrichment
• Skip tracing, DNC scrubbing, firmographic data

Developers get REST APIs designed for integration, and the platform is presented as a single source to improve data quality, prevent fraud and enrich contact records. Official site: https://www.1lookup.io/