1Lookup

1Lookup is the world’s most accurate data verification platform built specifically for small and medium businesses. Our APIs validate phone numbers, emails, and IP addresses with enterprise-level accuracy at SMB-friendly pricing. Unlike competitors who recycle stale data, we update daily from primary sources including FCC feeds and carrier APIs, making us 15% more accurate and catching 25% more invalid numbers. Every validation includes intelligent fraud scoring (0-100 scale). Features include DNC compliance checking, carrier intelligence, spam detection, and real-time validation with sub-300ms response times globally.