1Lookup

1Lookup is an enterprise data verification platform that helps businesses validate and enrich contact and network data in real time. It focuses on accurate phone, email, IP, and identity intelligence using multiple data sources.

The platform offers several APIs and tools, including phone validation, reverse phone lookup, carrier lookup, HLR (Home Location Register) lookup, email validation, IP intelligence, domain intelligence, phone append, and reverse email append. These services help confirm that contact details are valid, reachable, and safe to use, while also adding missing information such as names, addresses, and carrier details.

1Lookup uses a universal credit system and provides free credits so users can test the services before paying. Pricing is usage-based, with no complex tiers, making it suitable for both small and mid-sized businesses.

• Verify phone numbers and emails to reduce bounces and bad leads.
• Identify risky IPs and detect fraud or suspicious activity.
• Enrich records with additional contact and business data.
• Support compliance needs such as DNC and risk assessment.
• Integrate via APIs into CRMs, marketing tools, and internal systems.

This website is useful for developers, marketers, sales teams, and risk or compliance teams who need reliable data verification and enrichment services that can scale with their applications.