1Lookup is a data verification and identity‑intelligence platform that helps sales, marketing, fraud, and operations teams ensure the quality and legitimacy of contacts, phone numbers, and IPs. By offering enterprise-grade email, phone, and IP validation—all via a unified API—1Lookup enables teams to prevent fraud, improve data hygiene, and scale growth with confidence.

1Lookup can help organizations verify email deliverability through real-time SMTP checks, identify disposable or role-based addresses, as well as determine risk with fraud scoring. For phones, it offers line-status verification, carrier detection, and spam‑check intelligence. With its IP lookup service, it identifies risky logins, VPN usage, and malicious behavior.

At the core, the major strengths of 1Lookup lie in performance and data freshness: sub‑300ms response times, daily updates from primary sources, such as FCC and telecom carriers, and a single “universal token” model empower teams with high-accuracy validation without complicated billing or outdated databases.
1Lookup
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1Lookup

+2 1Lookup helps companies maintain clean lead data, reduces bounce rates, protects sender reputation, and scales engagement efforts without the risk of bad or fraudulent contacts by combining real-time validation, fraud intelligence, and identity resolution.