Numverify

Upload your CSV list or use our powerful real-time API. Clean your contact list and prevent fraud by validating phone numbers. Veriphone will validate, format, and look up the carrier and line type of any phone number. Instantly find if a phone number is valid or not. Works for all 248 countries and territories. Rewrite any valid phone number in a standard international or local format. Find a number's country based on its prefix or on the requesting IP address location. Find a phone number's line type, carrier, and region, whenever available. Validate your phone numbers list in minutes: Upload your CSV, validate, and download. Validate phone numbers in real time with our super-fast API go-to docs. We guarantee end-to-end encryption on all our services. Validated phone numbers are automatically and permanently deleted from our servers after every validation. Validate phone numbers on your favorite tools using our Zapier or Integromat integrations.

1Lookup is an enterprise-grade data verification and intelligence platform that gives businesses real-time, high-accuracy validation for phone numbers, email addresses, and IP addresses through a unified API, helping ensure data quality, reduce fraud, and protect user experiences. It aggregates data from authoritative sources, including carrier networks, FCC databases, and global threat feeds, with daily updates to deliver sub-second verification results that detect invalid, risky, or fraudulent identities, improve deliverability, and flag disposable or suspicious contact data. The core services include phone validation with HLR and carrier lookup, phone spam and risk detection, email address validation with SMTP checks and disposable domain screening, and IP intelligence for precise geolocation, proxy/VPN detection, and risk scoring, all accessible via modern REST API calls that scale to millions of daily lookups without rate limits.