Vonage Account API APIs

Number Insight API

The Nexmo Number Insight API delivers real-time intelligence about phone numbers, including validity, line type, carrier, country, roaming status, and whether the number is currently reachable. It comes in three tiers — Basic for formatting and country lookup, Standard for carrier and line-type data, and Advanced for live network reachability and roaming detection — plus an asynchronous variant for high-volume Advanced lookups. Applications use it to validate sign-ups, score fraud risk, and choose the right channel before sending an SMS or voice call.