NVS HTTP API

NVS (Number Validation Service) is an HTTP-based service that enables you to validate mobile numbers with Fortytwo. Being connected to the global GSM network, we can provide information about any number by querying our sources and relaying that information to you.

Number validation is provided in two versions: NVS and NVS plus. The request body for the two versions is the same, but you get a different response based on your access level. The main difference between the two services is as follows:

• NVS has global coverage and will provide a valid or invalid response for any successful requests.
• NVS plus can perform live lookups which responds with additional information as; handset is turned off or on, number is roaming and number is ported (if applicable).