# Porting availability Use this before creating a order to make sure all numbers are available for port in to Sinch. Please note that if you try to port a number that is not portable the order will fail. Endpoint: POST /portabilityChecks Version: 1.0 Security: basicAuth, bearerAuth ## Request fields (application/json): - `phoneNumbers` (array) Example: ["+12311234567"] ## Response 200 fields (application/json): - `phoneNumbers` (array) - `phoneNumbers.phoneNumber` (string) A phone number in E.164 format. Example: "+12345678901" - `phoneNumbers.portable` (boolean) Indicates if a number is portable or not. Example: true - `phoneNumbers.carrier` (string) The carrier to which the number belongs. Example: "T-Mobile" - `phoneNumbers.reason` (string) If applicable, the reason why the number cannot be ported.