Local Number Portability (LNP) is available in many countries and regions. This service, popularized by consumer mobile phone use and commonly known as number porting, enables users to retain their telephone number when switching from their existing communications service provider (or carrier) to a new service provider. In many cases, LNP support is legally mandated, and the mandates may include strict process requirements and timeframes for action by the existing service provider.

Local Number Portability (LNP) is available in many countries and regions. This service, popularized by consumer mobile phone use and commonly known as number porting, enables users to retain their telephone number when switching from their existing communications service provider (or carrier) to a new service provider. In many cases, LNP support is legally mandated, and the mandates may include strict process requirements and timeframes for action by the existing service provider.