Описание тега libphonenumber
Google's common Java, C++ and Javascript library for parsing, formatting, storing and validating international phone numbers. The Java version is optimized for running on smartphones, and is used by the Android framework since 4.0 (Ice Cream Sandwich).
libphonenumber is a library for handling phone numbers. It can parse and format phone numbers as well as provide geographical information about phone numbers.
libphonenumber is written by Google engineers and is used in Android and other Google projects.