This package contains two modules. Number::Phone is a base class for parsing and dealing with phone numbers. Number::Phone::UK inherits methods from it, over-riding some with UK- specific implementations. The intention is that other people will write other country-specific classes exposing the same API. To install these modules, do the usual dance: perl Makefile.PL make make test make install Please note that the build-data.* files are not intended for your use. I use them to re-build the database of UK number allocations. If you choose to use them, on your own head be it!