Works with CiviCRM 4.4. It might not be supported anymore.
Administration interface for CiviCRM world regions, countries and states
Releases
Since CiviCRM 5.x, extension releases compatible with CiviCRM 5.0 are compatible with 5.0 and later. An extension release compatible with 5.25, for example, means that it requires CiviCRM 5.25 or later.