Denominator is a portable Java library for manipulating DNS clouds. Denominator has pluggable back-ends, including AWS Route53, Neustar Ultra, DynECT, Rackspace Cloud DNS, OpenStack Designate, and a mock for testing. We also ship a command line version so it's easy for anyone to try it out. Denominator currently supports basic zone and record features, as well GEO (aka Directional) profiles. See Netflix Tech Blog for an introduction.For your convenience, the denominator cli is a single executable file. Under the hood, the cli uses airline to look and feel like dig or git.