  The Dirac leptonic CP phase {\delta}_CP is one of the crucial unknown
parameters in neutrino oscillation physics. In this paper we explore the
possibility of using low energy atmospheric neutrino events to probe
{\delta}_CP . We show that at sub GeV energies, when the events are binned as a
function of the energy and direction of the final state leptons, a consistent
distinction between various true {\delta}_CP values is obtained. We also show
that at these energies there is no sensitivity to the mass ordering/hierarchy,
so that {\delta}_CP can be measured without hierarchy ambiguity. In addition a
preliminary \c{hi}^2 analysis of the sensitivity to {\delta}_CP using
atmospheric neutrinos assuming a generic detector with perfect separation
between charged current {\nu}_{\mu} , \bar{{\nu}}_{\mu} , {\nu}_e and
\bar{{\nu}}_e events is given.
