  As yet, there is no underlying fundamental theory for the transplanckian
regime. There is a need to address the issue of how the observables in our
present Universe are affected by processes that may have occurred at
superplanckian energies (referred to as the transplanckian regime.
Specifically, we focus on the impact the transplanckian regime has on the dark
energy. We model the transplanckian regime by introducing a 1-parameter family
of smooth non-linear dispersion relations which modify the frequencies at very
short distances. A particular feature of the family of dispersion functions
chosen is the production of ultralow frequencies at very high momenta $k$ (for
$k>M_P$). We show that the range of modes with frequencies equal or less than
the current Hubble rate $H_0$ which are still frozen today provides a strong
candidate for the dark energy of the Universe.
