  We calculate the mass spectra of $\Lambda_{c}$, $\Xi_{c}$, $\Sigma_{c}$,
$\Xi_{c}^{'}$, and $\Omega_{c}$ baryons in the framework of quark-diquark
configuration using relativistic flux tube model. The spin-dependent
interactions are included in the j-j coupling scheme to find complete mass
spectra. We satisfactorily describe the known singly charmed baryons in
quark-diquark configuration. The possible spin-parity $ J^{P} $ quantum numbers
are assigned to several experimentally observed states. Furthermore, some
useful mass predictions are given for more excited states that are reasonably
consistent with other model predictions for lower excited states. {From the
obtained results the Regge trajectories for these singly charmed baryons are
constructed in the ($J,M^{2}$) plane and the properties like linearity,
parallelism and equidistant are verified.} Also, these predictions should be
tested in future experiments.
