  The first year results of WMAP tentatively indicate running of the spectral
index as well as a deficit of power in the low multipoles in the CMB spectrum.
The former can be rather easily understood in the noncommutative inflation
model, and the latter, as we shall show in this paper, still appears to be an
anomaly, even though the noncommutative inflation model already suppresses the
low multipoles to a certain degree. By fitting the power spectrum, we determine
the string scale to be $l_s\sim 4\times 10^{-29}$cm.
