  We present the results of an identification campaign of unassociated sources
from the Fermi Large Area Telescope 3FHL catalog. Out of 200 unidentified
sources, we selected 110 sources for which archival Swift-XRT observations were
available, 52 of which were found to have exactly one X-ray counterpart within
the 3FHL 95\% positional uncertainty. In this work, we report the X-ray,
optical, IR, and radio properties of these 52 sources using positional
associations with objects in various catalogs. The Wide-field Infrared Survey
Explorer color-color plot for sources suggests that most of these belong to the
blazar class family. The redshift measurements for these objects range from
z=0.277 to z=2.1. Additionally, under the assumption that the majority of these
sources are blazars, three machine-learning algorithms are employed to classify
the sample into flat spectrum radio quasars or BL Lacertae objects. These
suggest that the majority of the previously unassociated sources are BL Lac
objects, in agreement with the fact the BL Lac objects represent by far the
most numerous population detected above 10 GeV in 3FHL.
