NED service to retrieve Cross-IDs for a named object:
The NASA/IPAC Extragalactic Database (NED) provides a comprehensive fusion
of multi-wavelength data for hundreds of millions of objects located beyond
the Milky Way galaxy.
This service retrieves the names of sources which have been cross-identified
with the named object. NED is built around a master list of extragalactic objects,
for which multi-wavelength cross-identifications have been established. Cross-identifications
are based on a statistical, rule-based cross-matching algorithm that matches names,
positions, redshifts, and other relevant data to objects already in NED. These matches
are also vetted by human experts on the NED staff.