We have used the Very Large Array to search for compact milliarcsecond-size radio sources near methanol masers in high-mass star-forming regions. Such sources are required for very long baseline Interferometry phase-referencing observations. We conducted pointed observations of 234 compact sources found in the NVSS survey and find 92 sources with unresolved components and synchrotron spectral indexes. These sources are likely the cores of AGNs and, thus, are good candidates for astrometric calibrators.

Cone search capability for table J/ApJS/166/526/table1 (12.2GHz Methanol maser sources considered)

Cone search capability for table J/ApJS/166/526/table3 (Sources resolved in C- or U-band observations)

Cone search capability for table J/ApJS/166/526/table4 (Parameters of possible calibrators)