Single-photon sources in the telecom wavelength domain have a great significance in large distance quantum communication and in quantum information processing. We develop such a single-photon source on the basis of artificial atoms realized by rare-earth ion doped nanocrystals. We produce the artificial atoms by a milling assisted doping process. The artificial atoms are  excited by near-infrared lasers and emit photons  in the 1.5 μm wavelength telecom range. The addressing of individual emitters and the high-efficiency collection of the emitted single photon is realized by a confocal microscope setup.