The mutual recognition of measurement results of National Metrology Institutes (NMI) is essential for science, industry,and consumer protection. The measurement capabilities of NMIs ,having quality management system and are supported by key and supplementary comparisons, are arranged in a public database (CMC) by the BIPM as appendix C of the Mutual Recognition Arrangement CIPM MRA drawn up by the CIPM in 1999. Since Hungary is a signatory of this MRA, the 388 CMC claims of the Metrology Authority ,as the Hungarian NMI, are available in the database.