Hello, i've got accounting from radius, do you know any opensource or well know algorithms (may be bash, C or mysql ) to calculate the prefix and be sure that the calcluation is sure (having the prefix tables in the CSV or any other format)? -- Pozdrawiam, Wojciech Ziniewicz Optocomp sp.z.o.o, www.optocomp.pl mailto: wojtekz(a)optocomp.pl +48(0)691031535