\documentclass[12pt]{scrartcl}
\usepackage[table]{xcolor} 
\xdefinecolor{gray95}{gray}{0.95}
\def\mc#1{\multicolumn{1}{@{}|r@{}}{#1}}
\begin{document}
 
{\tabcolsep=3pt
\begin{tabular}{@{}rcrlr@{}}
 \multicolumn{4}{c}{Frequenzbereich} & \llap{Bandbreite} \\\hline
   6,765 & \ldots & 6,795 & MHz &  \mc{30 kHz} \\
\rowcolor{gray95}  13,553 & \ldots & 13,567 & MHz &  \mc{\colorbox{gray95}{14 kHz}} \\
  26,957 & \ldots & 27,283 & MHz &  \mc{326 kHz} \\
\end{tabular}
}

\end{document}