\documentclass{article}
\usepackage{multirow}
\begin{document}
\begin{tabular}{ |p{3cm}|p{3cm}|p{3cm}| }
 \hline
 \multicolumn{3}{|c|}{Country List} \\
 \hline
 Country Name or Area Name& ISO ALPHA 2 Code &ISO ALPHA 3 Code\\
 \hline
 Afghanistan   & AF    &AFG\\
 Aland Islands&   AX  & ALA\\
 Albania &AL & ALB\\
 Algeria    &DZ & DZA\\
 American Samoa&   AS  & ASM\\
 Andorra& AD  & AND\\
 Angola& AO  & AGO\\
 \hline
\end{tabular}
\end{document}