\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}