\172.21.89.2222octhourly2oct_samik.txt
\172.21.89.2223octhourly3oct_samik.txt
\172.21.89.2224octhourly4oct_samik.txt
\172.21.89.2225octhourly5oct_samik.txt

for %i in (2 3 4 5 6) do copy \172.21.89.222%iocthourly*.txt