Regular expression

How to grep addresses :

echo 255.255.255.250 | egrep '(1[0-9][0-9]|2[0-4][0-9]|25[0-5]|[1-9][0-9]|[1-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])'

Can anyone do better ? I would love to see how  you do it.