$ echo "10.34.2.252
> 10.34.2.250
> 10.34.2.248" | perl -nle 'print "$_ -> ",unpack "H*", eval'
10.34.2.252 -> 0a2202fc
10.34.2.250 -> 0a2202fa
10.34.2.248 -> 0a2202f8