Suppose I have C_IP address : 12.120.29.25
and I have list of following IP addresses : 212.120.128.0|19; 12.120.0.0|15; 12.120.16.0|20; 12.120.72.0|22; 12.120.96.0|20; 12.120.40.0|21; 12.120.0.0|21; 12.120.192.0|19; 12.120.16.0|22; 12.120.36.0|22; 12.120.80.0|20; 194.212.120.0|21; 212.120.32.0|19; 212.120.64.0|18; 212.120.192.0|19; 213.3.12.120|29; 116.212.120.0|24; 12.120.24.0|21; Now I need to map C_IP to list with longest prefix match. (As u can there are many IP address with 12.120. but I need to map to one with longest prefix match) -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/