I'm not a perl programmer, and my example would cause laughter for everyone else and embarrassment for me. :)

Here's the output from the untested code:

Argument "BmM-oM-5" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "CM-c\ng" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-Q\nM-Ri" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-QC^CM-B" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "BM-o^CI" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-QC\0M-2" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-Q\nM-Ri" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-QC^CM-L" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-OM-^\M-X$" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "D>Ge" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "E^AM-BJ" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
Argument "M-X^OM-\fM-^E" isn't numeric in sort at /usr/bin/ipsort line 13, <$fh> line 12.
66.109.239.181
67.227.10.103
209.10.210.105
209.67.3.194
66.239.3.73
209.67.0.178
209.10.210.105
209.67.3.204
207.156.216.36
68.62.71.101
69.1.194.74
216.15.140.133

Thanks for everyone's time.