cidr_table(5) on Linux
The text 8e985df4664c, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
format of Postfix CIDR tables
The text 8e985df4664c, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
format of Postfix CIDR tables