pySortNet sorts IP addresses (IPv4 and IPv6) and hostnames given on standard input:

Usage: sortnet [OPTIONS]
  Options are:
    -e, --center ............ center output
    -l, --left-justify ...... left-justify output (default)
    -r, --right-justify ..... right-justify output
    -j, --justify ........... synonym for right-justify
    -i, --reverse ........... print output in reverse
    -u, --unique ............ output only the first of an equal run
  or:
    -h, --help .............. this brief help text
    -v, --version ........... print version information
    -c, --copyright ......... show copying policy