Have I made the regular expressions correctly?

Question

Regular Expressions

Hello, I need to block

172.16.31.0-255
172.16.32.0-255
172.16.33.0-255
172.16.34.0-255
172.16.36.0-255
172.16.239.0-255
172.16.39.0-255

^172\.16\.3[6-9]|4[69]|239\.\d*$

172.16.42.0-255
172.16.198.0-255
172.16.60.0-255
172.16.91.0-255
172.16.77.0-255
172.16.84.0-255
172.16.61.0-255

^172\.16\.42|198|60|91|77|84|61\.\d*
$

Answer 1

^172\.16\.3[6-9]|4[69]|239\.\d*$
Note that your alternatives
Correct syntax: 172\.(ab|c|de)
Rewrite using groupings.

Answer 2

try it
IP addresses like
172.16.31.0
172.16.31.100
172.16.31.255
will be blocked