Help optimising regex please

[Mokita]

I know only the utter basics, and struggle with writing optimised code.

Is this line the best it can be - or can it be shortened?

RewriteCond %{REMOTE_ADDR} ^216\.104\.([0-9]|1[0-9]|2[0-9]|3[01])\.

I'm wondering if the following will work:

RewriteCond %{REMOTE_ADDR} ^216\.104\.([0-9]|[12][0-9]|3[01])\.

The IP range I am targeting is 216.104.0.0 - 216.104.31.255

TIA!

[sublime1]

Looks good to me.

[jdMorgan]

Even shorter - Make the "tens digit" optional for 10 through 29 and eliminate one 'Or' clause:

RewriteCond %{REMOTE_ADDR} ^216\.104\.([12]?[0-9]|3[01])\.

Jim

[Mokita]

Excellent Jim, thank you so much!