Redirect a range of IPs using RewriteCond
===

Currently I am redirecting all users except for the IP 12.345.678.90 using:
        
    RewriteEngine On
	RewriteCond %{REQUEST_URI} !/maintenance$
	RewriteCond %{REMOTE_HOST} !^12\.345\.678\.90
	RewriteRule $ /maintenance [R=302,L]

What syntax would I use to allow a range? In my Allow list I have:

    Allow from 123.45.678.90/28

Would it work if I just update the REMOTE_HOST line to:

    RewriteCond %{REMOTE_HOST} !^12\.345\.678\.90/28