/([\dA-Fa-f]{2}:[\dA-Fa-f]{2}:[\dA-Fa-f]{2}:[\dA-Fa-f]{2}:[\dA-Fa-f]{2}:[\dA-Fa-f]{2})/g);

##</code><code>##

/([\dA-F]{2}(?::[\dA-F]{2}){5})/ig);