Trying to find window manufacturer from sticker on vinyl window
If you know who the home builder was you may be able to get in touch with them.  Generally they will know which company they went with...if that isnt possible depending on the age of the window you may be able to take it to a builder's supply or big box store and get an answer.

All that said replacing a window pane is generally pretty easy and most hardware/big box stores will cut the glass to size for you.  If it is double pane that could be a little more tricky.