I applied for tenure last year and haven't been told by my administration whether or not it was granted. Is there a way to confirm whether or not I've received tenure?

If you haven't otherwise been informed, the number and type of observations you receive will change once you are tenured. If tenure was granted, you would be assigned a minimum of two informal observations as part of your yearly teacher evaluation instead of three informals and one formal. This would be reflected on your IPC (initial planning conference) preference sheet that you will receive at the beginning of the school year. 

Please note: if you receive tenure after the IPC window closes for the year (usually in late October), then the minimum number of observations would not be reduced until the following school year.