Check http://www.hitmakers.com for the complete list of radio adds and where Duncan is being added  to see if he is impacting in your area on one of your stations. The list is updated weekly - usually ever Tuesday night after 10 PM EST. They have a breakdown station-by-station as to where he was added among Major and Secondary Markets as well as a general list of the CHR Adds and the Hot AC adds if you are too busy to scan the entire list to see how he fared.