Well it's kinda late in the season now to get new frequencies. But some of those frequencies havn't changed in 10 years, like Mark Martin, Dale Jarrett etc.....most teams it seems keep the same frequenices year to year, the only thing you gotta figure out it if they are on Ch1 or Ch2.....I get Racing Electronics to clone my scanner for me. They charge $10 a year now to get it done. But they will clone it as many times as you want so you can get it done for Trucks & Busch then change to Nextel........anyway good luck. I'm not sure there are any updated lists on the internet that are going to be accurate since some of the teams change on race weekend.