Your best shot is somewhere in the central US outside of a large metro area where the dial is crowded with a lot of cities. When I lived in NJ I dx'ed in the shadow of the NYC stations and because of the location way to the east and lots of traffic on the band it was a challenge. From there I did manage to log the following states: NJ, NY, CT, MA, RI, PA, DE, DC, MD, VA, NC, SC, GA, FL, AL, OH, MI, IN, LA, TN, KY, IL, MN, IA, TX, CO, UT, CA, NH, MO, WV... so if my math is correct that's 30 states... plus Canadian provinces of ON, QB, and NB, Cuba, the Bahamas, and Netherlands Antillies. My best catches were 5kw regionals KIMN Denver and KSD St. Louis.