435 North American OOH ad operators ranked by number of digital billboards (Billboard Insider)
This list includes billboards only and not place based and transit. The count is based on display faces not flips so 1 digitial display counts as 1. We based the list of a review of websites and emails to company execs. […]
billboardinsider.com
Wed, Feb 21 at 9:35 PM
Wed, Feb 21 at 9:35 PM