| Business | Phone |
| A C Nielsen Media Research 1639 Beeler St, Aurora 80010 | (303) 364-8439 |
| Castle Rock Media Aurora 80015 | (303) 400-4455 |
| Interactive Media Group 24055 E 6th Ave, Aurora 80018 | (303) 623-7777 |
| Minshall Media Consulting Aurora 80015 | (303) 400-4500 |