| Business | Phone |
| Arbitron 10877 Wilshire Blvd # 1600, Los Angeles 90024 | (310) 824-5906 |
| Atkins Research Group 4929 Wilshire Blvd, Los Angeles 90010 | (323) 933-3816 |
| Bizrate 4055 Redwood Ave, Los Angeles 90066 | (310) 571-1235 |
| Cultural Access Worldwide 445 S Figueroa St # 2350, Los Angeles 90071 | (213) 228-0300 |
| Diagnostic Research 7474 N Figueroa St, Los Angeles 90041 | (323) 254-4326 |
| Lieberman Research Worldwide 1900 Avenue Of The Stars #1550, Los Angeles 90067 | (310) 553-0550 |
| Look-Look 6685 Hollywood Blvd, Los Angeles 90028 | (323) 856-5555 |
| Meczka Marketing Research 5757 W Century Blvd, Los Angeles 90045 | (310) 670-4824 |
| Nielsen National Research Grp 6255 W Sunset Blvd # 19, Los Angeles 90028 | (323) 817-2000 |
| Plaza Research Corp 6053 W Century Blvd # 100, Los Angeles 90045 | (310) 645-1700 |
| Savitz Field & Focus 5757 W Century Blvd # 360, Los Angeles 90045 | (310) 642-4799 |
| Schlesinger Associates West 3330 Cahuenga Blvd W # 301, Los Angeles 90068 | (323) 876-9909 |
| Vital Research 6380 Wilshire Blvd # 1609, Los Angeles 90048 | (323) 653-7441 |
| Bizrate 12200 W Olympic Blvd # 300, Los Angeles 90064 | (310) 571-1235 |
| K 9 Marketing Research Inc 2931 S Sepulveda Blvd, Los Angeles 90064 | (310) 477-9004 |
| Sea 127 E 9th St # 705, Los Angeles 90015 | (213) 683-1106 |
| Godbe Research & Analysis Los Angeles 90014 | (213) 624-8863 |
| Bcs Network 5959 W Century Blvd, Los Angeles 90045 | (310) 410-4900 |
| Consumer Quest 12100 Wilshire Blvd # 1135, Los Angeles 90025 | (310) 207-6605 |
| Decision Analysis 12400 Wilshire Blvd # 1455, Los Angeles 90025 | (310) 979-0999 |
| Focus La 1849 Sawtelle Blvd # 670, Los Angeles 90025 | (310) 444-9199 |
| Girls Intelligence Agency 2049 Century Park E # 3600, Los Angeles 90067 | (310) 881-8004 |
| Horizon Research Corp 1055 W 7th St # 2290, Los Angeles 90017 | (213) 627-7100 |
| Consumerscope 419 1/2 S Cochran Ave, Los Angeles 90036 | (323) 933-5169 |
| New American Dimensions 6955 La Tijera Blvd, Los Angeles 90045 | (310) 670-6800 |
| Music Research Consultants 8344 Kirkwood Dr, Los Angeles 90046 | (323) 650-7616 |
| City Of La Cityride Program Los Angeles 90006 | (213) 808-7433 |
| Digital Connexxion 1120 W 2nd St, Los Angeles 90012 | (925) 513-7250 |
| Hangil Research Co 811 1/2 S Vermont Ave, Los Angeles 90005 | (213) 388-9110 |
| Mass Marketing 110 E 9th St # B1220, Los Angeles 90079 | (213) 688-7304 |