| Business | Phone |
| American Informatics 112 Sw 6th St # 509, Topeka 66603 | (785) 379-5590 |
| Bluewater Research Llc 5027 Nw Fielding Rd, Topeka 66618 | (785) 246-1115 |
| Central Research & Consulting 534 S Kansas Ave # 900, Topeka 66603 | (785) 233-8948 |
| Information Research Corp 214 Sw 6th Ave # 100, Topeka 66603 | (785) 296-3363 |