Select Employee Groups
   
RBCU began as the Illinois Bell Telephone Company employees Credit Union. In the 1980s, after the breakup of Bell Telephone, Rockford Bell began to accept other employee groups.

• ACRUX Integrated Solutions
• Ameritech
• Approved Auto Sales
• Area U.C.C. Churches
• AT&T Communication
• AT&T Information Systems
• AT&T Technologies
• Beef-A-Roo
• Brink's Inc.
• Carlson Roofing Co.
• Christiansen Roofing
• Corvel Corp.
• Grant Park Auto Sales
• G.M. Moran Transportation
• Heaslip & Heaslip Attorneys
• Hootman Dental Lab
• Law Offices of Nerino J. Petro Jr.
• Lucent Technologies
• Martin & Associates 
• Maxim Communications Corp. 
• Medlin Communications
• Mid-City Office Products
• Muller-Pinehurst Dairy
• Professional Sales Affiliates
• R.A.M.P.
• R.J. Link International
• R.L. Leek
• Rock River Service
• Sage Technologies ( formerly - Midland Management)
• Tan Books & Publishers
• Zenith Cutter