- Race Car Dealers, Rockford
- Racing Car Supplies, Rockford
- Racing Including Track Operations, Rockford
- Radiator Coolant & Solvents, Rockford - Engine Coolant
- Radiator Repair, Rockford - Gas Tank Repair
- Radio & Television Repair Shops , Rockford - TV Repair
- Radio Communications Equipment & Systems , Rockford
- Radio Equipment & Parts Stores & Dealers, Rockford
- Radio Stations & Broadcasting Companies, Rockford
- Radiologists, Rockford - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, Rockford
- Radon Testing & Services, Rockford
- Railroad & Subway Construction Contractors, Rockford
- Railroad Companies, Rockford
- Railroad Contractors, Rockford
- Railroad Services, Rockford
- Range & Oven Repair, Service & Sales, Rockford
- Rape Victim Services, Rockford
- Reading Instruction Schools, Rockford
- Ready Mix Concrete, Rockford - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Rockford
- Real Estate, Rockford - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Rockford
- Real Estate Agent - Property Lessors, Rockford
- Real Estate Appraiser, Rockford - Appraisal Services
- Real Estate Appraisers & Consulting Services, Rockford
- Real Estate Attorneys & Lawyers, Rockford
- Real Estate Attorneys & Lawyers, Rockford
- Real Estate Broker, Rockford
- Real Estate Consultants, Rockford
- Real Estate Developers, Rockford
- Real Estate Farms & Ranches, Rockford
- Real Estate Lawyers & Attorneys, Rockford
- Real Estate Management, Rockford
- Real Estate Properties, Rockford
- Real Estate Referral & Information Services, Rockford
- Real Estate Rentals, Rockford
- Real Estate Services, Rockford
- Record Storage, Destruction & Management, Rockford
- Records, Tapes, CDs - Used & Vintage, Rockford
- Recreational Equipment & Supplies Companies, Rockford
- Recreational Equipment Repair & Service, Rockford
- Recreational Good Manufacturers, Rockford
- Recreational Services, Rockford
- Recreational Truck & Trailer Carwashes, Rockford
- Recreational Vehicles & Campers Rent & Lease, Rockford
- Recycling Drop-Off Centers, Rockford
- Recycling Scrap & Waste Materials, Rockford - Scrap Metal, etc
- Red Wing Shoes, Rockford
- Reducing Exercise & Weight Control Services, Rockford
- Reform Synagogues, Rockford
- Reformed Churches, Rockford
- Refrigerated Beverage Dispenser, Rockford - Water Coolers Equipment & Supplies
- Refrigerated Storage & Warehouse, Rockford - Warehousing
- Refrigerated Truck, Rockford
- Refrigeration & Cooling Equipment, Parts & Supplies , Rockford - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Rockford - Ac, Freezer, Refrigerator Repair
- Refrigerator & Freezer Equipment, Parts & Supplies, Rockford
- Refrigerator Sales, Service & Repair, Rockford - Fridge
- Refuse Collection & Disposal Services, Rockford
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- Rehabilitation Centers, Rockford
- Rehabilitation Centers, Products & Services, Rockford
- Rehabilitation Specialists, Rockford
- Rehabilitational Job Training Services, Rockford
- Relief Organizations, Rockford
- Religious Education, Rockford
- Religious Goods & Church Supplies Stores, Rockford
- Religious Organizations, Rockford
- Religious Practitioners, Rockford
- Religious Services, Rockford
- Rental & Leasing Business Equipment, Rockford
- Repair Services, Rockford
- Repossession Services, Rockford
- Research & Development Bureaus, Rockford - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Rockford - Laboratories
- Research Services, Rockford
- Residential, Rockford
- Residential Apartments, Rockford
- Residential Care Facilities, Rockford
- Residential Construction Contractors, Rockford - General Contractors
- Residential Construction Referral Services, Rockford
- Residential Landfills, Rockford
- Resorts & Hotels, Rockford
- Resorts Time Share, Rockford
- Resource Centers, Rockford
- Restaurant & Lounge, Bar, Or Pub, Rockford
- Restaurant Equipment, Rockford
- Restaurant Equipment & Supplies, Rockford
- Restaurant Equipment & Supplies Manufacturers, Rockford
- Restaurant Equipment Repair & Service, Rockford - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Supplies & Equipment, Rockford
- Restaurants/Food & Dining, Rockford
- Restoration Contractors, Rockford
- Retail Book Stores, Rockford
- Retaining Wall Contractors, Rockford - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement & Estate Planning, Rockford
- Retirement Communities & Home, Assisted Living & Apartments, Rockford
- Retirement Planning Consultants & Services, Rockford
- Retreat Facilities & Houses, Rockford
- Rheumatologists, Rockford - Rheumatology Doctors, Physicians & Surgeons
- Rigging Equipment & Supplies, Rockford
- Rigging Service & Crane Hoisting, Rockford
- Risk Management Consultants, Rockford
- Roadside Assistance, Road Service & Towing Service, Rockford
- Robots & Robotics System, Rockford
- Rods, Springs & Suspension Equipment & Supplies, Rockford
- Rollers Wooden Metal Rubber Plastic Etcetera, Rockford
- Roof Cleaning & Maintenance, Rockford - Roofing Services
- Roofing Consultants, Rockford - Roofing Companies
- Roofing Contractors, Rockford - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Rockford
- Rubber Products, Rockford
- Rubber Products - Retail, Rockford
- Rubber Stamps, Rockford
- Rust Preventives, Rockford
- RV & Campers Repair & Service, Rockford
- Rv Parks, Rockford
- RV Repair, Rockford - Recreational Vehicle
- Rvs Sales, Rental & Leasing, Rockford
- Ryder Truck Rental , Rockford - Ryder Moving
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