- Fabric Processing, Rockford
- Fabric Stores, Rockford
- Fabricated Metal Products Manufacturers, Rockford
- Fabrication Steel Manufacturers, Rockford
- Facial Skin Care & Treatments, Rockford
- Factory Outlet Stores, Rockford
- Faith Church, Rockford
- Family Law & Divorce Attorneys & Lawyers, Rockford
- Family Law & Divorce Lawyers & Attorneys, Rockford
- Family Medicine & General Practice Doctors, Rockford - General Practitioner (GP), Physicians & Surgeons
- Family Restaurants, Rockford
- Family Services & Care, Rockford
- Farm & Agricultural Trailers, Rockford
- Farm & Livestock Buildings, Rockford
- Farm Equipment, Rockford
- Farm Equipment Wholesale, Rockford
- Farms, Rockford
- Fast Food Restaurants, Rockford
- Fasteners & Miscellaneous Hardware Companies, Rockford - Wholesale, Manufacturers & Suppliers
- FAX Equipment & Supplies - Repair & Service, Rockford
- Fax Machines, Equipment & Supplies , Rockford
- Fax Service, Rockford
- Federal Administrative Agencies, Rockford
- Federal Department Of Transportation, Rockford
- Federal Economic And Regulatory Agencies, Rockford
- Federal Government, Rockford
- Feeders Automatic Animal & Fish, Rockford
- Fence Railings, Rockford - Fence Rails
- Fences & Animal Enclosure Contractors, Rockford
- Fencing & Gate Materials, Rockford
- Fencing - Fence Contractors, Rockford - Fence Installation & Repair - Wood, Metal, Vinyl & Wrought Iron Fences
- Fencing - Fence Supplies & Materials, Rockford - Fence Companies
- Fertility Specialists, Rockford - Reproductive Endocrinologist (RE), Doctors, Physicians & Surgeons
- Fiber & Corrugated Boxes, Rockford
- Filing Equipment Systems & Supplies, Rockford
- Filter Materials & Supplies, Rockford
- Filters Air & Gas Commercial & Industrial, Rockford
- Finance, Rockford
- Financial Advisory Services, Rockford
- Financial Institutions, Rockford
- Financial Management & Consulting, Rockford
- Financial Planning Consultants, Rockford
- Financial Services, Rockford
- Financing Personal, Rockford
- Fine Dining Restaurants, Rockford
- Finished Textiles Manufacturers, Rockford
- Finishing Contractors, Rockford - Basement Finishing
- Finishing Plants, Rockford
- Fire & Water Damage Restoration, Rockford - Cleanup & Repair Service
- Fire Alarm & Safety Equipment, Rockford
- Fire Alarm Systems, Rockford
- Fire Alarm Systems & Services, Rockford
- Fire Alarm Systems Testing, Rockford
- Fire Arms Instruction, Rockford
- Fire Department, Rockford
- Fire Extinguishers, Rockford
- Fire Protection & Prevention Consultants, Rockford
- Fire Protection Services, Rockford - Fire Alarm, Extinguishers, Etc
- Fire, Marine & Casualty Insurance, Rockford
- Firefighting Equipment & Supplies, Rockford
- Fireplace & Chimney Cleaning & Repair Service, Rockford
- Fireplace Accessories, Equipment, Tools & Decor, Rockford - Gas & Electric Fireplace
- Firewood, Rockford
- Fireworks Retail, Rockford
- Fish & Seafood Markets, Rockford
- Fish & Seafood Markets, Wholesale & Retail, Rockford
- Fish & Seafood Restaurants, Rockford
- Fishing Tackle, Equipment & Supplies Stores, Rockford - Lures, Rods, Reels, Baits, Poles & Fishing Gear
- Fitness, Rockford
- Fitness Centers, Rockford
- Flatbed & Cargo Trailers, Rockford - New & Used Trailer, Parts & Dealers
- Flock Manufacturers & Processors, Rockford
- Floor Cleaning, Waxing & Polishing, Rockford - Floor Care & Cleaning Service
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- Floor Refinishing, Installation & Resurfacing, Rockford - Hardwood, Laminate Flooring
- Floor Resurfacing Materials, Rockford
- Floor Tile Repair, Cleaning, Sealing & Refinishing Contractors, Rockford - Ceramic & Porcelain Flooring - Bathroom & Kitchen Tiles
- Flooring Contractors, Rockford - Laminate, Hardwood, Carpet, Tile, Vinyl, Linoleum, etc
- Flooring Materials & Supplies, Rockford - Flooring Companies & Stores
- Flooring Materials & Supplies, Rockford
- Flooring Stores & Dealers, Rockford - Carpet Rugs, Hardwood Flooring, Laminate Flooring, Ceramic Tile, Vinyl Flooring, Area Rugs & More
- Florists, Rockford - Flower Shops
- Flowers & Plants, Rockford
- Fondue Restaurant, Rockford
- Food, Rockford
- Food & Beverage Stores & Services, Rockford
- Food & Beverages - Wholesale & Retail, Rockford
- Food Banks & Services, Rockford
- Food Brokers, Rockford
- Food Brokers & Manufacturing Agents, Rockford
- Food Delivery Services, Rockford
- Food Product Manufacturers, Rockford
- Food Production Machinery - Manufacturers, Rockford
- Food Services, Rockford
- Footwear Manufacturers, Rockford
- Foreign Administrative Agencies, Rockford
- Foreign Government, Rockford
- Forestry & Logging, Rockford
- Forestry Equipment & Machinery, Rockford
- Forging, Rockford
- Forklift Rental & Sales, Rockford - Forklifts & Industrial Trucks
- Formal Wear Rental, Rockford
- Formal Wear Services, Rockford
- Formal Wear Stores, Rockford
- Foster Care Services, Rockford
- Foundation Contractors, Rockford - Foundation Repair & Install
- Foundations, Clubs, Associations, Etcetera, Rockford
- Foundries Other Metals, Rockford
- Foundry Supplies & Equipment, Rockford
- Franchise Consultants, Rockford
- Franchise Owners & Lessors, Rockford
- Franchise Services, Rockford
- Fraternal Organizations, Rockford
- Freezers Sales, Service & Repair, Rockford
- Freight Consolidators & Distributors, Rockford
- Freight Forwarder, Rockford - Freight Forwarding
- Freight Traffic Consultants, Rockford
- Frozen Food Locker Plants, Rockford
- Fruit & Vegetable Growers, Rockford
- Fruit & Vegetable Markets, Wholesale & Retail, Rockford
- Fuel, Rockford
- Fuel Dealers & Gas Stations, Rockford
- Fuel Injection Equipment & Service, Rockford
- Fuel Systems, Rockford
- Fuel Wholesale & Retail, Rockford
- Full Gospel Church, Rockford
- Full Service Breakfast Restaurants, Rockford
- Functions Related To Deposit Banking, Rockford
- Funeral Directors Supplies & Equipment, Rockford - Funeral Homes, Cemetery Supplies, Funeral Service & Crematories
- Funeral Information & Referral Services, Rockford
- Funeral Planning Services, Rockford
- Funeral Services, Crematory & Cemetery, Rockford - Funeral Homes & Directors
- Funeral Supplies, Rockford
- Fur & Leather Goods & Products, Rockford - Jackets, Coats, Vest, Clothes & Accessories
- Fur Apparel Manufacturers, Rockford
- Furnace Cleaning & Repairing, Rockford
- Furniture Accessories, Rockford
- Furniture Cleaning Commercial & Industrial, Rockford
- Furniture Manufacturers, Rockford
- Furniture Rental & Leasing, Rockford - Appliance Furniture & Decor Items
- Furniture Repair, Rockford
- Furniture Repair & Refinishing, Rockford
- Furniture Reupholstery & Repair, Rockford
- Furniture Stores, Rockford
- Furniture Stores - More, Rockford
- Furs Stores & Dealers, Rockford
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