- Tanning Salons, Rockford
- Tattooing, Rockford
- Tax Reporting Services, Rockford
- Tax Return Preparation, Rockford
- Tax Services, Rockford
- Taxi Cab Service, Rockford
- Taxi Service, Rockford
- Teeth Whitening Products, Rockford
- Teeth Whitening Products & Services, Rockford
- Telecommunications, Rockford
- Telecommunications Consultants, Rockford
- Teleconference Service, Equipment & Systems, Rockford
- Telephone Communication Service & Phone Companies, Rockford - Local & Long Distance Telephone Service
- Telephone Equipment & Phone Systems, Rockford - Sales, Service & Repair
- Telephone Jack & Wiring - Installation & Repair, Rockford - Phone Jack - Wiring
- Television Equipment & Systems Dealers, Rockford
- Television Stores & Dealers, Rockford
- Temp Agencies, Rockford
- Temporary & Contractor Agencies, Rockford
- Theater & Theatrical Supplies & Equipment, Rockford - Stage Lighting, Stage Curtains, Sets, Costumes, etc
- Thrift Stores, Resale & Consignment Shops, Rockford
- Tires - Wholesale & Retail, Rockford
- Title & Surety Insurance, Rockford
- Title Companies, Rockford - Title Search, Service & Abstract Company
- Tool & Die Makers, Rockford
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- Tool & Machine Designers, Rockford
- Tools & Hardware Supplies, Rockford
- Tourist Attractions, Rockford
- Towing Service, Rockford
- Toy Stores, Rockford
- Traffic & Transportation Engineer, Rockford
- Transportation, Rockford
- Transportation, Rockford
- Transportation & Traffic Consultants & Services, Rockford - Transportation Brokers & Consultants
- Transportation Equipment Manufacturers, Rockford
- Transportation Facilities & Services, Rockford
- Transportation For Handicapped & Elderly, Rockford - Senior & Disabled
- Transportation Rental & Leasing, Rockford
- Travel & Tourism, Rockford
- Travel Accessories, Rockford
- Travel Arrangement & Services, Rockford
- Tree & Shrub Transplanting & Removal, Rockford
- Tropical & Saltwater Fish Stores, Rockford
- Truck Rental & Leasing, Rockford - Rent a Truck & Tractor
- Truck Repair & Service, Rockford
- Trucking - Garbage, Refuse, Waste, Trash, Scrap & Junk Removal, Rockford - Collection, Removal, Disposal, Recycling, etc
- Trust And Will Attorneys & Lawyers, Rockford
- Trust And Will Lawyers & Attorneys, Rockford
- Tutoring Instructor, Rockford
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