- Campgrounds, Frankford
- Car Detailing & Wash Service, Frankford - Auto Detailing
- Carpet Rug & Upholstery Cleaners, Frankford
- Casual Dining Restaurants, Frankford
- Catalog Services, Frankford
- Catalog, Mail-Order & Electronic Shopping, Frankford
- Catholic Churches, Frankford
- Child Related Social Services, Frankford
- Chinese Grocery Stores, Frankford
- Christian Churches, Frankford
- Churches 1 Of 3, Frankford
- Churches 2 Of 3, Frankford
- Churches 3 Of 3, Frankford
- City & County Government, Frankford
- Cleaning & Maintenance Services, Frankford
- Cleaning Supplies, Systems & Equipment, Frankford - Janitorial Supplies
- Clinics, Frankford
- CNC Machine Shop, Frankford
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- Colleges & Universities, Frankford
- Commercial Equipment, Frankford
- Community Services, Frankford
- Computer & Software Stores, Frankford
- Computer Repair, Frankford
- Computer Software & Services, Frankford
- Computer Software Service, Frankford
- Computer Stores, Frankford
- Computer Stores - Other, Frankford
- Concrete Contractors, Frankford - Concrete Construction & Concrete Companies
- Concrete Repair, Restoration, Sealing & Cleaning, Frankford
- Construction, Frankford
- Consultants & Services, Frankford
- Control Systems & Regulators, Frankford
- Convention & Meeting Facilities, Frankford - Meeting Rooms
- Cooking, Food & Beverage Equipment, Frankford
- Credit Unions, Frankford
- Crushed Stone & Rock, Frankford - Crushed Granite, Concrete, Gravel, etc
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