- Radio Communications Equipment & Systems , Valley Center
- Real Estate, Valley Center - Agent, Broker & Companies
- Real Estate Appraiser, Valley Center - Appraisal Services
- Real Estate Appraisers & Consulting Services, Valley Center
- Real Estate Management, Valley Center
- Real Estate Services, Valley Center
- Recreational Organizations, Valley Center
- Religious Organizations, Valley Center
- Rendering Companies, Valley Center
- Repair Services, Valley Center
- Research Services, Valley Center
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- Residential Care Facilities, Valley Center
- Restaurants/Food & Dining, Valley Center
- Restoration Contractors, Valley Center
- Retirement Communities & Home, Assisted Living & Apartments, Valley Center
- Riding & Rodeo Services, Valley Center
- Road Construction, Valley Center - Companies & Contractors
- Road Construction & Repair Contractors, Valley Center
- Roofing Consultants, Valley Center - Roofing Companies
- Roofing Contractors, Valley Center - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Valley Center
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