- Hair Care Professionals, Guilderland
- Hair Removal Permanent, Guilderland
- Hamburger Restaurants, Guilderland
- Hardware Stores, Guilderland
- Health & Diet Food Products - Wholesale & Retail, Guilderland
- Health & Medical, Guilderland
- Health And Medical Centers, Guilderland
- Health Care Information & Services, Guilderland
- Health Clubs & Gymnasiums, Guilderland
- Healthcare Providers, Practitioners & Professionals, Guilderland
- Heating & Air-Conditioning Contractors, Guilderland - HVAC Contractors - Installation, Repair, Replace Service, etc
- Heating Contractors, Guilderland - Heating Systems - Installation & Repair
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- Highway Surfacing & Paving Contractors, Guilderland - Pavers - Paving Companies
- Holistic Health Practitioner, Guilderland - Holistic Medicine
- Home Decor Stores, Guilderland - Home Decorations, Supplies & Accessories
- Home Health Care, Guilderland - Agencies & Services
- Home Security Companies & Services, Guilderland - Home Alarm Systems & Security Systems, Video Surveillance System, Etc
- Horse Stables, Guilderland
- Horseback Riding Lessons & Instruction, Guilderland - Horse Riding School
- Hospitals, Guilderland
- Hot Dog Restaurants, Guilderland
- Hotels & Motels, Guilderland
- Household & Commercial Appliances Stores, Guilderland
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