- Labor Organizations, National City
- Ladder & Lift Equipment & Machine Rental, National City
- Ladies Ready To Wear, National City
- Laminating Machine, Supplies & Equipment, National City
- Landscape Contractors & Designers, National City
- Landscaping, National City
- Late Night Restaurants, National City
- Laundromats & Dry-Cleaning, Coin-Operated, National City
- Laundry & Dry Cleaning Equipment & Supplies, National City - Cleaners & Dryers Sales, Repair, Service & Leasing
- Laundry Equipment Rental & Leasing, National City
- Laundry Self Service, National City
- Laundry Sewing & Repair, National City
- Lawn & Garden Decor & Ornaments, National City
- Lawn Mower Repair & Blade Sharpening Service, National City
- Lawyers & Attorneys, National City
- Leather Apparel Goods Manufacturers, National City
- Leather Goods, National City
- Leather Goods Stores & Dealers, National City
- Legal & Tax Services, National City
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- Legal Professionals, National City
- License Services, National City
- Life Insurance, National City
- Lighting Fixtures & Equipment, National City
- Linen Supply Services, National City
- Lingerie & Underwear for Women, National City - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, National City
- Loans Check Cashing, National City
- Loans Personal, National City
- Loans Title Services, National City
- Locks, National City
- Locksmiths, National City - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, National City
- Lodging, National City
- Lodging Services, National City
- Long Haul Trucking Companies, National City
- Lumber & Lumber Products, National City
- Lumber & Lumber Products, National City
- Lumber & Wood Products Manufacturers, National City
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