Most people don't recognize the number 800-357-1509, but if you're in business, you should. That's because it's the FTC's National Do Not Call Registry number. 800-357-1509 - What Is It? The 800-357-1509 phone number is the company's customer service line. The number enables customers to contact a customer service representative about their order, product, or other inquiries. The benefits of … [Read more...] about What you need to know about 800-357-1509