Yes, employers can use USPhoneBook to check up on you. USPhoneBook is a data broker that collects and sells personal information, including phone numbers, addresses, and social media profiles. Employers can use USPhoneBook to verify your employment history, education, and other information that you have provided on your resume or job application. Employers can also use USPhoneBook to check your credit report and criminal background. This is especially common for jobs requiring security clearance or handling money.