I can talk about what the number 143 means. As it's most likely related to something personal, out the realm of numerology calculations, you'll need to determine why you're seeing it so often. The "same number everywhere" articles may provide information that will help.

The number 143 represents material abundance associated with independent action. It's a materialistic number, also a number of management, company leadership, and legal procedures. The number is fulfilled through independent action akin to free will more than through teamwork or by following others.