I keep getting wrong number calls. I thought it was weird when almost all of them thought they were calling the same place. Then I realized it's because of a number similarity, and peoples' inability to dial a 1 before a long distance number.
So there's this big company, a really big one. I won't mention which here because then you could find my phone number, which I don't want on the internet publicly. On their site, they list a phone number with the address to their main office. Let's say this number is 123-456-7890. My phone number is 555-123-4567. So when you leave out the 1 for long distance, the system ignores the last 3 digits, and thinks you're dialing 123-4567. I guess it's at least not the actual support number. The calls I get are from people looking for support, but because it's the company's main business number, I only get these calls once every couple weeks.