Who called from 4081786541

yes they do, and they always hang up! What is the point?

Caller ID:  South San Francisco Bay Area    <-- vague nameless ID is a red flag this a telemarketer / scammer robocall
Caller left no message.

I have blocked this phone number.

Just called, I didn't pick up but I tried looking it up on WhitePages on nothing comes up.

Person on other end of phone insisted I was one of their past customers.  I've never had my furnace worked on by anybody. He kept arguing with me and saying I just don't remember. Told him never to call this number again. He still insisted I was a past customer. He was very rude.

Repeated calls, repeated hangups, Dirtbags.