Is a town a town if it has 0 residents?

I came across this town in Missouri called Lead Hill. I did some digging and found out that this little Missouri town has a zip code and an area code. However, according to the 2010 census there are no known residents in this town. The area code for this town is 417 and the zip code is 72643 but who is actually there to use it? https://www.zip-codes.com/zip-code/72643/zip-code-72643.asp