10 - 10 International Club

[Polar Bear]

From time to time I hear a 10 - 10 contest on 10 meters ssb phone.

In the old days, 10 - 10 club was free, now they charge a fee to join.

Sometimes just for the fun of it, I go ahead and give them my zip code as my 10 - 10 number.

Its comical because they just don't get it.  Some people will come right back to me and say - that isn't your number.  I'm like - who cares?

I hear people on the cb radio using numbers, and I wonder are those numbers self assigned or is there some type of club that they join that assigns them their number..