I could be wrong, but I think that was what the convention was in the US at least.
Similar to how there is nothing “stopping” a web server from having a 192.168.x.x address, but we have a standard that blocks off those addresses to be used inside of your own network.
I remember the coax cable but did not know about channel 3 being local communication. I thought it was just convention.
Thanks for teaching me.
I could be wrong, but I think that was what the convention was in the US at least.
Similar to how there is nothing “stopping” a web server from having a 192.168.x.x address, but we have a standard that blocks off those addresses to be used inside of your own network.