I remember around 20 years ago, I was working for a small consulting firm here in Jacksonville, that housed servers for small businesses, in the “upgraded” facility, a/c, security, power, etc.
Back then we had an entire class C /24 address space of public IP addresses, someone wanted to run their own email server, web server, etc., and need a public IP address, we provided that for a monthly cost, we setup a DNS server that hosted their records if necessary.
That’s why I was curious what AWS wasn’t charging up until for that service.
I worked for GE in the late 90s, and they had a class A. I wonder if they kept it, or monetized it? I bet the latter.