Jokes that, nowadays, need explaining

What was the purpose of stating numbers that way? Were they standard (Greenfield would be 4-7, but Irritating or Island or others would work as well)? You could make editorial comments about people “Give Bob a call. His number is…ASswipe 9-2032.”

I understand when a company wants a particular number, like 1-800-FLOWERS because that’s easy to remember and they’re trying to give customers a number they don’t even have to write down.