Rollfast is a brand made by Snyder, Mr. Columbia is an excellent page that shows up from time to time, it's gone again, but here's a list of numbers that matches what I have: https://www.cardiffbikeshop.com/datecodes/columbia.htm
Firestone was a brand made by different manufacturers.
I write them down in a book of index cards as I find data that seems to be good. Some of the data is from 10 years or more ago, so I don't know exactly where I found it, but it's usually good if I saved it. I update it all as newer data or better data is found.