Board Thread:General Discussion/@comment-43505-20161008233233/@comment-1013969-20161011022252

Lawrence King wrote: There is a long tradition in fandom that (1) Superman appearances from 1938 until the early 1950s are Earth-Two; (2) Superman appearances from the late 1950s until Crisis are Earth-One; (3) all Superboy appearances from 1949 until Crisis are Earth-One. This is not a convention invented by this wiki. Other details have been disputed (e.g., whether the E2 Superman can fly, which 1950s Superman stories are on which Earth), but these three details have been canonical in fandom and among DC writers for decades.

Generally when fandom and ABSCoIE conflict ABSCoIE takes precedence.

Earth-Forty, Earth-116, Earth-134, Earth-172, Earth-300.6, and so on are all Superboy stories that did not take place on Earth-One.