Perhaps not standard. But maybe service-provider-specific. Since our family is using Verizon phones, I'm actually only interested in Verizion. I just keep discovering little things here and there that say stuff like "oh, to do that, you press star-blah-blah-blah", but it's only ever in answer to a specific question. No where have I seen a canonical list of star-whatever codes.

The GSM codes list is interesting, but I don't think we have GSM phones. Not sure.