After the guide download, most of those oddball INFO channels disappeared. I still see 421 and 437, though.Interesting uplink report today: Uplink Activity Updates » Blog Archive » 9/25/19 at 3:15pm ET (v28) – 185 changes seen
After these changes, the old FSN channel numbers now have information in the guide (at least for the HD feed) for the current and next program, even though the channels are still labeled as INFO. There are also (standard-def) INFO channels outside the 412-xx collapsible channel range for some of these channels (415, 420, 421, 430, and 437)