So I monitor 121.5 when flying on com 2. Heard something a little different today. It went something like this. "Anchorage center Alaska Flight xxx on Guard 121.5" "Can't pick up anchorage center on XXX.XX, is there another frequency?" It was a strange request on a frequency I did not expect that type of communication. Is 121.5 (Guard) used as an information frequency at flight levels?