Just some closure for the folks who are no doubt staying awake wondering what XNY 556 refers to. There was a Canadian TV show in the early to mid 60's called The Forest Rangers. A group of kids thwarting crime and protecting the environment from their headquarters in an old fort. XNY 556 were the call letters for their radio. Quite a good show as I recall, with a jaunty, whistle-able theme song. "XNY five-five-six. Chubb, this is Mike. Do you read me? Joe Two Rivers will meet us at the RCMP detachment. Over and Out."

Ah, the olden days.
Bardford