Although not AC specific, it is Canadian so where else would i put this?
It's probably in or going to be in the news but here it is on a small news website:
Daily Hive
"According to the Canadian Trademarks Database, In addition to YYZ, the company has also trademarked “The 6,” airport codes for Calgary (YYC) and Montreal (YUL), along with area codes including 416, 905, 604, 403, and 514."