The tail number (registration number) is not usually the same as the flight number.
The tail number is for identification, in this case it would begin with a C seeing as it is from canada, followed by 4 or five other letters / digits.
The flight number usually corresponds to the aircraft operators name.. ie each flight will start with an anacronym and then have a flight number.. eg British airways flight 001 would be BA001
easyjet flights are designated EZY, etc etc..
There's a chance that Vertigo would be coded VGO or U2 I suppose, but I doubt every plane that lands at every airport is logged publically. (freight planes wouldnt)