ROKiT Williams Racing recruit Nicholas Latifi will race in his maiden season of F1 with #6, the number previously used by 2016 world champion Nico Rosberg.
Since 2014, Grand Prix drivers have been allowed to choose their personal race number for the entire duration of their career in F1.
But when a driver retires, their specific number is discarded for two years, after which it can be re-allocated to another participant.
Drivers obviously choose their number for a variety of personal reasons. Lewis Hamilton's trademark #44 goes all the way back to his early karting days, while Mercedes teammate Valtteri Bottas selected #77 for its visual integration into the name 'BO77AS'.
In a video posted by Williams on Twitter, Latifi gave the lowdown on #6.
"I'm sure you're all wondering what number I've decided to choose for the upcoming Formula 1 season," said the 24-year-old Canadian rookie.
"I decided to choose number six. The reason I chose this is because I'm from Toronto, and Toronto is known as 'The Six', basically, because if you're from there, your area code for your phone number is either 416 or 617.
"It's a bit silly, but it kind of stuck, so I decided to choose that."
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Oscar Piastri has discovered an unexpected downside to a season spent away from Formula 1's…
Oliver Bearman is ready to put some distance between himself and Formula 1 after a…
Lance Stroll’s 2026 campaign has become a frustrating sequence of mechanical setbacks. The Canadian’s Sao…
Maria Teresa de Filippis - motorsport's first female F1 Grand Prix driver - was born…
Daniel Ricciardo has never been short of admiration for Max Verstappen, but the retired Australian…
David Coulthard admires Lando Norris’s ability to thread a Formula 1 car through treacherous conditions…