Austin Alan Rochez (b. September 2, 1996), popularly known as 645AR, is a rapper from Atlanta, Georgia.

Born in the Bronx in New York City, NY, he moved to the South when he was 11, first to Florida and then to Atlanta. Regarding his stage name, he told Complex: “645 is for the building I grew up in in The Bronx. Jackson Ave, 645. The AR is for my government name, which I can’t tell you.”

He is known for his “squeaking” style of rap music, in which he uses a high and squeaky pitch in his delivery. This is most notably documented on his biggest hit to date, “4 Da Trap.” He says this style was discovered while messing around in a studio session in 2018.

He started his rap career in 2017, and has released 17 projects since then, while the squeaking delivery is only seen in his recent work.