저도 전화 받았는데, 스캠 아닙니다.
https://2020census.gov/en/ways-to-respond/responding-by-phone.html
Calls From the Census Bureau
In addition to requesting a callback before you respond, after you have responded to the 2020 Census you may receive a short call from the Census Bureau to the number you provided, beginning April 22, 2020.