What is Umart's Australian Business Number (ABN)? Grant May 30, 2017 03:28 Follow Umart's ABN is 74 076 486 416. This can also be found at the top of all of our receipts. Related articles How do i change the Billing Address on my account? What is your Returns policy? What are Umart's opening hours? What does 24-48hrs mean? What is Umart Online's Phone Number?