24 (from 5 confederations) were the number of teams who competed in US Open . The venue for US Open was Galatsi Olympic Hall (rhythmic),Pauley Pavilion,New York City, New York,,United States . The official site of US Open is chicagomarathon.com . 7–19 February was when it was held . 116 from 13 nations were the competitors in US Open . 1871; 148 years ago (1871) is when US Open was founded 
The sport US Open has 122 contenders  from more than 31 nations