Three Asian universities made the top 30 for the first time in an influential ranking of the world's top 1,000 institutions released Tuesday.

The National University of Singapore moved up two places from last year to tie at No. 22 — its best ranking to date — while China's Peking University climbed two spots to tie at No. 27 and Tsinghua University jumped five spots to reach No. 30, according to the Times Higher Education World University Rankings.

Britain's Oxford University once again topped the list, now in its 14th year, with the University of Cambridge at No. 2 for the first time. The California Institute of Technology and Stanford University tied at No. 3.