W$3$C does not have a single physical headquarters. There are institutions, however, that "host" W$3$C$.$ They are $($check all that apply$)$:

Keio University $($near Tokyo, Japan$)$

MIT $($in Cambridge, MA$,$ USA$)$

ERCIM $($in Sophia$-$Antipolis, France$)$

Oxford University $($in Oxford, England$)$

Beihang University $($in Beijing, China$)$