İstanbul Büyükşehir Belediyespor (. . .
İstanbul Büyükşehir Belediyespor, shortly İstanbul BBSK or İBBSK, are the men's volleyball department of İstanbul Büyükşehir Belediyespor, a multi-sport club based in Istanbul, Turkey. The team currently play in the Turkish Men's Volleyball League.