They seem to still be based in Mocow https://yandex.com/company/contacts/moscow/ but do have an office in Tel Aviv https://yandex.com/company/contacts/tel-aviv they also have offices in many other countries such as Belarus, Czech Republic, China, USA and a few others so who knows? All I know is that I can actually find stuff that I'm looking for when I use their site, I found an excellent recipe for cream of broccoli soup today that turned out delicious.