Ruta de autobús 121 (Rostov-na-Donu - Krym) en el mapa de Rostov-on-Don

Rostov-na-Donu (Budennovskiy prospekt - Tselinogradskaya ulitsa (tuda) - Stadionnaya ulitsa - ulitsa Sheboldaeva - ulitsa Larina (tuda) - ulitsa Nemirovicha-Danchenko (obratno: ulitsa Sheboldaeva) - ulitsa Vavilova - (obratno: Dachnaya ulitsa - ulitsa 56-y Armii - Dachnaya ulitsa) - Taganrogskaya ulitsa) - s/t "Fakel" - Chaltyr' (Rostovskaya ulitsa - ulitsa Myasnikyana - ulitsa 3-ya Liniya - Vostochnaya ulitsa - ulitsa 5-ya Liniya - ulitsa Novostroek - ulitsa 6-ya Liniya) - Krym (Sotsialisticheskaya ulitsa - ulitsa 11-ya Liniya - ulitsa 9-ya Liniya - ulitsa 8-ya Liniya)