This study aims to investigate the utilization of Social Networking Sites for Language learning (SNSLL) in building undergraduate student’s Intercultural Communicative Competence (ICC). This study applies autobiographical narrative inquiry methods to present the findings. The data of this study are based on the researcher’s diary before, during, and after the learning process and supported by artifacts in the CCU course. The results indicated that the utilization of SNSLL in the learning process gains the researcher’s establishment of ICC. After learning cultures and languages through SNSLL, the researcher reflects on herself. The researcher discusses how SNSLL can facilitate and support her as an EFL undergraduate student in building ICC. SNSLL provides convenience to develop a positive attitude toward learning, interpersonal intelligence, and cultural awareness. Moreover, through the learning activities in CCU class, finding intercultural friends through SNSLL and providing specific topics can build various activities based on intercultural learning approaches obtained from the communication process to discussion and reflection. The result also shows that the researcher achieved several elements of ICC from Byram's 1997 model. This study has implications that SNSLL can be utilized in language and cross-cultural learning to establish the EFL undergraduate students’ ICC.