XIY Xi an XMN Xiamen XFN Xiangfan XIC Xichang XIL Xilinhot XNN Xining XUZ Xuzhou YNZ Yancheng RGN Yangon YNJ Yanji YNT Yantai NSI Yaounde YAP Yap SVX Yekaterinburg YZF Yellowknife RSU Yeosu EVN Yerevan YBP Yibin YIH Yichang INC Yinchuan YGJ Yonago YUM Yuma YCU Yun Cheng UUS Yuzhno-Sakhalinsk ZAD Zadar ZAG Zagreb ZTH Zakinthos Island ZHA Zhanjiang CGO Zhengzhou ZUH Zhuhai ZRH Zurich