05 16 is the telephone area code of Xuzhou City, Jiangsu Province. The area codes of Gulou, Yunlong, Jiawang, Quanshan, Fengxian, Peixian, Tongshan, Suining, Xinyi and Pizhou in Xuzhou are all 05 16.

For domestic long-distance calls in Xuzhou, if the caller is a mobile phone or plane, add Xuzhou long-distance call area code 0516 before the other party's phone number; To make an overseas call to Xuzhou from abroad, you must add China's country area code 0086, Xuzhou's area code 5 16 (excluding the first 0) and the other party's mobile phone or plane phone number before the other party's phone number.