500100 市辖区,500101 万州区,500102 涪陵区,500103 渝中区,500104 大渡口区,500105 江北区,500106 沙坪坝区,500107 九龙坡区,500108 南岸区,500109 北碚区,500110 万盛区
500102
是以500102开头的