| Place | Post Code |
|---|---|
| 红古区 (Honggu, Lanzhou) | 730080, 730088 |
| 王家口村 (Wangjiakou, Lanzhou) | 730085 |
| 旋子村 (Xuanzi, Lanzhou) | 730085 |
| Postal Codes in Honggu | |
|---|---|
| Haishi (海石镇) | |
| Haishiwan (海石湾镇) | |
| Honggu (红古乡) | |
| Huacun (花庄镇) | |
| Hualong (华龙街道) | |
| Kuangqu (矿区街道) | |
| Pingan (平安镇) | |
| Xiayao (下窑街道) | |
| Yaojie (窑街镇) | |