South Korea Postal Code 37406 Boundary Map
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| Postal Code | 37406 |
| Postal Code Name | Cheongsong-gun |
| Province | Gyeongsangbuk-do |
| County | Cheongsong-gun |
| Timezone | Korean Standard Time (KST) |
| Adjacent Postal Codes | 37400 37401 37405 37407 37408 37409 |