Sandan-ro 20beon-gil, Wonsi-dong, Danwon-gu, Ansan-si postal codes (14)
All 14 buildings on Sandan-ro 20beon-gil in Wonsi-dong, Danwon-gu, Ansan-si use postal code 15612. Data as of August 2026.
| Address | Postal code | Building |
|---|---|---|
| Sandan-ro 20beon-gil 21-3 | 15612 | 삼원산업(주) |
| Sandan-ro 20beon-gil 21-7 | 15612 | |
| Sandan-ro 20beon-gil 21-13 | 15612 | |
| Sandan-ro 20beon-gil 21-14 | 15612 | 동일에프엔지(주) |
| Sandan-ro 20beon-gil 21-17 | 15612 | |
| Sandan-ro 20beon-gil 21-18 | 15612 | |
| Sandan-ro 20beon-gil 22 | 15612 | (주)오리온 |
| Sandan-ro 20beon-gil 31 | 15612 | |
| Sandan-ro 20beon-gil 41 | 15612 | |
| Sandan-ro 20beon-gil 43 | 15612 | |
| Sandan-ro 20beon-gil 49 | 15612 | |
| Sandan-ro 20beon-gil 53-5 | 15612 | |
| Sandan-ro 20beon-gil 53-9 | 15612 | |
| Sandan-ro 20beon-gil 53-13 | 15612 | 이도정공 |