Postal codes in South Korea

Individual codes were provided for each post office distribution area, using an nnn-nn numeric format (e.g., 120-01 represented Susaek-dong, Seodaemun-gu, Seoul).

Unlike current postal coding provided by administrative districts, the 1970 system was implemented based upon a post office's railroad line; this often led to inconsistencies in post codes relative to their administrative areas.

They were grouped by administrative areas as reflected by district reorganization and highway transportation networks.

New postal codes were subdivided to match each postman's delivery area, taking into account the introduction of automated mail sorting equipment.

Refers to the number of zones published to the general public, such as statistics, firefighting, and mail.

Prefix Ranges It is used for mail, national statistics, fire fighting, schools, police, and elections.