The first two digits represent a large area, and 0 1 to 09 refers to the Seoul Special City area.
When the old address was adopted in the past, the postal code 03080 covered the following 10 addresses: 28-2, 28-2 1, 28-22, 28-28, 28-33,1/kloc-0.
After the implementation of the new address, zip code 03080 refers to these two addresses: Daxue Road 10 1 and 103 in Jongno-ku, Seoul.