This is the telephone area code for Osan, a city in Gyeonggi Province known for its major air force base, South Korea.
How to Call Osan from Overseas
- Dial your country's exit code (International Access Code)
- Dial 82 (South Korea country code)
- Dial the area code (31 - without the leading 0)
- Dial the local phone number (7-8 digits)
Example: Calling Osan from Brazil
00 82 31 678 9012
Where:
00 = Brazil exit code
82 = South Korea country code
31 = Osan area code (031 without the 0)
678 9012 = Local Osan phone number
Quick Facts
Osan Area Code Coverage
The 031 area code covers Osan and surrounding areas in southern Gyeonggi Province:
Osan City Center
Downtown Osan, Commercial district
Osan Air Base
Major US Air Force base area
Osan Station
Railway station area, Transportation hub
Seoul National University
SNU Hospital area, Medical district
Industrial Complex
Osan industrial area, Manufacturing district
Residential Areas
Various housing developments, Suburban neighborhoods
Major South Korean Area Codes
Common Exit Codes for Calling South Korea
When calling Osan from these countries, use these exit codes:
United States
011
Australia
0011
European Union
00
Japan
010
China
00
Canada
011