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Telephone numbers in South Korea are organized and assigned using the following scheme
 | This article needs additional citations for verification. (September 2019) |
| Location | |
|---|---|
| Country | South Korea |
| Continent | Asia |
| Regulator | Ministry of Science and ICT |
| Type | closed |
| NSN length | 8, 9, 10 |
| Format | 0XX-XXX-XXXX 0XX-XXXX-XXXX |
| Access codes | |
| Country code | +82 |
| International access | 00xyy (where xyy is the international carrier selection code) |
| Long-distance | 0 |
- International call out: 00N (where N is the carrier code) followed by the distant country code and telephone number.
- Calling into Korea: +82 XX XXXX YYYY. The leading "0" is dropped when dialling into South Korea from abroad.
- Some 1566/1577/1588 telephone numbers cannot be dialed from abroad.
- Domestic long-distance call: 0NN (where NN is the carrier code) followed by the 0XX area code and XXXX YYYY number. See Domestic long-distance service code and Area code.
- Call to cellular : 01N XXXX YYYY (see Mobile phone number). When phone call is made between unified 010-number subscribers, leading 010 can be dropped (XXXX YYYY).
- Special service call : 0N0 XXXX YYYY (see Special service)
For example;
- Call 02-312-3456 within Seoul: 312-3456
- Call 02-312-3456 from elsewhere: 02-312-3456
- Call 051-212-3456 within Busan: 212-3456
- Call 051-212-3456 from elsewhere: 051-212-3456
- Call 02-312-3456 from abroad: +82-2-312-3456
South Korea uses an open dialing plan with a total length (including 0) of 9 to 11 digits and, within city, subscriber numbers 7 to 8 digits long. Dialing from mobile phones to any type of phone except 010 numbers, the area code must be included.
In 1998, telephone numbers in Seoul starting with 2 and 6 added more digit (02-2XX-YYYY to 02-22XX-YYYY, 02-6XX-YYYY to 02-26XX-YYYY). Before area codes were shortened from 4 digit to 2~3 digit in June 2000, there were 1 digit exchange number (usually "2") with some 2 digit exchange numbers so some phone numbers like 0347-61-XXXX, 0443-2-XXXX or 0525-40-XXXX existed. (now 031-761-XXXX, 043-652-XXXX and 055-340-XXXX)
International call carrier codes
- 001 - KT international call
- 002 - LG U+ international call
- 003xx - International call over Internet Protocol or international special services
- 00365 - Sejong Telecom international call over Internet Protocol
- 005 - SK Broadband international call (Higher quality than the 5 digit prefix service from the same company)
- 006 - SK Telink international call (Higher quality than the 5 digit prefix service from the same company)
- 007xx - International call over Internet Protocol or international special services
- 00700 - SK Telink international call over Internet Protocol
- 00727 - KT international call over Internet Protocol
- 00766 - SK Broadband international call over Internet Protocol
- 00794 - Operator Service
- 008 - Sejong Telecom international call (Higher quality than the 5 digit prefix service from the same company)
Mobile prefixes
- 010 - Mobile (All South Korea Mobile Phone Companies, from Jan 1, 2004)
- 0100 - Satellite phone (Globalstar)
- 011 - Mobile (SK Telecom, until Dec 31, 2003)(All South Korea Mobile Phone Companies, from Jan 1, 2004)
- 012 - Machine to machine (Former Beeper)
- 013xx - Mobile special net (wireless vessels etc.)
- 014xx - Point-to-Point Protocol Access number
- 015 - Mobile services: Paging services
- 016 - Mobile (KT, until Jun 30, 2003)(All South Korea Mobile Phone Companies, from Jul 1, 2004)
- 017 - Mobile (SK Telecom, until Dec 31, 2003)(All South Korea Mobile Phone Companies, from Jan 1, 2004)
- 018 - Mobile (KT, until Jun 30, 2003)(All South Korea Mobile Phone Companies, from Jul 1, 2004)
- 019 - Mobile (LG U+, until Dec 31, 2004)(All South Korea Mobile Phone Companies, from Jan 1, 2005)
Services
Area codes
Before June 2000, South Korea used two- to four-digit area codes.
- 02 - Seoul and parts of Gyeonggi-do (Gwacheon, Gwangmyeong and some neighborhoods of Goyang and Hanam)
- 031 - Gyeonggi-do
- 032 - Incheon and parts of Gyeonggi-do (Bucheon and some insular communities of Ansan)
- 033 - Gangwon-do
- 041 - Chungcheongnam-do
- 042 - Daejeon and a part of Chungcheongnam-do (Gyeryong)
- 043 - Chungcheongbuk-do
- 044 - Sejong City
- 049 - Kaesong Industrial Region (No longer available to call)
- 051 - Busan
- 052 - Ulsan
- 053 - Daegu and a part of Gyeongsangbuk-do (Gyeongsan)
- 054 - Gyeongsangbuk-do and a part of Daegu (Gunwi)
- 055 - Gyeongsangnam-do and a few neighborhoods of Ulsan
- 061 - Jeollanam-do
- 062 - Gwangju
- 063 - Jeollabuk-do
- 064 - Jeju-do
Domestic long-distance carrier codes
It is not necessary to dial any carrier prefix before making a domestic long-distance call. These prefixes are needed only when you want to choose a different carrier other than your default long-distance carrier (usually the same company that provides your phoneline).
- 081 - KT
- 082 - LG U+
- 083 - Sejong Telecom
- 084 - SK Broadband
- 085xx - [Domestic long-distance Value Added Service (VAS)]
- 086 - SK Telink
- 087 - (Currently not in use)
- 088 - (Currently not in use)
Special numbers
- 100 - KT customer center
- 101 - LG U+ Home Service customer center
- 102 - President's Office National Proposal
- 106 - SK Broadband customer center
- 107 - Video relay service
- 109 - Suicide Crisis hotline
- 110 - Government Civil Complaint Information Call Center
- 111 - NIS
- 112 - Police
- 113 - Spy reporting
- Area Code + 114 - Directory assistance (Korea Info Service)
- 115 - KT Telegram
- 116 - KT standard time service
- 117 - School Violence Hotline (from 2012, previously: report sexual trafficking of women)
- 118 - Cyber terrorism report
- 119 - Fire brigade, ambulance
- 120 - Lifestyle service
- 121 - Water utility report
- 122 - Coast guard emergency
- 123 - KEPCO electric report
- 125 - Smuggling report
- 126 - National Tax Counseling Center
- 128 - Pollution report
- 129 - Coordination with social welfare service (after October 2005)
- 1300 - Postal services
- 1301 - Narcotics report
- Area Code + 131 - Weather forecasting
- 132 - Civil Action (Korea Legal Aid Corporation - for contract disputes)
- 1330 - KNTO tourist information (bus·train schedule, hotel·inn information, free translation service)
- 1331 - Human Rights Board
- 1332 - Finance Board
- 1333 - Transport information
- 1335 - Information communication service center
- 1336 - Infringement of personal information board
- 1337 - Military Safety Board
- 1338 - Communications service center and report
- 1339 - Emergency medical treatment
- 134 - Tourist information
- 1345 - Immigration Contact Center (multilingual support)
- 1350 - Labor Board
- 1355 - National Pension Service
- 1357 - Small and medium enterprise support
- 1365 - Volunteering information
- 1366 - Domestic abuse report
- 1369 - Financial Information Inquiry
- 1377 - Foodbank
- 1379 - Unreasonable infringement of livelihood report
- 1382 - Citizen Registry Confirmation
- 1385 - Business discomfort report and board
- 1388 - Minor mistreatment report
- 1389 - Elderly abuse hotline and board
- 1390 - Election information and infringement hotline
- 1391 - Baby abuse hotline
- 1398 - Child abuse hotline
- 1399 - Unclean grocery report
- 141 - Contact room (KT)
- 182 - Missing child report hotline
- 188 - National Board of Audit and Inspection
Collect call
Intelligent Network
- 14XXXX
- 14XX-XX - KT nationwide single number toll-free service[1]
- 15XXXXXX
- 1544-XXXX - LG Dacom(LG U+) nationwide single number service
- 1566-XXXX - SK Broadband nationwide single number service
- 1577-XXXX - KT nationwide single number service
- 1588-XXXX - KT nationwide single number service
- 1599-XXXX - SK Telink nationwide single number service
- 16XXXXXX
- 1661-XXXX - LG U+ nationwide single number service
- 1688-XXXX - Sejong Telecom nationwide single number service
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