diff --git a/isp.md b/isp.md
index 0e573114..8b28115e 100644
--- a/isp.md
+++ b/isp.md
@@ -58,4 +58,12 @@ Most of non business IP provided by ISP are blacklisted.
 | Swisscom | Multiple | No | Yes | No | No | No |
 | VTX | Multiple | No | Yes | No | - | - |
 
+### South Korea
+
+| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
+| --- | --- | --- | --- | --- | --- | --- |
+| LG U+ (HelloVision) | Multiple | Yes | Yes (Without ISP Router) | No | - | Partial |
+| KT(SkyLife, Qook&Show) | Multiple | Yes | Yes | No | - | Partial |
+| SKT (SK Broadband) | Multiple | Yes | Yes | No | - | Partial |
+
 If you want to add international ISPs information, please do consider [modifying this page](/write_documentation).