KBS World Radio is the international public service; TBS eFM and Radio Seoul Korea are English/Korean international and city-facing mixes. K-pop radio in the narrow sense is not the whole story here — you also get news, language programming, and expat-oriented FM. KBS World is the official international door.
These are the South Korea stations currently wired into the 369.FM player. Names and short descriptions are editorial, written so you can tell news from pop before you press play.
Open the 369.FM homepage, search for a station name above, and use the bottom player. Streams belong to the broadcasters. If one fails, try another from the same country or tell us.