I am looking for unlicensed frequency ranges in Korea for wireless LAN
transmissions.  The frequencies I am looking for are the equivalent of
the ISM (900 Mhz, 2.4 Ghz, 5.8 Ghz) and UNII bands that the FCC
provides in the US.

Please provide me this information and/or a link to a source
discussing Korea's unlicensed frequency ranges for wireless lans.

I believe this is the information you are looking for. I did not post
it as an answer, because Korea, I believe, only has one unlicensed
frequency range, 5.725 - 5.825 Ghz, and is considering 5.850.
(although they do make use of other ranges)


WorldWide Progress for Wireless Lans(Page 9)
http://www.atheros.com/pt/Atheros_Regulatory_whitepaper.pdf


Please let me know if this is indeed the type of information you are
requesting. Thanks in advance -

SgtCory