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Hanaro Telecom, Inc.
Telephone and broadband internet connection service provider, with web and mail hosting and internet roaming. [Korean, English]
Korea Telecom
Corporate profile and information about employment and services. [Korean, English, Chinese]
Korea Telephone Directory
Directory publishing firm, also a subsidiary of Korea Telecom. [Korean, English]
KTF
Provides mobile communications services. [Korean, English, Chinese]
KTNetworks
Provides telecommunications network service and consulting for corporations, broadband internet connection services and discounted phone service. Branch offices nationwide. [Korean, English]
LG TeleCom
PCS service provider. Available services, investment information, and guide for foreigners. [Korean, English]
SK Telecom
Mobile phone service provider, also conducts research and development. [Korean, English, Chinese]