- Netcomin System Inc.
- Address:Netcomin BD, 24-5, Samsung-Dong, Kangnam-Gu
- CT Electronics
- Address:Buchon Techno-Park 101-703 #364 SamJung
- E&C Communications Co.,Ltd.
- Address:Rm206 AceTechno Tower, Guro-dong
- Youngsan Glonet Corp.
- Address:# 1108 East Wing, Hanshin Intervalley 24
- SEOUL TELCOM CO LTD
- Address:28-3, Goean-dong, Sosa-gu
- Silicon General, Inc.
- Address:512 Kumho, 280-4 Seohyun, Bundang
- C&S Technology Inc
- Address:C&S Venture B/D, 221-2 Nonhyundong, Kangnamku,
- FIBERPIA CO LTD
- Address:702 Tamnip-Dong Yuseong-Gu
- TOBNET Co., Ltd.
- Address:# 1063-10, Hogye-dong, Dongan-gu,
- Nedec Co., Ltd.
- Address:119-12 Dunjeon-ri,Geumeo-ri ,Pogok-myeon ,Yongin-si
- Hantel Co.,Ltd.
- Address:513-15,Sangdaewon-dong ,Jungwon-gu, Seongnam-si
- CELECOM MICROWAVE INC
- Address:72-2 Sikkum-ri, Yangji-myeon
- Ace Technology Corp.
- Address:727-5,Gojan-dong ,Namdong-gu
- KGE
- Address:
- YM CORP
- Address:476-9, Boseong B/D 3F, Simgok Dong, Won-mi Ku, Bucheon City, Kyungki-Do, South Korea (Postal Code: 420-829)
- Philko International, Inc.
- Address:905-5,Jakjeon-dong ,Gyeyang-gu
- Hankook Antenna Co., Ltd.
- Address:239-9 DODANG-DONG,WONMI-GU,BUCHEON-SI,GYUNGGI-DO,KOREA(420-807)
- Spire Technology Inc.
- Address:4Fl. JVM Building, 67-6, YangJaeDong
- Nextlink Co., Ltd.
- Address:c 606-2, Bundang TechnoPark ,145, Yatap-dong, Bundang-gu, Seongnam-si
- Orient Lux
- Address:Shin Han B / D, 775 Shin Dang 1 Dong, Chung Gu, Seoul