- Ttt Communication Co., Ltd.
- Address:
- Deestone International Co., Ltd
- Address:4 Moo 7 Banglane-kohrat Rd
- Samart Engineering Co Ltd
- Address:59 Moo 2 Phaholyothin Road
- LeSiam Internetwork Co.,Ltd.
- Address:45/46 Moo.5 Watchalaw
- A. L. T. Inter Corporation Co., Ltd.
- Address:52 / 1 Moo. 5, Bangkruay-Sainoi Rd. , Bangsithong, Bangkruay, Nonthaburi 11130 Thailand.
- Telecom E Co.,Ltd
- Address:Rama 9 Road
1