About Us
LangSen is a Hong Kong-based international communication company which founded in 2013 under the law of Hong Kong. With...
Services and products
1.IDD Overview
IDD is Langsen termination service for international fixed and mobile voice operators.
Offer TDM and IP...
Contact Us
Address: Unit C, 9/F, MG Tower, No. 133 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong.
Beijing Office: Building 2, No.19 ...
