STD Code, Phone Code, or Telephone Code Finder Tool
Mariang Std Code
Mariang STD Code is 03657, STD is known as Subscriber Trunk dialling or Subscriber Toll Dialing. If you are in other city or some different location and you would like to make a Telephone call, then you require STD Code of that location so dial STD Code first then Telephone number it will connect immediately.
If you try without STD Code, then you won't be able to connect that number. If you are in the same city or location, then you do not need to dial the STD Code before Telephone Number.