737131 is the PIN Code of South Regu, which is located in East Sikkim district, Sikkim state.
South Regu Post Office is located at South Regu, East Sikkim of SIKKIM state. It is a Branch Post Office. A Post Office (PO) / Dak Ghar is a facility in charge of sorting, processing, and delivering mail to recipients. POs are usually regulated and funded by the Government of India (GOI). Pin code of South Regu PO is 737131. This Postoffice falls under Sikkim postal division of the West Bengal postal circle.