737128 is the PIN Code of Sumbuk, which is located in South Sikkim district, Sikkim state.
Sumbuk Post Office is located at Sumbuk, South 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 Sumbuk PO is 737128. This Postoffice falls under Sikkim postal division of the West Bengal postal circle.