www.correos.gob.sv
El Salvador EMS Tracking  ShippingExchange
https://shippingexchange.com/tracktrace/el_salvador_post/ems
El Salvador  EMS  Express Mail Service
www.ems.post/operators/elsalvador
http://www.cosycommunications.com/EMS.htm
Post/EMS tracking  tracktrace
www.tracktrace.com/post
How to calculate volumetric weight of Parcels :
Calculate Parcel Length x Breadth x Depth in Centimeters and divide it by 6000
(Note: Some Courier Companies have currently started dividing by 5000.)
or
Calculate Parcel Length x Breadth x Depth in inches and divide it by 366 .
