The World Association for the Development of Philately (WADP) and the Universal Postal Union (UPU) jointly conceived and developed the WADP Numbering System - WNS, which was launched on 1 January 2002.
WADP Numbering System (WNS)
© Copyright UPU - WADP
The stamp designs are the property of their respective issuing postal authority.
The issuing postal authorities have allowed the reproduction of the stamps displayed on this website.
There are 75333 registered stamps