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.

All registered stamps issued by Colombia in 2010

The 2010 issuing programme is not available.
  1. Co111.10-80
    Wns Number
    CO111.10
    Country / Post
    Colombia
    Date of Issue
    November 30, 2010
    Subject
    Christmas 2010
  2. Co112.10-80
    Wns Number
    CO112.10
    Country / Post
    Colombia
    Date of Issue
    December 12, 2010
    Subject
    Eduardo Caballero Calderon (1910-1993)