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 Sudan in 2011

The 2011 issuing programme is not available.
  1. Sd001.11-80
    Wns Number
    SD001.11
    Country / Post
    Sudan
    Date of Issue
    July 27, 2011
    Subject
    Sudan e.Government
  2. Sd002.11-80
    Wns Number
    SD002.11
    Country / Post
    Sudan
    Date of Issue
    July 27, 2011
    Subject
    Sudan e.Government
  3. Sd003.11-80
    Wns Number
    SD003.11
    Country / Post
    Sudan
    Date of Issue
    July 27, 2011
    Subject
    Sudan e.Government