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 Oman in 2011

The 2011 issuing programme is not available.
  1. Om001.11-80
    Wns Number
    OM001.11
    Country / Post
    Oman
    Date of Issue
    November 18, 2011
    Subject
    41st National Day - Royal Opera House - Muscat
  2. Om002.11-80
    Wns Number
    OM002.11
    Country / Post
    Oman
    Date of Issue
    November 18, 2011
    Subject
    41st National Day - Royal Opera House - Muscat
  3. Om003.11-80
    Wns Number
    OM003.11
    Country / Post
    Oman
    Date of Issue
    November 18, 2011
    Subject
    41st National Day - Royal Opera House - Muscat
  4. Om004.11-80
    Wns Number
    OM004.11
    Country / Post
    Oman
    Date of Issue
    November 19, 2011
    Subject
    Silver Jubilee of Sultan Qaboos University
  5. Om005.11-80
    Wns Number
    OM005.11
    Country / Post
    Oman
    Date of Issue
    November 19, 2011
    Subject
    Silver Jubilee of Sultan Qaboos University
  6. Om006.11-80
    Wns Number
    OM006.11
    Country / Post
    Oman
    Date of Issue
    December 27, 2011
    Subject
    International Year of Chemistry

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