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 Bulgaria in 2011

The 2011 issuing programme is not available.
  1. Bg001.11-80
    Wns Number
    BG001.11
    Country / Post
    Bulgaria
    Date of Issue
    January 07, 2011
    Subject
    Antarctica
  2. Bg002.11-80
    Wns Number
    BG002.11
    Country / Post
    Bulgaria
    Date of Issue
    January 24, 2011
    Subject
    125 Years since the formation of the 9th Plovdiv Regiment
  3. Bg003.11-80
    Wns Number
    BG003.11
    Country / Post
    Bulgaria
    Date of Issue
    January 31, 2011
    Subject
    Birth Centenary of Vanga
  4. Bg004.11-80
    Wns Number
    BG004.11
    Country / Post
    Bulgaria
    Date of Issue
    April 01, 2011
    Subject
    The Day of Humour and Joke - 35 Years since the Discovery of the Tiny Planet of Gabrovo
  5. Bg005.11-80
    Wns Number
    BG005.11
    Country / Post
    Bulgaria
    Date of Issue
    April 11, 2011
    Subject
    20 Years Atlantic Club in Bulgaria
  6. Bg006.11-80
    Wns Number
    BG006.11
    Country / Post
    Bulgaria
    Date of Issue
    April 12, 2011
    Subject
    50th Anniversary of Yuri Gagarin's Space Flight and the Launch of the First Spacecraft to Venus
  7. Bg007.11-80
    Wns Number
    BG007.11
    Country / Post
    Bulgaria
    Date of Issue
    April 12, 2011
    Subject
    50th Anniversary of Yuri Gagarin's Space Flight and the Launch of the First Spececraft to Venus
  8. Bg008.11-80
    Wns Number
    BG008.11
    Country / Post
    Bulgaria
    Date of Issue
    April 28, 2011
    Subject
    Europa 2011 - Year of Forests
  9. Bg009.11-80
    Wns Number
    BG009.11
    Country / Post
    Bulgaria
    Date of Issue
    April 28, 2011
    Subject
    Europa 2011 - Year of Forests
  10. Bg010.11-80
    Wns Number
    BG010.11
    Country / Post
    Bulgaria
    Date of Issue
    April 30, 2011
    Subject
    1700th Anniversary of the Serdica Edict of Religious Tolerance issued by Emporer Gallius