56 selected
- Abkhasia
- Abkhasia - Illegal Stamps
- Abu Dhabi
- Aden
- Afars and Issas
- Afghanistan
- Afghanistan - Illegal Stamps
- Aitutaki
- Ajman
- Ajman - Illegal Stamps
- Ajman - Manama
- Aland (Åland)
- Aland - Jul Stamps (Åland - Jul stamps)
- Alawite State
- Albania
- Albania - Cinderella
- Albania - Korçë
- Alderney
- Alexandretta
- Alexandria
- Algeria
- Allenstein
- Allied Occupation - Germany
- Allied Occupation - Germany [American and british zone]
- Allied Occupation - Germany [French zone]
- Allied Occupation - Germany [Soviet zone]
- Allied Occupation - Italy
- Andorra - French
- Andorra - Spanish
- Angola
- Angola - Illegal Stamps
- Angra
- Anguilla
- Anjouan
- Annam & Tonkin
- Antigua
- Antigua and Barbuda
- Antigua and Barbuda - Redonda
- Argentina
- Armenia
- Aruba
- Ascension Island
- Australia
- Australia - Hutt River - Cinderella
- Australian Antarctic Territory
- Austria
- Austria - Local post
- Austria-Hungary - Bosnia and Herzegovina
- Austria-Hungary - Military mail
- Austria-Hungary - Military mail Italy
- Austria-Hungary - Military mail Montenegro
- Austria-Hungary - Military mail Romania
- Austria-Hungary - Military mail Serbia
- Azerbaijan
- Azerbaijan - Nakhchivan - Illegal Stamps
- Azores
- Not filled in