World's largest society for aerophilately and provides many services for the aerophilatelic.

Non commercial organization devoted to the advancement of First Day Cover collecting.

Organisation providing news, history, publications and information for collectors of the plate number single and other marginal markings. Includes examples of U.S. plate number singles.

Contact site with basic information on collecting and joining the group.

The club's online contact point with basic information.

Collectors create and send envelopes with drawn or printed images.

Group welcomes worldwide collectors of the island's postage issues. Short information on the society.

Philately and postal history of Australia and its states.

Group studies covers bearing notifications of problems or special services.

Association for collectors of Confederate issues and postal history offers a quarterly journal, expertizing services, and sales circuits.