Canada
NATIONAL PHILATELIC CENTRE
CANADA POST
75 ST NINIAN ST
ANTIGONISH NS B2G 2R8
http://www.canadapost.ca/shop/collecting/collecting.jsf
Mexico
Departamento de Promoción Filatélica,
Palacio Postal, Tacuba 1,
Mexico 1, Mexico
http://www.sepomex.gob.mx/
United Nations
United Nations Postal Administration
P.O. Box 5900, Grand Central Station
New York, N.Y. 10163-5900
http://unstamps.un.org/UNPACommerce/en/index.jsp
United States of America
https://shop.usps.com/webapp/wcs/stores/servlet/TopCategoriesDisplay?storeId=10052&catalogId=10001
We have a separate page for
European Philatelic Agencies and
Latin American Philatelic Agencies.
Of interest:
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