In the Library of Congress call numbers, the countries of the world are divided into regions.
Beginning with the world as a whole and then moving from the Western Hemisphere in North America (Canada and the U.S.A.) to South America, then east to Europe, Asia, Africa and the Pacific.
The call numbers get larger as you go east and south of North America.
Finding Maps by World Region
By Location: Each country, region has its own call number range. Here are a few starting places.
World Maps: G3200
Americas
Europe: G5700
Asia/Middle East
Africa