cau

California

-cn

Canada

cb

Cambodia

cou

Colorado

cc

China

-cp

Canton and Enderbury Islands

cd

Chad

cq

Comoros

ce

Sri Lanka

cr

Costa Rica

cf

Congo (Brazzaville)

-cs

Czechoslovakia

cg

Congo (Democratic Republic)

ctu

Connecticut

ch

China (Republic : 1949- )

cu

Cuba

ci

Croatia

cv

Cape Verde

cj

Cayman Islands

cw

Cook Islands

ck

Colombia

cx

Central African Republic

cl

Chile

cy

Cyprus

cm

Cameroon

-cz

Canal Zone