• [+] Postal codes by country (4)
• [+] Postage stamps by country (9)

A

• [+] Postal system of Australia (1)

C

• [+] Canada Post (2)

H

• [+] Postal system of Hong Kong (1)

I

• [+] Postal system of India (1)
• [+] Republic of Ireland postal system (0)

J

• [+] Postal system of Japan (0)

S

• [+] Postal system of Singapore (0)

U

• [+] Postal system of the United Kingdom (2)
• [+] United States Postal Service (5)

A

• Postal services in Andorra

C

• Postage stamps and postal history of the Canal Zone
• Postal codes in China

D

• Deutsche Bundespost
• Deutsche Bundespost Berlin
• Deutsche Post of the GDR

F

• La Poste (France)

I

• Íslandspóstur
• Iraqi Post

K

• Kenya Posts and Telecommunications Corporation

L

• Letter monopoly

M

• Magyar Posta
• Postage stamps and postal history of Morocco

N

• Postcodes in New Zealand
• Nigerian Postal Service

P

• Postal addresses in the Philippines
• Poczta Polska
• Post office

S

• Swiss Post

V

• Philatelic and Numismatic Office of the Vatican City State