Around the world the country code and area code (including the Chinese provinces, municipalities) Book Query Tool:

Telephone code inquiry all over the world:
http://www.chinamallonline.net/phonecard_c...ttimeout=1000&r=135 (navigation bar "Tools")

http://www.firstphonecard.com/phonecardInf...1&CountryID=1&r=135 (at the top of Country code)

Telephone code inquiry around the world: (country / domain name initials / country code / time difference - the list)
http://www.chinamallonline.net/phonecard_c...ttimeout=1000&r=135 (navigation bar "Tools")

China's domestic phone code query:
http://www.chinamallonline.net/phonecard_c...ttimeout=1000&r=135 (navigation bar "Tools")