Country Code:   +40
(+ is the code depending from which continent you are calling)

City Codes:

-use them when in Romania
-when calling from outside Romania, except the nule (0) from the begining of the city code and paste after the country code

Exemple:

You want to call to Abrud to the telephone number 112233

You take the Abrud Code from the table: is 058

Calling to Abrud from outside Romania: +4058112233
Calling to Abrud from inside Romania: 058112233