An international telephone number is displayed by automatically inserting at least one space after the country code portion of the telephone number. In particular, when a telephone number having an International Direct Dialing (IDD) prefix, such as "00", "011" and "+", is received, the telephone number is then displayed by inserting at least one space between a country code portion contained in the telephone number and subsequent numbers of the telephone number. The country code portion of the telephone number is determined by accessing a look-up table for identifying the country code portion of the telephone number. Alternatively, the country code portion could be determined by comparing numbers appearing subsequent to the IDD prefix with predetermined country codes.