The telephone country code 23 is followed by other numbers in order to call several different countries. For example, the country code 230 belongs to Mauritius. When calling a person in Mauritius from abroad, first dial the country code 00230. Mauritius is an island nation in the Indian Ocean.
There are several other telephone country codes that start with 23. All these countries are in Africa. The telephone country codes for Liberia, Sierra Leone, Ghana, Nigeria, Chad, Central African Republic and Cameroon are 00231, 00232, 00233, 00234, 00235, 00236 and 00237, respectively. These codes are called ISD codes. The abbreviation stands for “International Standard Dialing."