Uruguay no longer has telephone area codes, as of 2010. All numbers in Uruguay are now 8 digits, and you must dial the full 8-digit number on all calls. From outside Uruguay, simply prefix country code +598 to the 8-digit Uruguayan number.
Numbers in the Montevideo metropolitan area begin with +598 2.
Landline numbers in the interior of the country begin with +598 4.
Mobile numbers throughout the country begin with +598 9.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
The country code and area code of Trinidad, Uruguay is 598, (0)364.
The country code and area code of Mercedes, Uruguay is 598, (0)53.
The country code and area code of Rodrkguez, Uruguay is 598, (0)348.
The country code and area code of Artigas, Uruguay is 598, (0)772.
The country code and area code of Izcua, Uruguay is 598, (0)412.
The country code and area code of Aigui, Uruguay is 598, (0)446.
The country code and area code of Araminda, Uruguay is 598, (0)37.
The country code and area code of Caballada, Uruguay is 598, (0)52.
The country code and area code of Capurro, Uruguay is 598, (0)338.
The country code and area code of Cardona, Uruguay is 598, (0)536.
The country code and area code of Carmelo, Uruguay is 598, (0)542.
The country code and area code of Carmen, Uruguay is 598, (0)365.