The two main providers for telecommunications are Tricom and Claro, both of whom offer a reliable service for a decent price. When it comes to mobiles, there are four main providers: Claro, Viva, Orange and Tricom. There are more than 8.8 million mobiles connected in the country, shared among a population of 10 million people.
The Dominican Republic’s country code is 089 which must be followed by one of two overlay codes, either 829 or 849. These should in turn be followed by the local number. If calling from the U.S. or Canada the entire number must be prefixed with a 1. The overlay codes were added in 2005 and 2010 due to the explosive growth of mobile phone usage.
Once in the country, use the prefix 011 to call abroad followed by the appropriate country code and local number you wish to call.
If you plan on using public phones, you might consider buying a calling card from Claro or Tricom. You can buy these in different amounts and they also function from private landlines by inputting a code.