Area code in this number is 203, also know as the Area Code or NPA Code. Central office (NXX Code) is 792, and is assigned by NANP to Danbury, CT. An individual code consisting of the phone exchange code and area code is assigned for each constituent of a city in United States. It's registered in Southern New England Telco Dba Frontier Comm Of Ct, and Landline number the phone carrier.