Area Code 791 is a telephone area code in the Russian numbering plan. It is assigned to the Kaliningrad Oblast, a federal subject of Russia located on the Baltic coast.
Here are some key details:
Location: Kaliningrad Oblast, Russia
Country Code: +7
Area Code: 791
Format: +7 4012 X (international format)
Note that Russia has a complex numbering plan, and area codes can vary in length. The 791-area code is used in conjunction with the 4012 prefix to complete calls to the Kaliningrad Oblast region.