Area code 345 Wikipedia
Area code 345 is the local telephone area code of the Cayman Islands. The 345 area code was created during a split from the original 809 area code which was done c. September 1996.
When in the Cayman Islands, the seven digits are used alone. When calling to Cayman Islands from anywhere in the United States or Canada 1(345) is dialed along with the other seven digits of the phone number.