Lookup › Area code 340
340 Area Code
Most looked-up 340 numbers
Phone prefixes in 340
Frequently asked questions
What prefixes are in area code 340?
Phone2.io tracks 1 phone prefixes in area code 340, with carrier and spam-report data on individual numbers.
More about area code 340
Area code 340 overview, history, and local numbers
Last updated: February 17, 2026