Prefix Information

The prefix 340 is part of area code 314 serving St. Louis, Missouri.

This exchange contains 10,000 possible phone numbers (314-340-0000 through 314-340-9999).

Browse Numbers in This Prefix

314-340-0000-0999 314-340-1000-1999 314-340-2000-2999 314-340-3000-3999 314-340-4000-4999 314-340-5000-5999 314-340-6000-6999 314-340-7000-7999 314-340-8000-8999 314-340-9000-9999

Sample Numbers

(314) 340-0000 (314) 340-1234 (314) 340-2000 (314) 340-3333 (314) 340-4444 (314) 340-5555 (314) 340-6000 (314) 340-7777 (314) 340-8888 (314) 340-9999