Prefix Information

The prefix 840 is part of area code 972 serving Dallas, Texas.

This exchange contains 10,000 possible phone numbers (972-840-0000 through 972-840-9999).

Browse Numbers in This Prefix

972-840-0000-0999 972-840-1000-1999 972-840-2000-2999 972-840-3000-3999 972-840-4000-4999 972-840-5000-5999 972-840-6000-6999 972-840-7000-7999 972-840-8000-8999 972-840-9000-9999

Sample Numbers

(972) 840-0000 (972) 840-1234 (972) 840-2000 (972) 840-3333 (972) 840-4444 (972) 840-5555 (972) 840-6000 (972) 840-7777 (972) 840-8888 (972) 840-9999