Prefix Information
The prefix 400 is part of area code 817 serving Fort Worth, Texas.
This exchange contains 10,000 possible phone numbers (817-400-0000 through 817-400-9999).
Phone numbers with prefix 400 in area code 817. Location: Fort Worth, Texas.
The prefix 400 is part of area code 817 serving Fort Worth, Texas.
This exchange contains 10,000 possible phone numbers (817-400-0000 through 817-400-9999).