Prefix Information
The prefix 400 is part of area code 540 serving Roanoke, Virginia.
This exchange contains 10,000 possible phone numbers (540-400-0000 through 540-400-9999).
Phone numbers with prefix 400 in area code 540. Location: Roanoke, Virginia.
The prefix 400 is part of area code 540 serving Roanoke, Virginia.
This exchange contains 10,000 possible phone numbers (540-400-0000 through 540-400-9999).