Prefix Information
The prefix 503 is part of area code 972 serving Dallas, Texas.
This exchange contains 10,000 possible phone numbers (972-503-0000 through 972-503-9999).
Phone numbers with prefix 503 in area code 972. Location: Dallas, Texas.
The prefix 503 is part of area code 972 serving Dallas, Texas.
This exchange contains 10,000 possible phone numbers (972-503-0000 through 972-503-9999).