Prefix Information
The prefix 503 is part of area code 512 serving Austin, Texas.
This exchange contains 10,000 possible phone numbers (512-503-0000 through 512-503-9999).
Phone numbers with prefix 503 in area code 512. Location: Austin, Texas.
The prefix 503 is part of area code 512 serving Austin, Texas.
This exchange contains 10,000 possible phone numbers (512-503-0000 through 512-503-9999).