Prefix Information
The prefix 503 is part of area code 317 serving Indianapolis, Indiana.
This exchange contains 10,000 possible phone numbers (317-503-0000 through 317-503-9999).
Phone numbers with prefix 503 in area code 317. Location: Indianapolis, Indiana.
The prefix 503 is part of area code 317 serving Indianapolis, Indiana.
This exchange contains 10,000 possible phone numbers (317-503-0000 through 317-503-9999).