Prefix Information
The prefix 503 is part of area code 219 serving Gary, Indiana.
This exchange contains 10,000 possible phone numbers (219-503-0000 through 219-503-9999).
Phone numbers with prefix 503 in area code 219. Location: Gary, Indiana.
The prefix 503 is part of area code 219 serving Gary, Indiana.
This exchange contains 10,000 possible phone numbers (219-503-0000 through 219-503-9999).