Prefix Information
The prefix 503 is part of area code 209 serving Stockton, California.
This exchange contains 10,000 possible phone numbers (209-503-0000 through 209-503-9999).
Phone numbers with prefix 503 in area code 209. Location: Stockton, California.
The prefix 503 is part of area code 209 serving Stockton, California.
This exchange contains 10,000 possible phone numbers (209-503-0000 through 209-503-9999).