Prefix Information
The prefix 503 is part of area code 339 serving Quincy, Massachusetts.
This exchange contains 10,000 possible phone numbers (339-503-0000 through 339-503-9999).
Phone numbers with prefix 503 in area code 339. Location: Quincy, Massachusetts.
The prefix 503 is part of area code 339 serving Quincy, Massachusetts.
This exchange contains 10,000 possible phone numbers (339-503-0000 through 339-503-9999).