Prefix Information
The prefix 503 is part of area code 781 serving Lexington, Massachusetts.
This exchange contains 10,000 possible phone numbers (781-503-0000 through 781-503-9999).
Phone numbers with prefix 503 in area code 781. Location: Lexington, Massachusetts.
The prefix 503 is part of area code 781 serving Lexington, Massachusetts.
This exchange contains 10,000 possible phone numbers (781-503-0000 through 781-503-9999).