Prefix Information
The prefix 603 is part of area code 508 serving Worcester, Massachusetts.
This exchange contains 10,000 possible phone numbers (508-603-0000 through 508-603-9999).
Phone numbers with prefix 603 in area code 508. Location: Worcester, Massachusetts.
The prefix 603 is part of area code 508 serving Worcester, Massachusetts.
This exchange contains 10,000 possible phone numbers (508-603-0000 through 508-603-9999).