Prefix Information
The prefix 603 is part of area code 484 serving Allentown, Pennsylvania.
This exchange contains 10,000 possible phone numbers (484-603-0000 through 484-603-9999).
Phone numbers with prefix 603 in area code 484. Location: Allentown, Pennsylvania.
The prefix 603 is part of area code 484 serving Allentown, Pennsylvania.
This exchange contains 10,000 possible phone numbers (484-603-0000 through 484-603-9999).