Prefix Information
The prefix 543 is part of area code 610 serving Allentown, Pennsylvania.
This exchange contains 10,000 possible phone numbers (610-543-0000 through 610-543-9999).
Phone numbers with prefix 543 in area code 610. Location: Allentown, Pennsylvania.
The prefix 543 is part of area code 610 serving Allentown, Pennsylvania.
This exchange contains 10,000 possible phone numbers (610-543-0000 through 610-543-9999).