Prefix Information
The prefix 543 is part of area code 303 serving Denver, Colorado.
This exchange contains 10,000 possible phone numbers (303-543-0000 through 303-543-9999).
Phone numbers with prefix 543 in area code 303. Location: Denver, Colorado.
The prefix 543 is part of area code 303 serving Denver, Colorado.
This exchange contains 10,000 possible phone numbers (303-543-0000 through 303-543-9999).