Prefix Information
The prefix 478 is part of area code 303 serving Denver, Colorado.
This exchange contains 10,000 possible phone numbers (303-478-0000 through 303-478-9999).
Phone numbers with prefix 478 in area code 303. Location: Denver, Colorado.
The prefix 478 is part of area code 303 serving Denver, Colorado.
This exchange contains 10,000 possible phone numbers (303-478-0000 through 303-478-9999).