Prefix Information
The prefix 813 is part of area code 303 serving Denver, Colorado.
This exchange contains 10,000 possible phone numbers (303-813-0000 through 303-813-9999).
Phone numbers with prefix 813 in area code 303. Location: Denver, Colorado.
The prefix 813 is part of area code 303 serving Denver, Colorado.
This exchange contains 10,000 possible phone numbers (303-813-0000 through 303-813-9999).