Prefix Information
The prefix 399 is part of area code 414 serving Milwaukee, Wisconsin.
This exchange contains 10,000 possible phone numbers (414-399-0000 through 414-399-9999).
Phone numbers with prefix 399 in area code 414. Location: Milwaukee, Wisconsin.
The prefix 399 is part of area code 414 serving Milwaukee, Wisconsin.
This exchange contains 10,000 possible phone numbers (414-399-0000 through 414-399-9999).