Prefix Information
The prefix 603 is part of area code 414 serving Milwaukee, Wisconsin.
This exchange contains 10,000 possible phone numbers (414-603-0000 through 414-603-9999).
Phone numbers with prefix 603 in area code 414. Location: Milwaukee, Wisconsin.
The prefix 603 is part of area code 414 serving Milwaukee, Wisconsin.
This exchange contains 10,000 possible phone numbers (414-603-0000 through 414-603-9999).