Prefix Information
The prefix 603 is part of area code 425 serving Bellevue, Washington.
This exchange contains 10,000 possible phone numbers (425-603-0000 through 425-603-9999).
Phone numbers with prefix 603 in area code 425. Location: Bellevue, Washington.
The prefix 603 is part of area code 425 serving Bellevue, Washington.
This exchange contains 10,000 possible phone numbers (425-603-0000 through 425-603-9999).