Prefix Information
The prefix 603 is part of area code 559 serving Fresno, California.
This exchange contains 10,000 possible phone numbers (559-603-0000 through 559-603-9999).
Phone numbers with prefix 603 in area code 559. Location: Fresno, California.
The prefix 603 is part of area code 559 serving Fresno, California.
This exchange contains 10,000 possible phone numbers (559-603-0000 through 559-603-9999).