Prefix Information
The prefix 631 is part of area code 559 serving Fresno, California.
This exchange contains 10,000 possible phone numbers (559-631-0000 through 559-631-9999).
Phone numbers with prefix 631 in area code 559. Location: Fresno, California.
The prefix 631 is part of area code 559 serving Fresno, California.
This exchange contains 10,000 possible phone numbers (559-631-0000 through 559-631-9999).