Prefix Information
The prefix 399 is part of area code 669 serving San Jose, California.
This exchange contains 10,000 possible phone numbers (669-399-0000 through 669-399-9999).
Phone numbers with prefix 399 in area code 669. Location: San Jose, California.
The prefix 399 is part of area code 669 serving San Jose, California.
This exchange contains 10,000 possible phone numbers (669-399-0000 through 669-399-9999).