If you're asking how many names can you put in your local address book, or even the public address book, there is no practical limit. If the db has an old design, or the switch turned on to impose the old limit, then the entire db could be limited to 4GB in size. Other than that, it's just available disk space.

If you're asking how many names can you put in your local address book, or even the public address book, there is no practical limit. If the db has an old design, or the switch turned on to impose the old limit, then the entire db could be limited to 4GB in size. Other than that, it's just available disk space.