Calling this number proved to be ineffective because I don't have an account with Nissan Credit. If that's your situation, you won't get much out of calling this number because the phone system sets up a chokepoint from the beginning with important pieces of information.
If you call, you'll be asked to provide either your account number or your Social Security number to establish your identity. Failing to do so or refusing to do so will have you transferred to asking a representative for assistance after the third request. However, outside of standard business hours, this becomes hanging up the call entirely.
That's because the automated system is completely useless if you do not provide proper identification. If you're taken to the menu of needing assistance from a representative, the system will simply tell you that nobody is available to take your call and you will need to try again between Monday and Friday. At that point, the system automatically hangs up without offering you any additional options.
Overall, I think this number is set up well to have the chokepoints so early in the call. There really aren't any good reasons to be calling this number unless you're in specific need of credit or assistance with a credit account, and there's no reason at all to let someone in who can't identify a genuine need for the information. Setting up the chokepoint ensures that people who don't have a reason to call this number can't use it to get access to information they should not have.
Based on this, I would likely use this number for assistance if I had genuine need of assistance through Nissan Credit. If I didn't, I'd have no reason to recommend it, as it isn't useful to anyone without an account.