The brief answer here is no, you can't.
We don't do this because it would violate our own Terms of Service and Privacy Policy; both of which stipulate that we cannot divulge user information. Think of this the same way you would if while you were staying at a hotel, your neighbor was loud, and you asked the front desk for their personal information - they can't tell you Tom Jones from Madison, Wisconsin is staying in that room. We more-or-less follow the same set of rules.
In the case that you absolutely need user information, we do generally comply with valid subpoenas issued by courts through police departments, and generally these instances are connected to cases of abuse and harassment.
As mentioned, 99%+ of the individuals that use PrankDial do so in an ethical manner and comply with our Terms. If you truly do believe that you're the victim of harassment, please reach out to Support.