A DNP is a degree, not a license, so a degree doesn't have a scope of practice. A DNP student can select their desired track of study for specialization. For example...you can specialize in ANP, FNP, PNP, CNM, CRNA, etc... as a DNP student. Not all DNP programs offer specialization for all possible areas of study, so you need to check out what the program offers.
For more DNP information, you can visit the website of the American Association of Colleges of Nursing (the "creators" of the DNP) http://www.aacn.nche.edu/
There is a column on the right side of the main page that has a link to Doctor of Nursing Practice. There is alot of information related to the development and implementation of the role (ie alot of how this role came to be), as well as a list of schools who currently offer this degree with a link to their websites.