Yext Power Listing tool has often been useful to me to find bad NAP. I would caution others though that it is primarily a selling tool not a diagnostic one. And one that seems to be manipulated to increase your sense of discomfort EVEN when there is improving NAP.
By Yext’s measures 18 Listings improved, 4 stayed the same with totally wrong name, 6 had the right name or close to the right name and showed no change between October and now.
Yet in October 2014 it was scored at 37% error rate at Yext and in March 2015 it was scored with a 61% error rate DESPITE improving NAP (around the locations new name).
Still Bad, No Change
Yelp (bad listing removed)
Chamber of Commerce
OK, no change