I just looked through the latest DSD+ USA license data (updated this morning), and it's a hot mess. I'm finding many omissions, a lot of inaccuracies, and worst of all (this is a long-standing issue), they are displaying the CONTACT info, not the LICENSEE info.
So for example, 453.0125 might be licensed to Town of Anywhere, but the contact info might be ABC Communications, Inc. who handles their licensing. If you hover over 453.0125, guess what's going to pop up? 🤦♂️
I brought that to the attention of the DSD+ author many moons ago, and nothing was changed to fix it. Also, the actual call sign itself is not included in the raw data files, which makes it even less useful.