TLDR: No, there are only 92 distinct towns. There are 506 Census Tracts.
You can run getattr(boston_dataset, "DESCR") to get the description of the dataset.
While it does not directly contain the information that you want, it does tell you:
This dataset was taken from the StatLib library which is
maintained at Carnegie Mellon University.
Most telephone recording datasets are privately owned by parties who have access to such data like for example call-centers and tech-support companies etc. This data is subject to various privacy laws (which differ from one country to another), therefore it is tricky to find such data.
Nevertheless, the CallHome database and the CallFriend database -by ...