I have Census Blocks Code data (15 digits code) and need to get corresponding street names and addresses in NYC. What is the best source of such information?
You could do this with a few lines of R, taking the spatial over of the roads file and the block file, then iterating through the list and dumping it to a nice table. I'm not sure of any other way to do this.
If you are fine with human-readable, you can find the block maps at https://www2.census.gov/geo/maps/dc10map/GUBlock/st36_ny/place/p3651000_new_york/.