SearchBug.com offers a simple tool to look up street numbers in a given ZIP code. Enter the ZIP code for the area you want to research, and search through a list of all unique street numbers in that ZIP code
If you know the town or city, numbers by the block can be easy to find on a physical map. Most gas stations have a street number, and they are available online from a map company such as Rand McNally. A town or city map has the number for each block printed along each street. A county tax assessor or a town's chamber of commerce also provides this information on request.