I purchased this with the intent of using to help divide mailing lists by sales territory. However,I soon realized that it defines zip code areas by the first three digits only, i.e. 640, 641. This was helpful, but not nearly as much help as a five digit breakout would have been. If you need a five digit breakout, buy a wall map.
Zip Code Atlas
Rating: 5/5
This book has been the best resource for me when I'm trying to determine sales territory alignments based on customer zip codes. Many times, the zip code is not provided to me and I can go to this book and get on track. This has saved me a great deal of frustration! I have an older edition and am now looking to order an updated one.