I was looking for open directories to get cool internal company phone numbers from, and then I stumbled across this file.
It contains switch names, their location, and their test phone number. Every single switch in Illinois, Indiana, Michigan, Ohio, and Wisconsin. It even has the switches grouped into categories based on what type of switch it is!
Re uploaded here: http://www.mediafire.com/view/?8x79k6i2u7hah1b
You'll never GUESS where I found these. I have many more juicy documents that I found on the same webserver, all about AT&T-related telephony.