I am looking for the addresses of SBC main switching stations in
Harris county TX.  I found a list of the CLLI codes on
www.dslreports.com but can not find street addresses for the codes. 
For example, how would I find the street address of CLLI code
"HSTNTXBU"? These physical buildings are often referred to as: "Wire
Centers", "Central Offices".  (Ideally, I'd like instructions on how I
could find this information out on my own in the future.)