| Condition | In use by AT&T and the NSA. Well maintained. |
| Architects | John Carl Warnecke |
| Construction Date | 1974 |
All aspects of this high-rise are tailored to the special needs of the equipment used by this phone and data-routing control center. Windowless facades clad in granite, especially high stories designed also to bear great loads and large ventilation openings were all meant to guarantee that operations could continue even given extreme outside factors from tornados to nuclear fallout.