Room 641A is located in the SBC Communications building at 611 Folsom Street, San Francisco, three floors of which were occupied by AT&T before SBC pur

Room 641A is located in the SBC Communications building at 611 Folsom Street, San Francisco, three floors of which were occupied by AT&T before SBC purchased AT&T. The room was referred to in internal AT&T documents as the SG3 [Study Group 3] Secure Room. The room measures about 24 by 48 feet (7.3 by 14.6 m) and contains several racks of equipment [...]. The oddly detailed description along with the badly lit photo makes this read like an SCP entry.