611 Folsom Street

611 Folsom Street may refer to anything of or relating to the NSA warrantless surveillance controversy and may also refer directly to:
 * AT&T's regional switching center, San Francisco.
 * Room 641A, located on the sixth floor at AT&T's switching center.
 * NSA warrantless surveillance controversy.
 * Wiretapping
 * Mark Klein, a whistle-blower uncovering U.S. federal spying program.
 * San Luis Obispo, data center which routed data to Folsom address.