311 may refer to: 311 (number), a natural number AD 311, a year of the Julian calendar, in the fourth century AD 311 BC, a year of the pre-Julian Roman calendar 311 (band), an American band 311 (album), band 311's self-titled album 311 (DSM-IV), DSM-IV code for "Depressive Disorder Not Otherwise Specified" 311 Boyz, a teen gang in Las Vegas, Nevada 311 Claudia, a main-belt asteroid 3-1-1, the telephone number of local information service operated by some local governments in the United States and Canada 3-1-1 for Carry-Ons, a procedure enacted by the United States Transportation Security Administration 311 earthquake, the 2011 Tōhoku earthquake and tsunami off Japan 311, the area code of a common fictitious telephone number (311-555-2368) used in early Bell System ads and in fiction Search for "311" or "3-1-1" on Wikipedia. Class 311 (disambiguation) 3/11 (disambiguation) All pages with titles beginning with 311 All pages with titles containing 311 This disambiguation page lists articles associated with the same number. If an internal link led you here, you may wish to change the link to point directly to the intended article.