311 may refer to: *

311 (number) 311 (three hundred ndeleven) is the natural number following 310 and preceding 312. In mathematics 311 is the 64th prime; a twin prime with 313; an irregular prime; an emirp, an Eisenstein prime with no imaginary part and real part of the fo ...

, a natural number *

AD 311 __NOTOC__ Year 311 ( CCCXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Valerius and Maximinus (or, less frequently, year 1064 '' ...

, a year of the Julian calendar, in the fourth century AD *

311 BC __NOTOC__ Year 311 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Brutus and Barbula (or, less frequently, year 443 ''Ab urbe condita''). The denomination 311 BC for this year has been ...

, a year of the pre-Julian Roman calendar *

311 (band) 311 (pronounced "three eleven") is an American rock band from Omaha, Nebraska. The band was formed in 1988 by vocalist and guitarist Nick Hexum, lead guitarist Jim Watson, bassist Aaron "P-Nut" Wills, and drummer Chad Sexton. Watson was repl ...

, 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 *

3-1-1 3-1-1 is a special telephone number supported in many communities in Canada and the United States. The number provides access to non-emergency municipal services. The number format follows the N11 code for a group of short, special-purpose loca ...

, 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 Ranges for fictitious telephone numbers are common in most telephone numbering plans. One of the main reasons these ranges exist is to avoid accidentally using real phone numbers in movies and television programs because of viewers frequently calli ...

(311-555-2368) used in early Bell System ads and in fiction

See also