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Important dates in the history of New York's 3-1-1 service include December 20, 2005, when it received its record high of 240,000 calls, due to the first day of the 2005 New York City transit strike, and June 20, 2007, when it received its 50 millionth call. [3] In San Francisco, 3-1-1 is the number for the City and County of San Francisco. As ...
Various services available through regional or national N11 codes (e.g.: 311 for non-emergency police or city services) in certain areas. Calling #77 from a mobile phone may reach the highway patrol in some states. [ 29 ]
The mnemonic N stands for the digits 2 through 9 and thus the syntax stands for the codes 211, 311, 411, 511, 611, 711, 811, and 911. These dialing codes provide access to special local services, such as 911 for emergency services, which is a facility mandated by law in the United States.
Direct-distance dialing (DDD) was first introduced in areas with common-control switching (panel and crossbar) in the 1950s.These areas had used 411 for directory assistance, and because of the ability of common-control switching to analyze the initial digits of a number in a "sender" before routing the call, these areas did not require the dialing of an initial 1 to initiate a long-distance call.
The Hundred Code is a three-digit police code system. [3] This code is usually pronounced digit-by-digit, using a radio alphabet for any letters, as 505 "five zero five" or 207A "two zero seven Alpha".
Outside of New York City, NYC's 311 service can be accessed by calling (212) NEW-YORK (212-639-9675) (dialing 3-1-1 outside of New York City may contact the local municipality's 311 service). There is also a website and a mobile app to access the 311 service. [12] Between 2003 and 2006 NYC311 received more than 30 million calls.
211 is a special abbreviated telephone number reserved in the North American Numbering Plan (NANP) as an easy-to-remember three-digit code to reach information and referral services to health, human, and social service organizations. Like the emergency telephone number 911, 211 is one of the eight N11 codes of the North American Numbering Plan ...
311: 030: Indigo Wireless: Americell PA 3 Partnership: Not operational: GSM 850 / GSM 1900 / UMTS 850: Pennsylvania; [84] [75] shut down 2023 [151] 311: 040: Choice Wireless: Commnet Wireless: Operational: GSM 850 / GSM 1900 / UMTS 850 / UMTS 1900 [84] [75] CDMA shut down Dec 2022 [174] 311: 050: Thumb Cellular LP: Operational: CDMA2000 850 ...