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 local numbers as designated in the North American Numbering Plan.

The number 3-1-1 is intended in part to divert routine inquiries and non-urgent community concerns from the 9-1-1 number which is reserved for emergency service. A promotional website for 3-1-1 in Akron described the distinction as follows: "Burning building? Call 9-1-1. Burning Question? Call 3-1-1."

Many cities also accept 3-1-1 comments through online interfaces. An Open 311 application programming interface is also available for these services.

The first use of 3-1-1 for informational services was in Baltimore, Maryland, where the service commenced on 2 October 1996. 3-1-1 is intended to connect callers to a call center that can be the same as the 9-1-1 call center, but with 3-1-1 calls assigned a secondary priority, answered only when no 9-1-1 calls are waiting. This system is intended to extend the system such that true emergency callers are answered quickly with highest priority.

The largest 3-1-1 operation in North America operates in Toronto, which was implemented in 2009.

The Canadian Radio-television and Telecommunications Commission (CRTC) reserved the use of 3-1-1 for non-emergency municipal services throughout Canada on 5 November 2004. The first Canadian 3-1-1 service opened in Calgary, Alberta on 18 May 2005.

Historically, the 311 code was used by some telephone companies for testing purposes. In Alberta, 311 was the automatic number announcement circuit (ANAC) until 1 April 2005 when this was changed to 958-6111 to make way for the 3-1-1 service.

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