Area Code Atlas

311 introduced for ARTIMIS travel information in Kentucky

In November 1995, the ARTIMIS Traveler Advisory Telephone Service (TATS) in the Kentucky AIMIS area introduced the 311 abbreviated dialing code for travel information. This marked an early use of N11 codes for transportation services in the region, one of the earliest uses of an N11 code for traveler information services in the United States.

First use of 3-1-1 for informational services in Baltimore, Maryland

On October 2, 1996, Baltimore, Maryland became the first city to use the 3-1-1 telephone number for informational and non-emergency municipal services. This initiative aimed to divert routine inquiries and non-urgent community concerns from the 9-1-1 emergency system.

3-1-1 service first deployed in Baltimore

3-1-1 service was first used for informational non-emergency municipal services in Baltimore, Maryland, starting on 2 October 1996. This established the model for 3-1-1 as a special telephone number for local government services.

3-1-1 service introduced as special N11 code

The 3-1-1 number was officially introduced as a special N11 code in the North American Numbering Plan in 1997 to provide access to non-emergency municipal services across many communities in the United States and Canada. The service offers a single point of contact for local government information and non-emergency police assistance.

Assignment of Service Codes 311 and 711

211 introduced for ARTIMIS travel information in Kentucky and Ohio

In March 1998, the ARTIMIS Traveler Advisory Telephone Service (TATS) introduced the 211 abbreviated dialing code for travel information in most of the ARTIMIS area in Kentucky and Ohio, replacing the previous 311 code. This change expanded access to traveler information services across the region and was part of early experimentation with N11 codes for traveler information.

Largest 3-1-1 operation implemented in New York City

In March 2003, New York City implemented the largest 3-1-1 operation in North America, providing a central hub for residents to access city services and information.

Largest 3-1-1 operation launched in New York City

New York City implemented the largest 3-1-1 operation in North America in March 2003, providing comprehensive non-emergency municipal services and information to residents.

Activation of the 3-1-1 number in Orange County, Florida

In 2004, Orange County, Florida activated the 3-1-1 number for governmental customer service, following a pilot program and the experience of three hurricanes that year.

CRTC reserves 3-1-1 for non-emergency municipal services in Canada

On November 5, 2004, the Canadian Radio-television and Telecommunications Commission (CRTC) reserved the 3-1-1 number for non-emergency municipal services throughout Canada.

3-1-1 reserved for non-emergency municipal services in Canada

The Canadian Radio-television and Telecommunications Commission (CRTC) reserved the 3-1-1 number for non-emergency municipal services throughout Canada on 5 November 2004, enabling Canadian municipalities to implement 3-1-1 services.

311 changed to 958–6111 in Alberta for 3-1-1 service

On April 1, 2005, Alberta changed the use of the 311 code, which had previously been used for the automatic number announcement circuit (ANAC), to 958–6111 to provide for the 3-1-1 service.

First Canadian 3-1-1 service opened in Calgary, Alberta

On May 18, 2005, Calgary, Alberta launched the first Canadian 3-1-1 service, providing residents with access to non-emergency municipal services.

First Canadian 3-1-1 service opened in Calgary

The first Canadian 3-1-1 service opened in Calgary, Alberta on 18 May 2005, providing residents with access to non-emergency municipal services via the 3-1-1 number.

Implementation of 3-1-1 service in Philadelphia

In 2008, the City of Philadelphia implemented its 3-1-1 service, providing information and service requests for departments across the city.

3-1-1 service launched in Halton Region, Ontario

On March 18, 2008, Halton Region, Ontario launched its 3-1-1 service, offering residents a single point of contact for municipal services.

3-1-1 service launched in Edmonton, Alberta

On December 16, 2008, Edmonton, Alberta launched its 3-1-1 service, providing access to municipal information and services.

3-1-1 service launched in Winnipeg, Manitoba

On January 16, 2009, Winnipeg, Manitoba launched its 3-1-1 service, enabling residents to access city services and information through a single number.

3-1-1 service launched in Toronto, Ontario

On September 24, 2009, Toronto, Ontario launched its 3-1-1 service, providing a central contact point for municipal services.

3-1-1 service launched in Peel Region, Ontario

On October 5, 2009, Peel Region, Ontario launched its 3-1-1 service for non-emergency municipal services.

Creation of uniform Open 311 API announced

On March 3, 2010, the Federal Chief Information Officer of the United States announced the creation of a uniform Open 311 application programming interface (API) to standardize access to 3-1-1 municipal services and improve interoperability. This initiative aimed to enhance citizen access to government services and data through a standardized API, building upon the existing 3-1-1 service infrastructure.

National 311 Day established

National 311 Day was established on March 11, 2020, to spread awareness about 3-1-1 systems and their role in connecting citizens to municipal services.

3-1-1 service launched in Lévis, Quebec

On March 17, 2021, the city of Lévis, Quebec launched its 3-1-1 telephone line, providing citizens with a single number for municipal services.