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Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes. In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes.
The location information server, or LIS is a network node originally defined in the National Emergency Number Association i2 [1] network architecture that addresses the intermediate solution for providing e911 service for users of VoIP telephony. The LIS is the node that determines the location of the VoIP terminal.
A local information system (LIS) is a form of information system built with business intelligence tools, designed primarily to support geographic reporting.They overlap with some capabilities of geographic information systems (GIS), although their primary function is the reporting of statistical data rather than the analysis of geospatial data.
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California (Stockton, Modesto, Merced, Tracy, San Andreas, and a part of central California extending into central Yosemite National Park) 1958: split of 916; 1998: split to create 559; 2022: overlaid by 350; 210: Texas (San Antonio metropolitan area) 1992: split of 512; 1997: split three ways to create 830 and 956; 2017: overlaid by 726; 211
In 2001, it was planned to overlay area code 614 with area code 380, in anticipation of exhaustion. However, the anticipated growth did not materialize and number pooling replaced the proposal. On January 14, 2015 the PUCO instructed the telecommunications industry to finally implement the new area code on February 27, 2016. [3]
This is a list of mobile network operators (MNOs) in the United States. The Cellular Telecommunications & Internet Association (CTIA), lists approximately 30 facilities-based wireless service providers in the United States as members.