A leading technology and solutions development organization, the Alliance for Telecommunications Industry Solutions (ATIS) brings together top global ICT companies to advance the industry’s business priorities. These priorities follow a fast-track development lifecycle from design and innovation through standards, specifications, requirements, business use cases, software toolkits, open source solutions and interoperability testing.

ATIS, as the IMSI administrator, participates in the management of all segments of the IMSI and directly administers the Home Network Identity (HNI) segment. HNIs uniquely identifies the home network of a public mobility service subscriber and contains the Mobile Country Code (MCC) and Mobile Network Code (MNC). The remaining segment of the IMSI, the Mobile Station Identification Number (MSIN), is administered by the network operator assigned to the HNI.

Canadian Radio-television and Telecommunications Commission (CRTC) ensures that Canadians have access to a world-class communication system that promotes innovation and enriches their lives. Their role is to implement the laws and regulations set by Parliamentarians who create legislation and departments that set policies. CRTC regulates and supervises broadcasting and telecommunications in the public interest.

The National Exchange Carrier Association (NECA) plays an essential role in helping members deliver vital telecommunications services to rural consumers at reasonable prices. We are also a proven source of reliable industry data analysis.

Pool Administration (assignment of blocks within an NXX):
Information, supporting documentation, forms and procedures as pertain to the "pooling" of NXXs within the United States is provided is maintained by the National (U.S.) Number Pool Administrator.

CTIA represents the U.S. wireless communications industry and the companies throughout the mobile ecosystem that enable Americans to lead a 21st century connected life. The association’s members include wireless carriers, device manufacturers, suppliers, apps and content companies. CTIA vigorously advocates at all levels of government for policies that foster continued wireless innovation and investment. CTIA coordinates the industry’s voluntary best practices and hosts educational events that promote the wireless industry.

The International Telecommunications Union (ITU) facilitates international connectivity in communications networks. The ITU allocates global radio spectrum and satellite orbits, develops technical standards that ensure networks and technologies seamlessly interconnect and improve access to ICTs to underserved communities worldwide. Every time you make a phone call via the mobile, access the Internet or send an email, you are benefiting from the work of ITU.

The National Association of Regulatory Utility Commissioners (NARUC) is a non-profit organization whose members include governmental agencies engaged in the regulation of utilities and carriers in the 50 states, the District of Columbia, Puerto Rico and the Virgin Islands. NARUC's members regulate telecommunications, energy, and water utilities. NARUC represents the interests of State public utility commissions before the three branches of the Federal government.

The North American Numbering Council (NANC) is a Federal Advisory Committee that was created to advise the Commission on numbering issues and to make recommendations that foster efficient and impartial number administration.

The North American Numbering Plan (NANP) is an integrated telephone numbering plan serving 20 North American countries that share its resources. Countries include the U.S. and its territories, Canada, Bermuda, Anguilla, Antigua and Barbuda, Bahamas, Barbados, British Virgin Islands, Cayman Islands, Dominica, Dominican Republic, Grenada, Jamaica, Montserrat, Sint Maarten, St. Kitts and Nevis, St. Lucia, St. Vincent and Grenadines, Trinidad and Tobago, and Turks and Caicos.

USTelecom represents companies of all sizes committed to investing in a network infrastructure that encourages and supports broadband connectivity. USTelecom members are technology innovators creating new opportunities and connections for families, enterprises and communities.