AT&T

AT&T Cybersecurity specializes in providing comprehensive security solutions tailored for mid-market enterprises facing modern security threats. The company offers a diverse range of products and services, including threat detection and response, network security, endpoint security, and identity and fraud protection. Key offerings include managed threat detection, unified security management solutions for managed security service providers, and various tools for compliance management and incident response. Additionally, AT&T Cybersecurity supports an open threat intelligence community through the Open Threat Exchange and provides open-source security information and event management solutions. The company serves various sectors, including education, finance, healthcare, and retail, and operates globally with offices in several countries. Established in 2007 and headquartered in San Mateo, California, AT&T Cybersecurity was formerly known as AlienVault, Inc. and became a subsidiary of AT&T Communications in 2019.

Lumina Networks, Inc. specializes in designing and developing open-source networking solutions aimed at simplifying and automating complex networks. Founded in 2017 and headquartered in San Jose, California, with additional offices in Australia, Canada, the United Kingdom, Ireland, and India, the company offers a range of products, including the Lumina SDN controller and network resource manager, as well as solutions for network visibility and software-defined data centers. Lumina is committed to empowering service providers by transitioning open software networking from theoretical concepts to practical applications, enabling them to regain control over their network infrastructure. By leveraging open-source platforms such as OpenDaylight, Lumina facilitates the development and implementation of production-ready, intent-driven networking systems while promoting a customer-centric approach to service delivery. The company also provides NetDev services to enhance collaboration and knowledge transfer in agile software development.

Created March 2014, FiberTower Corporation is a privately held provider of spectrum and fixed wireless services. FiberTower is the leader in millimeter band fixed wireless technology, also known as “wireless fiber.” The company offers spectrum leases and backhaul/equipment services in its 46 wide-area license areas. The services include Small Cell and Macro cell Backhaul and Transport solutions. The company enjoys longstanding veteran relationships with mobile carriers, government, community and industry customers. Prime wide-area licensed millimeter band spectrum (see map) is available for use in the 24GHz and 39GHz bands. The company engages in industry leading Research & Development (R&D) with Customers, Equipment Providers, and Deployment partners.

Time Warner, Inc. was a media and entertainment company based in New York, operating in four main segments: Cable, Filmed Entertainment, Networks, and Publishing. The Cable segment provided video, high-speed data, and voice services to both residential and commercial customers, alongside selling advertising time to various businesses. Its offerings included digital and analog video services, video on demand, high-definition television, and digital phone services. The Filmed Entertainment segment focused on producing and distributing theatrical films, television shows, and animation, as well as licensing rights for its content. The Networks segment included domestic and international television programming services, notably the HBO and Cinemax channels. Lastly, the Publishing segment was responsible for magazines and various online platforms covering topics such as lifestyle, sports, and news. In 2018, Time Warner was acquired by AT&T Inc., marking a significant shift in its corporate structure and operations.

Carrier IQ is a provider of mobile service intelligence solutions, catering primarily to mobile network operators and equipment vendors. The company specializes in offering insights that help improve mobile service performance and enhance user experience. By collecting and analyzing data related to mobile device usage, Carrier IQ enables wireless carriers to make informed decisions that optimize their services. The company's technology is designed to support the telecommunications industry by providing valuable analytics that can lead to better service delivery and customer satisfaction.

Blue Danube Systems, Inc. specializes in designing and developing advanced mobile wireless access solutions that significantly enhance network capacity and improve the overall quality of telecommunications services. The company's offerings include high-definition active antenna systems (HDAAS) and the BeamMaster platform, which utilizes beam-based optimization for real-time user traffic detection and hotspot pattern recognition. Blue Danube's Coherent Massive MIMO solution applies 5G beamforming technology to existing networks, allowing for a substantial increase in capacity and user experience. Founded in 2006, the company is headquartered in Mountain View, California, with an additional office in Warren, New Jersey.

Nextel Mexico offers its users with wireless communications services. The company is an analog specialized mobile radio operator that offers mobile radio voice, messaging, and data services for individuals and businesses. Nextel Mexico was founded in 1993 and it was acquired by AT&T on January 27, 2015.

Iusacell was the first company to introduce a Mexico cell phone , the first to provide 3G and also the pioneers in introducing the mobile Internet Broadband BAM . Today is the first mobile phone company in Mexico to offer a 4G network for their customers . The company has national coverage, and integrates the only two providers of wireless communication services in the country with CDMA technology, which generates the most efficient use of radio spectrum.

Alltel is a telecommunications company based in Rockport, Texas, that offers a range of wireless communication services, products, and solutions to both consumers and businesses. The company caters to various industries, including transportation, retail, insurance, healthcare, construction, and financial services. Alltel's wireless offerings encompass voice and data communication, postpaid and prepaid calling cards, roaming and long-distance services, and data solutions. Additionally, the company provides text and video messaging, digital gaming, radio streaming, internet access, and email services. Its business solutions include business intelligence, field service automation, security, and systems management, alongside a selection of mobile handsets and accessories. Alltel operates as a subsidiary of Verizon Wireless and AT&T.

Leap is a wireless communications provider that offers iservices under the Cricket brand. Leap's Cricket service offerings provide unlimited access to wireless voice and data services for a flat rate without requiring a fixed-term contract. Cricket is the pioneer of simple and affordable unlimited wireless services with no long-term commitments or credit checks required serving more than 5.3 million customers in 35 states and the District of Columbia. Cricket offers wireless voice and broadband Internet services over the latest technology, high-quality, all-digital 3G CDMA2000 1X and 1xEV-DO wireless network. Cricket’s nationwide wireless voice service plans include unlimited anytime minutes, unlimited U.S. long distance, unlimited text and picture messaging, unlimited text to Mexico, unlimited Mobile Web, unlimited directory assistance, as well as a variety of calling features and feature-rich mobile applications such as popular games, ringtones and wallpapers. Cricket Broadband provides unlimited Internet access anywhere within Cricket’s coverage areas at speeds comparable to DSL. The Company and its joint ventures operate in 34 states and the District of Columbia and hold licenses in 35 of the top 50 U.S. markets. Cricket services stretch across the country, from New York to California. Headquartered in San Diego, Calif., Leap is traded on the NASDAQ Global Select Market under the ticker symbol LEAP.

NextWave Wireless Inc. develops, produces, and markets mobile multimedia and consumer electronic connectivity product solutions. The company operates in two segments: Multimedia Segment; and Strategic Initiatives Segment. The Multimedia Segment, through PacketVideo Corporation (PacketVideo or PV), develops, produces, and markets mobile multimedia and consumer electronic connectivity product solutions, including embedded software for mobile handsets, client-server platforms for mobile media applications, such as music and video and software for sharing media in the connected home. PV Products and Technologies PacketVideo is a global provider of multimedia software and services. PacketVideo’s software transforms a mobile phone or other mobile device into a multimedia device that allows people to stream, download, and play video and music, receive live TV, or engage in two way video telephony.

picoChip specializes in signal processing products aimed at enhancing wireless telecommunications. The company designs and develops multi-core digital signal processing (DSP) solutions and is recognized for its software-defined radio products. It also offers a range of cost- and performance-optimized application-specific standard products (ASSP) devices. picoChip is particularly noted for its 3G femtocell technology, which is utilized in residential, enterprise, rural, and metropolitan environments both in the United Kingdom and internationally. The company's offerings include semiconductors, software solutions, and systems that empower cellular network operators to efficiently deliver voice and data services, as well as providing network equipment original equipment manufacturers (OEMs) with the necessary infrastructure for their products.

Centennial Communications, a subsidiary of [AT&T](/organization/at-t), is a leading provider of regional wireless and integrated communications services in the United States and Puerto Rico with approximately 1.1 million wireless subscribers and 582,200 access lines and equivalents. The U.S. business owns and operates wireless networks in the Midwest and Southeast covering parts of six states. Centennial’s Puerto Rico business owns and operates wireless networks in Puerto Rico and the U.S. Virgin Islands and provides facilities-based integrated voice, data and Internet solutions. Welsh, Carson, Anderson & Stowe is a significant shareholder of Centennial.

Sterling Commerce specializes in providing software and services designed to enhance connectivity and collaboration among enterprises, their customers, partners, and suppliers. The company offers integration solutions that facilitate the seamless integration of critical business processes, allowing organizations to streamline operations across the commerce lifecycle, from selling to fulfillment and payments. By focusing on B2B integration, secure file transfer, and multichannel selling, Sterling Commerce empowers enterprises to drive growth, adapt to market changes, and improve overall performance. Their solutions are aimed at transforming how companies conduct business, enabling them to effectively manage relationships and optimize their operations.

UCaaS for multinational enterprises

Edge Wireless LLC is a company that was acquired by AT&T in 2008.

Dobson Communications Corporation, through its subsidiaries, provides telephone services. The company offers local and long distance calling, voicemail, bundle, and DSL services, as well as repair service plans and security suites. It serves contingent exchanges in Oklahoma. Dobson Communications was formerly known as Dobson Holdings Corporation.

Interwise is a provider of voice, web, and video conferencing solutions tailored for enterprise needs. Founded in 1994 and headquartered in Cambridge, Massachusetts, the company offers AT&T Connect, an IP software designed for various applications including voice conferences, web meetings, virtual training, web seminars, webcasts, broadcasts, and recordings. Interwise serves a diverse range of industries, including technology, manufacturing, pharmaceuticals, insurance, automotive, and retail. In addition to its main office in the United States, the company maintains additional locations in Israel, Japan, the United Kingdom, Switzerland, France, and Germany.

USinternetworking, an applications services provider, manages companies' software via the internet. It provides hosted applications via the internet for large companies looking for managed software services. It offers applications from vendors in the areas of enterprise resource planning and customer relationship management (Oracle), spend management (Ariba), messaging and collaboration (Microsoft), and custom developed e-commerce systems. USinternetworking's customers included the State of Maryland's Department of Health and Mental Hygiene, Sunburst Hospitality, and Yankee Candle. The company was acquired by US telecom service giant AT&T in 2006.

BellSouth Corporation is an American telecommunications company and a subsidiary of AT&T. BellSouth was one of the original Bell Regional Operating Companies after the U.S. government forced the American Telephone & Telegraphic Company to divest itself of regional telephone companies. The company provided its services to the southern parts of the U.S. and has its headquarters in Atlanta, Georgia. BellSouth also operated an advertising and publishing unit, which printed and distributed phone books and directories. BellSouth was acquired by AT&T in 2006 in a deal worth US$ 86 billion.

Prodigy Communications Corp., an Internet service provider, serves both owned and managed dial and DSL subscribers. Products and services include Prodigy Instant Messaging™; Prodigy Chat™; Prodigy Online Communities; Prodigybiz, a suite of specially designed Internet products and services for small business owners; and Prodigy® En Espanol™, a bilingual Spanish/English-language Internet service created especially for the U.S. Spanish-speaking population.

New Global Telecom specializes in creating advanced telecommunications infrastructure and networks in Latin America and Asia. The company originally focused on building direct networks and providing international telecommunications services to Tier I carriers in various markets. Currently, it facilitates the sale of over 90 million minutes monthly to inter-exchange carriers across the U.S., Asia, Europe, and South America. In addition to its core services, New Global Telecom leverages its extensive in-house experience to offer a variety of telecommunications management services, supporting both emerging and established carriers in a rapidly evolving industry. As a fully integrated global communications provider, the company offers retail and wholesale internet, data, and switched voice services. New Global Telecom is also positioned to be among the first telecommunications firms to implement a fully converged network in emerging global markets.

As the leading national provider of building-centric, integrated communications services, OnSite Access is dedicated to bridging the interests of commercial property owners, real estate managers and agents, businesses, and the communications services industry. They're already wiring over 350 million square feet of real estate in 29 markets - all at no cost to building owners. In the process, they're turning properties with antiquated, inefficient communications infrastructures into buildings of the future. And they're enabling thousands of growing businesses to communicate, collaborate, and compete in ways never before possible or affordable.

In January 2002, OmniSky Corporation sold substantially all of its assets to EarthLink, Inc., including its subscriber base, all of its intellectual property rights, and key network assets, pursuant to its filing for Bankruptcy. The company prior to selling its assets was a global developer and provider of wireless data applications and services for users of mobile devices.

Tellme provides voice recognition and instruction technology, fundamentally improving how people use the phone to get the information they need everyday. By combining Internet data and a voice interface, Tellme's services let people simply say what they want and get it. Some of the services running on Tellme's platform include business search on 411, information search on 1-800-555-TELL as well as customer service and ordering for companies like American Airlines, Merrill Lynch, and FedEx. Tellme powered billions of calls every year and is used by more than 40 month. Microsoft acquired Tellme in 2007, and Microsoft now uses Tellme's technology in Windows Phone's voice recognition, Bing voice search, Xbox voice recognition, and other Microsoft technologies.

Eureka Broadband, a building-centric application service provider and premium high-speed Internet access company.

Eureka Broadband, a building-centric application service provider and premium high-speed Internet access company.

Tele-Communications was a cable television provider in the United States. It was acquired by AT&T in 1999.

Tut Systems, Inc. delivers advanced content processing and distribution products as well as comprehensive system integration services for deploying next-generation data and video services over broadband networks. Service providers, content providers and government agencies worldwide use Tut Systems solutions to deliver broadcast-quality video over broadband networks.

Alascom, Inc., d/b/a AT&T Alaska, is an Alaskan telecommunications company.