Telecommunications - Get Corporate Office Addresses, Company Details & Contact Info

Optimum

About Optimum Communications, Inc. is an American telecommunications company providing cable TV, fiber and broadband internet, telephone, and mobile services to residential and business customers. Headquartered at 1 Court Square West in Long Island City, Queens, New York City, Optimum is the successor brand to Altice USA — which itself was built from the 2016 acquisition of Cablevision by French-Israeli telecom conglomerate Altice N.V. In November 2025, the company officially rebranded its corporate name from Altice USA, Inc. to Optimum Communications, Inc. and changed its NYSE ticker from ATUS to OPTU, consolidating its consumer-facing brand with its corporate identity. Optimum serves approximately 4.2 million broadband subscribers and 1.63 million pay TV subscribers across 21 states as of Q3 2025. The

TracFone Wireless

About TracFone Wireless, Inc. is the largest prepaid wireless provider in the United States and a wholly owned subsidiary of Verizon Communications, Inc. following Verizon’s $6 billion acquisition of the company completed in November 2021. Founded in 1996 and headquartered at 9700 N.W. 112th Avenue in Miami, Florida, TracFone operates as a Mobile Virtual Network Operator (MVNO) — it does not own its own wireless towers but provides prepaid and no-contract service over major carrier networks. TracFone serves approximately 21 million subscribers through a portfolio of brands including Straight Talk, Total Wireless, Net10 Wireless, SafeLink Wireless, and Walmart Family Mobile, available at over 90,000 retail locations nationwide. Address note: Some directories list TracFone’s address under the city of Medley, FL

T-Mobile

About T-Mobile US, Inc. is America’s second-largest wireless telecommunications carrier and self-styled “Un-carrier,” headquartered at 12920 SE 38th Street, Bellevue, Washington 98006 in the Factoria neighborhood east of Seattle. Originally founded in 1994 as VoiceStream Wireless PCS, the company was acquired by Deutsche Telekom in 2001 and rebranded as T-Mobile USA in 2002, before completing a landmark $26 billion merger with Sprint in April 2020 to become the nation’s largest 5G network operator serving over 140 million subscribers. The Bellevue headquarters campus spans ten buildings in the Factoria and Eastside region, employing approximately 70,000 people and generating $80 billion in annual revenue. Quick Facts Founded June 22, 1994 (as VoiceStream Wireless PCS) Industry Wireless telecommunications Employees 70,000 (as of Dec

Boost Mobile

About Boost Mobile is an American prepaid wireless telecommunications brand operating under EchoStar Corporation (formerly DISH Network), currently headquartered at 5701 S Santa Fe Drive, Littleton, Colorado 80120. Originally founded in 2000 in Australia by Peter Adderton as a youth-focused prepaid brand, Boost Mobile entered the US market through a Sprint partnership and was later sold to DISH Network in 2020 for $1.4 billion as part of the Sprint–T-Mobile merger settlement. Its former California operations were based at 9060 Irvine Center Drive, Irvine, CA 92618, which previously served as the brand’s product and technology hub. Quick Facts Founded 2000 (Australia) US Market Entry 2002 Industry Prepaid wireless telecommunications Current HQ 5701 S Santa Fe Drive, Littleton, CO 80120 Former California

Lumen Technologies

Lumen Technologies corporate headquarters is located at 100 CenturyLink Drive, Monroe, LA 71203, United States, in Monroe, Louisiana, where the company has been anchored since its origins as CenturyTel and later CenturyLink before rebranding to Lumen Technologies in September 2020. Lumen’s corporate office oversees a global fiber network delivering secure networking, edge cloud, and AI-ready infrastructure solutions to enterprise, government, and wholesale customers across the United States and internationally. Customers, enterprise clients, investors, and media regularly need the Lumen Technologies corporate office address and Lumen contact details for service enquiries, billing disputes, complaints, and corporate matters. Quick Facts Corporate Headquarters Address Lumen Technologies, Inc., 100 CenturyLink Drive, Monroe, LA 71203, United States Corporate Office Phone Number +1 318‑388‑9000 U.S. Sales

Onvoy LLC

About Onvoy, LLC is an American wholesale telecommunications provider headquartered at 10300 6th Avenue North, Plymouth, Minnesota 55441. It is a B2B-only company — it does not sell directly to individual consumers — and operates as a subsidiary of Sinch AB, a Swedish publicly traded cloud communications company (Nasdaq Stockholm: SINCH). Onvoy was founded in 1991 in Minnesota as a regional telecommunications and internet service provider. Over the following three decades it grew into one of the largest wholesale voice and messaging carriers in the United States, primarily through acquisitions. The most significant of these was its 2015 acquisition of Broadvox LLC, which made Onvoy the third-largest Competitive Local Exchange Carrier (CLEC) by rate center coverage in the US. In

AT&T

About AT&T Inc. (NYSE: T) is the largest telecommunications company in the United States and one of the largest in the world, with its global corporate headquarters at 208 S. Akard Street (Whitacre Tower), Dallas, Texas 75202 — Downtown Dallas — where AT&T has been headquartered since June 2008. In January 2026, AT&T CEO John Stankey officially announced that AT&T will relocate its global headquarters from Downtown Dallas to a new 54-acre corporate campus at 5400 Legacy Drive, Plano, Texas — in proximity to Plano’s Legacy West district — within the next three years. The move is designed to consolidate AT&T’s three largest DFW facilities (Central Dallas, Plano, and Irving) into a single integrated campus. AT&T traces its corporate lineage

Comcast

About Comcast Corporation (NASDAQ: CMCSA) is the largest cable and broadband provider in the United States and one of the world’s largest media and technology conglomerates, headquartered at Comcast Center, 1701 John F. Kennedy Boulevard, Philadelphia, Pennsylvania 19103 — the 58-story glass skyscraper that is the tallest building in Philadelphia and was the largest private commercial development in Pennsylvania’s history at the time of its construction. Comcast was founded in 1963 by Ralph J. Roberts, Daniel Aaron, and Julian Brodsky in Tupelo, Mississippi as a single cable system operator with 1,200 subscribers, and has since grown through relentless acquisition and organic expansion into a $123.7 billion Fortune 50 conglomerate. The company operates through three major divisions: Connectivity & Platforms (Xfinity

Dish Network

About DISH Network, LLC (formerly DISH Network Corporation, NASDAQ: DISH) is the largest satellite television provider in the United States, headquartered at 9601 South Meridian Boulevard, Englewood, Colorado 80112 — in the Denver Tech Center corridor of Englewood, a south Denver suburb approximately 12 miles southeast of Downtown Denver. DISH was founded in 1980 by Charlie Ergen, Candy Ergen, and Jim DeFabrizio in Denver, Colorado — starting as EchoStar, a company that sold large C-band satellite dishes out of a truck before pivoting to the direct-broadcast satellite (DBS) business. The DISH Network brand launched in 1996 as a consumer satellite TV service. In 2008, EchoStar was spun off from DISH Network as a separate satellite technology company. On January 1,

MetroPCS

About MetroPCS — now operating as Metro by T-Mobile — is an American prepaid wireless telecommunications brand headquartered at 2250 Lakeside Boulevard, Richardson, Texas 75082 — the Lakeside Center II building in Richardson’s Lakeside Business District, where MetroPCS moved its Texas operational headquarters in 2007 from its previous Dallas location at 8144 Walnut Hill Lane. MetroPCS was founded in 1994 as General Wireless, Inc. by Roger D. Linquist and Malcolm Lorang — both former executives of PageMart Wireless — and grew into the first US carrier to offer unlimited wireless service for a flat monthly rate, making it a trailblazer in the prepaid wireless segment. In April 2013, T-Mobile US, Inc. merged with MetroPCS in a landmark transaction that created

Category: Telecommunications