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ATN International, Inc., through its subsidiaries, engages in the provision of digital infrastructure and communications services to residential, business, and government customers in the United States and internationally. The company operates through International Telecom and US Telecom segments. The company offers mobile, data, voice, broadband, and fixed services; handsets and accessories; and wholesale roaming, long distance voice services, and site maintenance services. It also leases critical network infrastructure, including towers and transport facilities; and provides managed information technology services, such as network, application, infrastructure, and hosting services. The company was formerly known as Atlantic Tele-Network, Inc. and changed its name to ATN International, Inc. in June 2016. ATN International, Inc. was founded in 1987 and is headquartered in Beverly, Massachusetts.

Chorus Limited, together with its subsidiaries, provides fixed line communications infrastructure services in New Zealand. It offers phone and broadband services for residential and business customers; data and voice services; and asymmetric digital subscriber line and high-speed digital subscriber line broadband services, as well as solutions for transport and infrastructure. The company builds and maintains a network of fibre and copper cables, local telephone exchanges, and cabinets. In addition, it offers co-location and value added network services. Chorus Limited was founded in 2008 and is based in Wellington, New Zealand.

Spirent Communications plc provides automated test and assurance solutions in the Americas, the Asia Pacific, Europe, the Middle East, and Africa. The company operates through Lifecycle Service Assurance, and Networks & Security segments. The Lifecycle Service Assurance segment offers lab-based testing solutions for 5G mobile core networks, and cellular and Wi-Fi devices, as well as live solutions. This segment also provides lab and test automation solutions for the telecom industry and enterprises. The Networks & Security segment develops test methodologies, tools, and services for virtualised networks, cloud, and artificial intelligence networking infrastructure, as well as application performance and proactive security validation. This segment also offers Ethernet/internet protocol performance testing solutions, as well as navigation satellite system test and simulation solutions while addressing opportunities in the broader positioning, navigation, and timing market, including low earth orbit satellites and autonomous vehicles. The company was formerly known as Spirent plc and changed its name to Spirent Communications plc in May 2006. Spirent Communications plc was founded in 1936 and is headquartered in Crawley, the United Kingdom.

SmarTone Telecommunications Holdings Limited, an investment holding company, provides mobile telecommunication services in Hong Kong and Macau. The company offers voice, multimedia, and mobile and fixed fiber broadband services for the consumer and corporate markets. It is also involved in the sale of handsets and accessories; issuance of guaranteed notes; and provision of customer support and telemarketing services. The company was founded in 1992 and is headquartered in Kwun Tong, Hong Kong. SmarTone Telecommunications Holdings Limited is a subsidiary of Sun Hung Kai Properties Limited.

TalkTalk Telecom Group PLC provides fixed line, TV, and mobile telecommunications services. It offers landline, broadband, fiber, TV, and mobile services, including fixed price plans and unlimited broadband usage, as well as HomeSafe, a network-based security and filtering system. The company also provides various business-grade communications products and services, including Internet access, data, voice, and mobile. TalkTalk Telecom Group PLC was founded in 2002 and is based in London, the United Kingdom.