Cellular Sea

MVNOs sell their own SIMs and plans but run on Cellular Sea's network rather than owning one.

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About Cellular Sea

AT&T Mobility Cellular Sea, operating worldwide, represents a specialized segment of AT&T's vast telecommunications network. While AT&T is more commonly associated with its operations within the United States, this particular entity focuses primarily on providing cellular services to maritime environments, extending connectivity to ships and other offshore platforms. Identified by the Mobile Country Code (MCC) 901, signifying its international reach and application, and the Mobile Network Code (MNC) 18, it fills a unique niche within the global connectivity landscape. This enables crew, passengers, and operational systems to stay connected even far from terrestrial base stations, and ensures coverage options where traditional networks may falter. Unlike AT&T's primary operations in the United States, where it competes fiercely with Verizon and T-Mobile for market share, AT&T Mobility Cellular Sea operates in a specialized and comparatively less competitive environment. While consumer mobile services are widespread, Maritime connectivity represents a specialist area with far fewer providers, and as one of the United States' biggest telecommunication network, it makes perfect sense to leverage the vastness of the infrastructure of a major player in the market. Being a subsidiary of AT&T (American Telephone and Telegraph Company), they utilize sophisticated satellite and cellular technology, and it's crucial to the maritime economy, supporting both leisure and commercial shipping operations.

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1. 2026-09-07

   Network types changed to 5G, CDMA, GSM, LTE, Satellite, and UMTS.

   • Network typesCDMA, GSM, GSM, UMTS→5G, 5G, 5G, 5G, CDMA, CDMA, GSM, GSM, GSM, GSM, LTE, LTE, LTE, LTE, LTE, LTE, Satellite, UMTS, UMTS, UMTS, UMTS, UMTS, U…