Array Digital Infrastructure, Inc. is a leading owner and operator of shared wireless communications infrastructure across the United States, headquartered in Chicago, Illinois. The company manages a substantial portfolio of over 4,400 cell towers, providing critical support for the deployment of 5G and other wireless technologies nationwide. Array operates as a majority-owned (approximately 82–83%) subsidiary of Telephone and Data Systems, Inc..
Transitioning from its former identity as United States Cellular Corporation, Array has shifted its primary business focus to infrastructure. It leases tower space to major wireless carriers—most notably under a long-term Master License Agreement with T-Mobile—and retains spectrum assets that it aims to monetize strategically. This infrastructure-first strategy positions the company as a critical partner in expanding wireless coverage across U.S. markets.
Beyond tower leasing, Array pursues additional revenue by maintaining spectrum holdings and exploring asset sales to other carriers. Its operations combine steady, recurring leasing income with long-term infrastructure growth, anchored by its vast tower network and strategic spectrum assets.