This question can have a number of answers depending on your definition of "largest".
The largest cellular network by number of subscribers in the US is Verizon Wireless with 125.28 million subscribers. Internationally, the largest company is China Mobile with whopping 760+ million.
Alternatively, T-Mobile has more cell sites per customer than any other U.S. wireless company.
American Tower Company
American tower company
AMT I guess
American Tower
Crown Castle
American Tower Corp.
American Tower Corp.
American Tower Corp
american tower corp
There are a number of companies that lease cellular transmission towers. In the U.S., Crown Castle, American Tower Corporation, and SBA Communications are the largest companies. Wireless Infrastructure Group (WIG) has the largest portfolio of sites in the U.K.
Cci, amt and sbac
American tower corp