Checked earlier and am reporting what the web states
American Tower
American Tower owns 40.6k towers in the United States, which represents 23% of the company’s total, of 179k towers globally.
Crown Castle owns 40.1k towers in the United States, which represents 100% of the company’s total. Crown Castle does not operate cellular towers internationally.
SBA Communications owns 16.5k towers in the United States, which represents 50% of the company’s total, of 32.7k towers globally.
And this: https://www.fiercewireless.com/wireless/at-t-sells-and-leases-towers-to-crown-castle-4-85b-deal