Only four companies erect the majority of such structures: Doty Moore Tower Services (Cedar Hill, Texas); Kline Towers (Columbia, South Carolina); LeBlanc Royal Telecom (Oakville, Ontario); and Stainless Inc. (North Wales, Pennsylvania).
Likewise, Taipei 101 was often misrepresented as the world's tallest structure (although it was the tallest occupied building, before the certification of Dubai's Burj Khalifa as such), but in fact is far eclipsed by antenna towers in over a dozen states in the United States and in other countries.
In the United States, the FAA and the FCC must approve all towers exceeding 200 feet (61 m) in height.
These balloons rise to 18,000 feet (5,500 m), carrying radar units for drug interdiction purposes.
Main reference: U.S. Federal Communications Commission (FCC) database Tallest structures in the United States for different uses/structural types.