The Extra Class Ham License is the top of the line of all the ham licenses. As per the ARRL:

The HF bands can be awfully crowded, particularly at the top of the solar cycle. Once one earns HF privileges, one may quickly yearn for more room.

The Extra Class license is the answer. Extra Class licensees are authorized to operate on all frequencies allocated to the Amateur Service.

Testing Event Date From Date To Fee Status Location View Details
Extra License Class + Exam 08/03/2021 10/05/2021 $ 10.00 Open Online via Zoom View