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A communication control device is provided. The communication control device includes a controller that sets an acceptable interference amount of a primary system that is acceptable by a secondary system that secondarily uses a radio wave in a predetermined frequency band allocated to the primary system. In the setting of the acceptable interference amount, the controller sets a first margin to be allocated to the secondary system that is operating, a second margin that absorbs a change in the first margin that has been caused by a change in the total number of secondary systems, and a third margin to be commonly set between the communication control device and another communication control device.