On 12/4/2025 6:18 AM, Barry W2UP wrote: > Consider the primary US zones, 3, 4, and 5. Zone 5 is roughly 500 miles > wide. Zone 4 is roughly 1600 miles wide, and zone 3 is about 1000 miles > wide. It is my understanding that CQ Zones were established on the basis of population or ham licenses. 73, Jim K9YC