[samtheman]

Thanks for your answer but I’m still not clear on this point:

Is it true that there is a single line circling the earth, parallel to the equator and a certain specific distance from the earth (22,000 miles, or whatever the exact number is), and that ALL geosynchronous satellites must share that one single (circle) line?

Is that the case?

[Rockingham]

Yes. Even with an orbital circle of 165,000 miles, geosynchronous slots are valuable and disputes arise.

[Yo-Yo]

Is it true that there is a single line circling the earth, parallel to the equator and a certain specific distance from the earth (22,000 miles, or whatever the exact number is), and that ALL geosynchronous satellites must share that one single (circle) line?

No, there are also inclined geosynchronous orbits that also orbit the Earth once in 24 hours, and crosses the equator twice, but as viewed from the Earth, carve out a figure eight path in the sky, rather than staying stationary at a single point.

The satellites for Sirius Satellite Radio Service are in inclined geosynchronous orbit, and their vertical tracks go from Canada to Argentina.