I previously obtained a callsign for the 9th district, and my license was also expiring soon. Now that I'm operating from the 4th district, I initially considered getting a new callsign for the 4th district, but it seems that the new regulations don't necessarily require a change in callsigns, and transmitting from a different location doesn't seem to require reporting a series of prefixes.
Currently, I'm considering applying for a license directly in Zone 4 and retaining my original call sign. This would be convenient in the future. My main concern is whether obtaining a license in Zone 4 will allow me to continue using my existing call sign, or if it will prevent me from using it in Zone 9 after obtaining the license. I'm also worried about being assigned a new call sign by someone else if I use my original one in Zone 4.
After all, a 5-digit short number from area 9 still has some value, so I'm wondering how my colleagues at other stations would best preserve it.