Been curious about this since getting my Tech license. I know new calls are assigned sequentially based on the regional-group list for your license class and mailing address, but I'm wondering about the mechanics. Does the FCC literally just go down an alphabetical list? What happens if certain combinations are unavailable or restricted?

Also heard different things about what prefixes new Techs and Generals get these days - is it still mostly K-prefix 2x3 calls for us?

Pretty much exactly that - each new callsign gets assigned sequentially from the pool based on your license class and address. The FCC maintains separate lists for each region and license class. Think of it like a giant phonebook that never resets!

Yes, new sequential calls are assigned from the pool, usually 2x3 format. The FCC issues the next never-before-assigned callsign in alphabetical order from your call district. Most new Techs/Generals do get K-prefix calls currently.

One thing to remember is you can get a new sequential call for free when upgrading license class or renewing every 10 years. So if you don't like your current call, you have options that don't cost $35!