Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4PK callsign genealogy
Currently held by Alsobrook, John T
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by AI4PK's current licensee, walking backwards.
- Alsobrook, John TALgranted 2003-09-24cancelled 2006-05-01
Successor callsigns
Callsigns held now by people who previously held AI4PK.
No current licensee on record previously held this callsign.