Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1BAB callsign genealogy
Currently held by Holmgren, John E
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 W1BAB's current licensee, walking backwards.
- Holmgren, John EMAgranted 2014-10-03cancelled 2015-02-03
Successor callsigns
Callsigns held now by people who previously held W1BAB.
No current licensee on record previously held this callsign.