Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1GHZ callsign genealogy
Currently held by Koslowski, Eric J
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 KB1GHZ's current licensee, walking backwards.
- Koslowski, Eric JMAgranted 2019-09-12cancelled 2019-10-08
Successor callsigns
Callsigns held now by people who previously held KB1GHZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB1GHZ, oldest first.
- Koslowski, Eric J MA2001-02-20 → cancelled 2013-02-21
- Koslowski, Eric J MA2019-10-08 active