Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4EHM callsign genealogy
Currently held by ESPOSITO, CHARLES A
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 K4EHM's current licensee, walking backwards.
- Markham, Edwin HALgranted 2012-03-01cancelled 2012-03-30
Successor callsigns
Callsigns held now by people who previously held K4EHM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4EHM, oldest first.
- ESPOSITO, CHARLES A FL1995-08-16 → cancelled 2004-06-16
- Markham, Edwin H AL2022-07-06 active