Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM1B callsign genealogy
Currently held by An, Chiyoon C
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 KM1B's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM1B.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM1B, oldest first.
- LANG, THOMAS H CT2008-11-25 → cancelled 2018-05-20
- An, Chiyoon C MA2020-06-09 active