Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4YPK callsign genealogy
Currently held by TOWNSEND, MICHAEL 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 KF4YPK's current licensee, walking backwards.
- TOWNSEND, MICHAEL EALgranted 1998-05-21cancelled 2000-06-13
Successor callsigns
Callsigns held now by people who previously held KF4YPK.
All historical holders
Every license row we've seen with the callsign KF4YPK, oldest first.
- TOWNSEND, MICHAEL E AL1998-05-21 → cancelled 2000-05-25
- TOWNSEND, MICHAEL E AL2000-06-13 → cancelled 2008-05-28