Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4GGH callsign genealogy
Currently held by Porter, Michael K
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 KN4GGH's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KN4GGH.
- Porter, Michael KGAgranted 2018-07-13cancelled 2020-07-31
All historical holders
Every license row we've seen with the callsign KN4GGH, oldest first.
- Porter, Michael K FL2017-10-02 → cancelled 2018-07-13
- Porter, Michael K MI2020-07-31 active