Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4WAP callsign genealogy
Currently held by Porter, William 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 KM4WAP's current licensee, walking backwards.
- Porter, William AGAgranted 2015-10-16cancelled 2015-11-07
Successor callsigns
Callsigns held now by people who previously held KM4WAP.
No current licensee on record previously held this callsign.