Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MPM callsign genealogy
Currently held by Mulligan, Michael P
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 W4MPM's current licensee, walking backwards.
- Mulligan, Michael PFLgranted 2016-05-16cancelled 2016-06-04
Successor callsigns
Callsigns held now by people who previously held W4MPM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MPM, oldest first.
- MILLETT, ROBERT P FL1993-01-12 → cancelled 2005-01-13
- Mulligan, Michael P FL2026-03-13 active