Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9MTM callsign genealogy
Currently held by McGinnity, Mark T
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 W9MTM's current licensee, walking backwards.
- McGinnity, Mark TWIgranted 2011-08-31cancelled 2011-10-04
Successor callsigns
Callsigns held now by people who previously held W9MTM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9MTM, oldest first.
- DALACKER, WILLIAM A IL1997-08-01 → cancelled 2009-08-04
- McGinnity, Mark T WI2021-09-14 active