Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB1MM callsign genealogy
Currently held by Pratt, Ryan M
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 AB1MM's current licensee, walking backwards.
- Manders, Michael JTXgranted 2024-06-18cancelled 2024-12-27
Successor callsigns
Callsigns held now by people who previously held AB1MM.
- Pratt, Ryan MWAgranted 2020-06-11
All historical holders
Every license row we've seen with the callsign AB1MM, oldest first.
- Pratt, Ryan M NH2008-03-13 → cancelled 2010-06-26
- Manders, Michael J TX2024-12-27 active