Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4TAO callsign genealogy
Currently held by TAMKE-ALLEN OBSERVATORY
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 N4TAO's current licensee, walking backwards.
- KN4DTMcancelledTamke Allen ObservatoryTNgranted 2017-06-05cancelled 2017-06-27
Successor callsigns
Callsigns held now by people who previously held N4TAO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4TAO, oldest first.
- TAMKE-ALLEN OBSERVATORY TN2005-01-04 → cancelled 2017-01-05
- Tamke Allen Observatory TN2017-06-27 active