Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9TSB callsign genealogy
Currently held by MCCULLOUGH, CHRISTOPHER 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 W9TSB's current licensee, walking backwards.
- MCCULLOUGH, CHRISTOPHER AINgranted 2018-09-14cancelled 2019-10-22
Successor callsigns
Callsigns held now by people who previously held W9TSB.
No current licensee on record previously held this callsign.