Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4CTP callsign genealogy
Currently held by COAN III, JOHN
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 W4CTP's current licensee, walking backwards.
- COAN III, JOHN ONCgranted 2000-02-25cancelled 2008-10-03
- WB4OLHno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held W4CTP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4CTP, oldest first.
- COAN JR, JOHN O NC1996-01-29 → cancelled 2008-01-30
- COAN III, JOHN NC2018-09-25 active