Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0LIN callsign genealogy
Currently held by Humphries, Colin J
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 K0LIN's current licensee, walking backwards.
- Humphries, Colin JPAgranted 2007-07-26cancelled 2011-10-18
Successor callsigns
Callsigns held now by people who previously held K0LIN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0LIN, oldest first.
- PULIS, CLAUD D MO1997-02-12 → cancelled 2009-02-13
- Humphries, Colin J PA2021-07-28 active