Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB5SL callsign genealogy
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 AB5SL's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held AB5SL.
- CRAWFORD II, FREDERICK LOKgranted 2006-04-25cancelled 2018-06-12