Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4TQ callsign genealogy
Currently held by SHERRIFF, HARLAN E
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 AI4TQ's current licensee, walking backwards.
- SHERRIFF, HARLAN ESCgranted 2004-12-15cancelled 2007-02-26
Successor callsigns
Callsigns held now by people who previously held AI4TQ.
- SHERRIFF, HARLAN ESCgranted 2008-08-12cancelled 2016-03-29