Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4AMP callsign genealogy
Currently held by O BRIEN III, JAMES V
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 W4AMP's current licensee, walking backwards.
- O BRIEN III, JAMES VGAgranted 2008-08-08cancelled 2017-09-08
Successor callsigns
Callsigns held now by people who previously held W4AMP.
- O BRIEN III, JAMES VGAgranted 2008-08-08cancelled 2017-09-08
All historical holders
Every license row we've seen with the callsign W4AMP, oldest first.
- O BRIEN III, JAMES V GA2008-08-08 → cancelled 2017-08-15
- O BRIEN III, JAMES V GA2017-09-08 active