Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4TB callsign genealogy
Currently held by Fajar Marrero, Jose M
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 WP4TB's current licensee, walking backwards.
- Fajar Marrero, Jose MPRgranted 2019-09-06cancelled 2019-10-22
Successor callsigns
Callsigns held now by people who previously held WP4TB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4TB, oldest first.
- GARCIA, LOUREDES PR2000-05-10 → cancelled 2011-01-25
- Fajar Marrero, Jose M PR2019-10-22 active