Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7IOS callsign genealogy
Currently held by BABCOCK, LAWRENCE 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 W7IOS's current licensee, walking backwards.
- BABCOCK, LAWRENCE MWAgranted 2000-06-09cancelled 2006-01-10
Successor callsigns
Callsigns held now by people who previously held W7IOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7IOS, oldest first.
- BABCOCK, FRANK R WA1995-05-30 → cancelled 1998-08-28
- BABCOCK, LAWRENCE M WA2025-12-24 active