uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-09

WO2U callsign genealogy

Currently held by RUSSO SR, PAUL C

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 WO2U's current licensee, walking backwards.

  1. W2WJOcancelled· E
    O'Brien, Walter JNJgranted 2003-09-30cancelled 2007-04-20
  2. KC2LBOcancelled· G
    O'BRIEN, WALTER JNJgranted 2003-03-21cancelled 2003-09-30

Successor callsigns

Callsigns held now by people who previously held WO2U.

  1. W9QXcancelled· E
    RUSSO SR, PAUL CNJgranted 1999-05-26cancelled 2001-10-10

All historical holders

Every license row we've seen with the callsign WO2U, oldest first.

  • O'BRIEN, WALTER J NJ
    2017-01-31 active
  • RUSSO SR, PAUL C
    — → cancelled 1999-05-26
← Back to WO2U License history →