uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

W1ABC callsign genealogy

Currently held by PENTA, ANTHONY J

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 W1ABC's current licensee, walking backwards.

  1. W5VVCcancelled· G
    Shirrell, Michael DTXgranted 2025-12-09cancelled 2026-03-24
  2. W1BCBcancelled· G
    Shirrell, Michael DTXgranted 2025-09-12cancelled 2025-12-09
  3. KI5QWMcancelled· G
    Shirrell, Michael DTXgranted 2021-07-15cancelled 2025-09-12

Successor callsigns

Callsigns held now by people who previously held W1ABC.

  1. N1APactive· E
    PENTA, ANTHONY JMAgranted 2021-07-16

All historical holders

Every license row we've seen with the callsign W1ABC, oldest first.

  • PENTA, ANTHONY J MA
    1998-04-15 → cancelled 2001-10-12
  • SULLIVAN, PETER J MA
    2013-11-07 → cancelled 2026-03-07
  • Shirrell, Michael D TX
    2026-03-24 active
← Back to W1ABC License history →