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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K1ERO callsign genealogy

Currently held by HALPIN, JOSEPH D

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 K1ERO's current licensee, walking backwards.

  1. K1ERPactive· A
    Arenella, Robert JNHgranted 2021-09-10
  2. N2OAMcancelled· A
    Arenella, Robert JNYgranted 2013-03-22cancelled 2021-09-10

Successor callsigns

Callsigns held now by people who previously held K1ERO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K1ERO, oldest first.

  • HALPIN, JOSEPH D NH
    2010-01-12 → cancelled 2015-11-27
  • Halpin, Ruth F NH
    2026-01-15 active
← Back to K1ERO License history →