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

K0JR callsign genealogy

Currently held by ROGERS, JOHN O

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 K0JR's current licensee, walking backwards.

  1. K9JRKcancelled· E
    KOLMER, JOSEPH RPAgranted 2019-09-17cancelled 2021-11-19
  2. WN9BDNcancelled· E
    KOLMER, JOSEPH ROHgranted 2016-05-13cancelled 2019-09-17

Successor callsigns

Callsigns held now by people who previously held K0JR.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K0JR, oldest first.

  • CARTER JR, MYRON B MO
    2009-09-04 → cancelled 2021-11-02
  • KOLMER, JOSEPH R PA
    2021-11-19 active
  • ROGERS, JOHN O
    — → cancelled 1997-08-19
← Back to K0JR License history →