uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

W1OKC callsign genealogy

Currently held by HILL Sr., MARK 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 W1OKC's current licensee, walking backwards.

  1. K7GPDcancelled· T
    HILL Sr., MARK JAZgranted 2007-06-19cancelled 2012-09-18

Successor callsigns

Callsigns held now by people who previously held W1OKC.

  1. K5KTOactive· T
    HILL Sr., MARK JOKgranted 2021-10-09
  2. K7GPDcancelled· T
    HILL Sr., MARK JAZgranted 2007-06-19cancelled 2012-09-18

All historical holders

Every license row we've seen with the callsign W1OKC, oldest first.

  • HILL Sr., MARK J AZ
    2003-10-24 → cancelled 2007-06-19
  • HILL Sr., MARK J OK
    2012-09-18 → cancelled 2021-10-09
← Back to W1OKC License history →