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

K4TSA callsign genealogy

Currently held by MOBBS, STEPHEN B

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 K4TSA's current licensee, walking backwards.

  1. KJ4ZCHcancelled· G
    Still, Terry FSCgranted 2010-11-09cancelled 2019-07-30

Successor callsigns

Callsigns held now by people who previously held K4TSA.

  1. KY4Eactive· E
    STILL, TERRY FSCgranted 2019-10-22
  2. NZ4BMcancelled· E
    MOBBS, STEPHEN BALgranted 2007-12-21cancelled 2008-05-06

All historical holders

Every license row we've seen with the callsign K4TSA, oldest first.

  • MOBBS, STEPHEN B AL
    2006-12-05 → cancelled 2007-12-21
  • STILL, TERRY F SC
    2019-07-30 → cancelled 2019-10-22
← Back to K4TSA License history →