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

WR1F callsign genealogy

Currently held by Rivai, Muhammad Subhan

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 WR1F's current licensee, walking backwards.

  1. WA4LLScancelled· E
    Walls, Jeffrey STNgranted 2014-06-06cancelled 2016-04-22
  2. KM4AHGcancelled· T
    Walls, Jeffrey STNgranted 2014-04-17cancelled 2014-06-06

Successor callsigns

Callsigns held now by people who previously held WR1F.

  1. N1IPcancelled· E
    Rivai, Muhammad SubhanMEgranted 2014-04-01cancelled 2024-01-09

All historical holders

Every license row we've seen with the callsign WR1F, oldest first.

  • KRSTANOVIC, SRDJAN NH
    2001-07-11 → cancelled 2013-10-09
  • Rivai, Muhammad Subhan NJ
    2013-12-03 → cancelled 2014-04-01
  • Walls, Jeffrey S TN
    2016-04-22 active
← Back to WR1F License history →