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

W5KRM callsign genealogy

Currently held by Hays, Christopher 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 W5KRM's current licensee, walking backwards.

  1. WB9STUcancelled· G
    Mahnke, Kenneth RTXgranted 2004-07-20cancelled 2008-08-26
  2. KD6DHLcancelled· G
    Mahnke, Kenneth RTXgranted 2001-10-23cancelled 2004-07-20

Successor callsigns

Callsigns held now by people who previously held W5KRM.

  1. N0SGHactive· G
    Mahnke, Kenneth RTXgranted 2025-06-13
  2. WC5RRcancelled· E
    Hays, Christopher BTXgranted 2003-06-27cancelled 2004-01-23

All historical holders

Every license row we've seen with the callsign W5KRM, oldest first.

  • Hays, Christopher B TX
    2002-08-10 → cancelled 2003-06-27
  • Mahnke, Kenneth R TX
    2008-08-26 → cancelled 2015-07-17
← Back to W5KRM License history →