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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

W1JSP callsign genealogy

Currently held by PLUMMER, JAMES S

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 W1JSP's current licensee, walking backwards.

  1. N1SDXcancelled· G
    Peterson, John SRIgranted 2026-02-24cancelled 2026-03-24
  2. N5JSPcancelled· G
    Peterson, John SRIgranted 2024-04-02cancelled 2026-02-24
  3. KC1UJIcancelled· T
    Peterson, John SRIgranted 2024-03-14cancelled 2024-04-02

Successor callsigns

Callsigns held now by people who previously held W1JSP.

  1. W1SRVcancelled· E
    PLUMMER, JAMES SMAgranted 2013-09-06cancelled 2013-10-17

All historical holders

Every license row we've seen with the callsign W1JSP, oldest first.

  • PLUMMER, JAMES S MA
    2010-10-06 → cancelled 2013-09-06
  • PLUMMER, JAMES S MA
    2013-10-17 → cancelled 2026-03-07
  • Peterson, John S RI
    2026-03-24 active
← Back to W1JSP License history →