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

N1SP callsign genealogy

Currently held by PORTER, SCOTT W

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 N1SP's current licensee, walking backwards.

  1. AA1UNcancelled· E
    HORN, RANDAL JVTgranted 2002-10-09cancelled 2003-03-15
  2. WT0Aactive· E
    BURKHARDT, JOHN EMNgranted 2024-05-29
  3. KF0AEcancelled· E
    BURKHARDT, JOHN EMNgranted 2023-06-27cancelled 2024-05-29
  4. AE0UQcancelled· E
    BURKHARDT, JOHN EMNgranted 2023-01-31cancelled 2023-06-27
  5. KF0LJScancelled· E
    BURKHARDT, JOHN EMNgranted 2023-01-31cancelled 2023-05-15

Successor callsigns

Callsigns held now by people who previously held N1SP.

  1. WA1YTWexpired· E
    PORTER, SCOTT WMAgranted 2010-03-27cancelled 2022-06-18

All historical holders

Every license row we've seen with the callsign N1SP, oldest first.

  • PORTER, SCOTT W NH
    1998-01-30 → cancelled 2000-06-17
  • HORN, RANDAL J VT
    2023-01-31 active
← Back to N1SP License history →