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

W4JPP callsign genealogy

Currently held by posk 609, joseph p

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 W4JPP's current licensee, walking backwards.

  1. KG4ULLcancelled· G
    Posk, Joseph PFLgranted 2001-08-21cancelled 2002-08-16
  2. KG4OXPcancelled· G
    Posk, Joseph PFLgranted 2001-08-21cancelled 2002-07-27

Successor callsigns

Callsigns held now by people who previously held W4JPP.

  1. W1JPPactive· G
    Posk, Joseph PRIgranted 2021-07-07
← Back to W4JPP License history →