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

KP4CK callsign genealogy

Currently held by AMATEUR LEAGUE FOUNDERS OF PUERTO RICO

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 KP4CK's current licensee, walking backwards.

  1. KP4AEEcancelled· E
    CINTRON VELAZQUEZ, WALTERPRgranted 2021-05-11cancelled 2022-09-20
  2. NP3CKcancelled· G
    CINTRON VELAZQUEZ, WALTERPRgranted 2016-04-19cancelled 2021-05-11

Successor callsigns

Callsigns held now by people who previously held KP4CK.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KP4CK, oldest first.

  • AMATEUR LEAGUE FOUNDERS OF PUERTO RICO PR
    2006-09-14 → cancelled 2018-12-11
  • CINTRON VELAZQUEZ, WALTER PR
    2022-09-20 active
← Back to KP4CK License history →