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

AC4JM

Active

MODLIN, JEFFREY

Location: Boynton Beach, FL
Class: Amateur Extra
Granted: 2023-02-15
Expires: 2033-02-15
Previous call: KD4ZNC
FRN: 0003551363

Get notified about status changes and vanity availability for this callsign.

Vanity availability

Held

Currently held

AC4JM is held by an active license; it isn't a vanity slot right now.

Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).

Callsign genealogy

Full chain →

Previously held by current licensee

KD4ZNCcancelled· E
MODLIN, JEFFREYFLgranted 2004-08-10cancelled 2013-02-15

Prior holders later became

K1XYactive· E
HENDERSON, BRIAN FGAgranted 2017-03-01

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

All →

K4HCL 2026-09-09
KG4UZU 2026-09-09
KG4UZX 2026-09-09
KK4LMR 2026-09-09
W3EFZ 2026-09-09

Starting with AC4

All →

AC4VP FL · 2026-09-14
AC4UX CA · 2026-09-16
AC4SQ GA · 2026-09-19
AC4ZY TN · 2026-09-21
AC4FX TN · 2026-10-23

Full history → Vanity availability → Callsign genealogy →