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

N4MMR

Active

Black, John R

Location: Dunedin, FL
Class: Amateur Extra
Granted: 2019-09-24
Expires: 2029-09-24
Previous call: W3RBX
FRN: 0019544519

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Vanity availability

Held

Currently held

N4MMR 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

W3RBXcancelled· G
Black, John RFLgranted 2010-03-06cancelled 2019-09-24
KB3TYQcancelled· G
Black, John RPAgranted 2010-02-02cancelled 2010-03-06

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

All →

K4CYG 2026-09-10
K4YDD 2026-09-10
KG4QXI 2026-09-10
KG4RVV 2026-09-10
KG4VAB 2026-09-10

Starting with N4

All →

N4WKB FL · 2026-09-10
N4MOC GA · 2026-09-14
N4YTT KY · 2026-09-14
N4PWQ TN · 2026-09-17
N4RIM NC · 2026-09-21

Full history → Vanity availability → Callsign genealogy →