Confidence: Medium · Source: FCC ULS · As of 2026-09-10

N6MTB

Active

Porter Jr., William M

Location: VISTA, CA
Class: Amateur Extra
Granted: 2022-09-24
Expires: 2032-09-24
Previous call: KN6VRF
FRN: 0032689895

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Vanity availability

Held

Currently held

N6MTB 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

KN6VRFcancelled· G
Porter Jr., William MCAgranted 2022-09-03cancelled 2022-09-24

Prior holders later became

KB6MTBactive· T
Larson, Jeff TCAgranted 2019-03-09

License history

0 events

No recorded events.

More vanity slots coming available

From California

All →

AC2TX 2026-09-10
K6DJM 2026-09-10
KC6JGS 2026-09-10
KC6KGL 2026-09-10
KC6VEU 2026-09-10

Starting with N6

All →

N6SDC CA · 2026-09-14
N6TOE WA · 2026-10-01
N6SLW CA · 2026-10-03
N6ZH NC · 2026-10-04
N6EIS CA · 2026-10-05

Full history → Vanity availability → Callsign genealogy →