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

K1MSR

Active

Rosenthal, Mark S

Location: Brunswick, ME
Class: Amateur Extra
Granted: 2022-07-15
Expires: 2032-07-15
Previous call: W3MSR
FRN: 0006938377

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Vanity availability

Held

Currently held

K1MSR 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

W3MSRcancelled· E
Rosenthal, Mark SMEgranted 2022-06-11cancelled 2022-07-15
KB3YPBcancelled· G
Rosenthal, Mark SMDgranted 2012-04-25cancelled 2012-05-15

License history

0 events

No recorded events.

More vanity slots coming available

From Maine

All →

KB1ICB 2026-09-10
KB1YQF 2026-09-13
KB1YQH 2026-09-13
KC1VEC 2026-09-17
KD4TCW 2026-09-21

Starting with K1

All →

K1AFR MA · 2026-09-10
K1RAG IN · 2026-09-16
K1CX NH · 2026-09-17
K1JNA CA · 2026-09-20
K1LED RI · 2026-09-21

Full history → Vanity availability → Callsign genealogy →