Apparatus

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sensors Mode-S transponder

A81141

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N619MA · CESSNA 208 Caravan · operated by KENMORE AIR HARBOR LLC

Hex
A81141
Octal
52010501
Decimal
11,014,465
Country
US
Tail
N619MA
Type
C208
No current signal · last broadcast 9h ago
Flights observed
268
Distinct callsigns
14
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A81141.

Country allocation

The ICAO 24-bit address A81141 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 14 distinct

Callsign Airline Flights Last seen
KEN2020 - 43 2026-06-30
KEN1818 - 43 2026-07-16
KEN5151 - 31 2026-07-13
KEN4444 - 28 2026-07-14
KEN5050 - 23 2026-07-13
KEN6565 - 20 2026-07-06
KEN3333 - 18 2026-07-04
KEN1710 - 18 2026-07-17
KEN7878 Kenmore Air 13 2026-05-25
KEN3030 - 8 2026-07-10
KEN2839 Kenmore Air 7 2026-04-21
KEN2828 - 6 2026-06-19
KEN1010 Kenmore Air 6 2026-06-04
KEN3232 Kenmore Air 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 KEN1710 - Jul 17, 23:05 UTCJul 18, 00:29 UTC1h 25m
2026-07-17 KEN1710 - Jul 17, 21:10 UTCJul 17, 22:29 UTC1h 20m
2026-07-17 KEN1710 BFI → BFI Jul 17, 19:05 UTCJul 17, 20:25 UTC1h 20m
2026-07-17 KEN1710 - Jul 17, 17:40 UTCJul 17, 18:10 UTC30m
2026-07-17 KEN1710 BFI → ESD Jul 17, 16:10 UTCJul 17, 16:55 UTC45m
2026-07-16 KEN1818 - Jul 16, 23:29 UTCJul 17, 01:25 UTC1h 55m
2026-07-15 KEN1710 - Jul 15, 18:45 UTCJul 15, 20:10 UTC1h 25m
2026-07-15 KEN1710 - Jul 15, 15:55 UTCJul 15, 17:45 UTC1h 50m
2026-07-14 KEN4444 - Jul 14, 22:55 UTCJul 15, 00:15 UTC1h 20m
2026-07-14 KEN4444 - Jul 14, 20:40 UTCJul 14, 22:00 UTC1h 20m
2026-07-14 KEN4444 - Jul 14, 19:35 UTCJul 14, 20:00 UTC25m
2026-07-14 KEN4444 - Jul 14, 18:35 UTCJul 14, 19:00 UTC25m
2026-07-13 KEN5151 - Jul 13, 20:40 UTCJul 13, 22:05 UTC1h 25m
2026-07-13 KEN5151 FRD → BFI Jul 13, 19:30 UTCJul 13, 20:00 UTC30m
2026-07-13 KEN5151 - Jul 13, 18:30 UTCJul 13, 18:55 UTC25m
2026-07-13 KEN5151 - Jul 13, 17:20 UTCJul 13, 17:55 UTC35m
2026-07-13 KEN5050 - Jul 13, 15:55 UTCJul 13, 16:25 UTC30m
2026-07-12 KEN5050 - Jul 12, 23:10 UTCJul 13, 00:45 UTC1h 35m
2026-07-12 KEN5050 - Jul 12, 22:05 UTCJul 12, 22:35 UTC30m
2026-07-12 KEN5050 - Jul 12, 20:40 UTCJul 12, 21:05 UTC25m
2026-07-12 KEN5050 - Jul 12, 18:40 UTCJul 12, 20:01 UTC1h 20m
2026-07-12 KEN5050 ESD → BFI Jul 12, 17:10 UTCJul 12, 17:45 UTC35m
2026-07-12 KEN5050 - Jul 12, 15:55 UTCJul 12, 16:35 UTC40m
2026-07-10 KEN3030 - Jul 10, 21:50 UTCJul 10, 22:05 UTC15m
2026-07-06 KEN6565 - Jul 6, 00:55 UTCJul 6, 01:05 UTC10m
2026-07-05 KEN6565 - Jul 5, 23:10 UTCJul 6, 00:40 UTC1h 30m
2026-07-05 KEN6565 - Jul 5, 22:00 UTCJul 5, 22:30 UTC30m
2026-07-05 KEN6565 - Jul 5, 20:35 UTCJul 5, 21:05 UTC30m
2026-07-05 KEN6565 - Jul 5, 19:35 UTCJul 5, 20:10 UTC35m
2026-07-05 KEN6565 - Jul 5, 18:25 UTCJul 5, 18:55 UTC30m
2026-07-05 KEN6565 - Jul 5, 17:05 UTCJul 5, 18:00 UTC55m
2026-07-05 KEN6565 BFI → FRD Jul 5, 16:05 UTCJul 5, 16:35 UTC30m
2026-07-04 KEN3333 - Jul 4, 20:40 UTCJul 4, 22:15 UTC1h 35m
2026-07-04 KEN3333 - Jul 4, 17:30 UTCJul 4, 19:25 UTC1h 55m
2026-07-04 KEN4444 RSJ → BFI Jul 4, 00:20 UTCJul 4, 00:50 UTC30m
2026-07-03 KEN4444 - Jul 3, 23:00 UTCJul 3, 23:35 UTC35m
2026-07-03 KEN4444 - Jul 3, 20:45 UTCJul 3, 22:15 UTC1h 30m
2026-07-03 KEN4444 - Jul 3, 18:50 UTCJul 3, 20:10 UTC1h 20m
2026-07-03 KEN4444 - Jul 3, 17:50 UTCJul 3, 18:20 UTC30m
2026-07-03 KEN4444 - Jul 3, 16:35 UTCJul 3, 17:15 UTC40m
2026-07-02 KEN6565 BFI → BFI Jul 2, 23:00 UTCJul 3, 00:15 UTC1h 15m
2026-07-02 KEN6565 - Jul 2, 20:50 UTCJul 2, 22:30 UTC1h 40m
2026-07-02 KEN6565 - Jul 2, 18:25 UTCJul 2, 20:00 UTC1h 35m
2026-07-02 KEN6565 - Jul 2, 16:05 UTCJul 2, 17:40 UTC1h 35m
2026-07-01 KEN1818 - Jul 1, 23:05 UTCJul 2, 00:10 UTC1h 5m
2026-07-01 KEN1818 - Jul 1, 20:35 UTCJul 1, 22:00 UTC1h 25m
2026-07-01 KEN1818 - Jul 1, 18:35 UTCJul 1, 19:55 UTC1h 20m
2026-07-01 KEN1818 - Jul 1, 14:35 UTCJul 1, 15:35 UTC1h 0m
2026-07-01 KEN1818 - Jul 1, 02:30 UTCJul 1, 03:00 UTC30m
2026-06-30 KEN2020 - Jun 30, 22:55 UTCJul 1, 00:15 UTC1h 20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N619MA page for operator, model, and routing details .

Mode-S A81141 frequently asked

What is Mode-S code A81141?
A81141 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N619MA.
Where is Mode-S A81141 registered?
Mode-S code A81141 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A81141 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A81141, octal 52010501, decimal 11,014,465.
What flights does A81141 operate?
Mode-S A81141 has broadcast 14 distinct callsigns, including KEN2020, KEN1818, KEN5151, KEN4444, KEN5050.