Apparatus

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sensors Mode-S transponder

A614B0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N491K · DE HAVILLAND DHC-3 Otter · operated by KATMAI AIR LLC

Hex
A614B0
Octal
51412260
Decimal
10,884,272
Country
US
Tail
N491K
Type
DHC3
No current signal · last broadcast 13h ago
Flights observed
140
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A614B0.

Country allocation

The ICAO 24-bit address A614B0 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 1 distinct

Callsign Airline Flights Last seen
N491K - 140 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N491K - Jul 18, 02:00 UTCJul 18, 02:14 UTC15m
2026-07-17 N491K - Jul 17, 23:10 UTCJul 18, 01:00 UTC1h 50m
2026-07-17 N491K - Jul 17, 21:00 UTCJul 17, 22:00 UTC1h 0m
2026-07-17 N491K AKN → BKF Jul 17, 17:50 UTCJul 17, 19:09 UTC1h 20m
2026-07-17 N491K BKF → AKN Jul 17, 01:49 UTCJul 17, 02:10 UTC20m
2026-07-17 N491K - Jul 17, 00:40 UTCJul 17, 01:15 UTC35m
2026-07-16 N491K - Jul 16, 21:40 UTCJul 16, 22:00 UTC20m
2026-07-16 N491K - Jul 16, 20:55 UTCJul 16, 21:10 UTC15m
2026-07-16 N491K - Jul 16, 18:00 UTCJul 16, 18:19 UTC20m
2026-07-16 N491K AKN → AKN Jul 16, 16:05 UTCJul 16, 16:49 UTC45m
2026-07-16 N491K - Jul 16, 02:15 UTCJul 16, 02:30 UTC15m
2026-07-16 N491K - Jul 16, 00:55 UTCJul 16, 01:40 UTC45m
2026-07-15 N491K BKF → BKF Jul 15, 23:25 UTCJul 16, 00:10 UTC45m
2026-07-15 N491K - Jul 15, 21:15 UTCJul 15, 21:30 UTC15m
2026-07-15 N491K - Jul 15, 19:50 UTCJul 15, 20:00 UTC10m
2026-07-15 N491K - Jul 15, 19:00 UTCJul 15, 19:15 UTC15m
2026-07-15 N491K - Jul 15, 00:15 UTCJul 15, 02:10 UTC1h 55m
2026-07-14 N491K - Jul 14, 23:25 UTCJul 14, 23:40 UTC15m
2026-07-14 N491K - Jul 14, 21:45 UTCJul 14, 22:00 UTC15m
2026-07-14 N491K - Jul 14, 20:50 UTCJul 14, 21:05 UTC15m
2026-07-14 N491K - Jul 14, 18:35 UTCJul 14, 18:55 UTC20m
2026-07-14 N491K - Jul 14, 16:05 UTCJul 14, 17:55 UTC1h 50m
2026-07-14 N491K - Jul 14, 02:25 UTCJul 14, 02:35 UTC10m
2026-07-13 N491K - Jul 13, 23:20 UTCJul 14, 01:00 UTC1h 40m
2026-07-13 N491K - Jul 13, 21:05 UTCJul 13, 21:55 UTC50m
2026-07-13 N491K AKN → BKF Jul 13, 18:10 UTCJul 13, 18:25 UTC15m
2026-07-13 N491K AKN → AKN Jul 13, 15:50 UTCJul 13, 17:30 UTC1h 40m
2026-07-13 N491K - Jul 13, 02:01 UTCJul 13, 02:10 UTC10m
2026-07-12 N491K - Jul 12, 23:35 UTCJul 13, 01:25 UTC1h 50m
2026-07-12 N491K - Jul 12, 21:00 UTCJul 12, 22:00 UTC1h 0m
2026-07-12 N491K - Jul 12, 17:50 UTCJul 12, 19:20 UTC1h 30m
2026-07-12 N491K - Jul 12, 16:01 UTCJul 12, 17:15 UTC1h 15m
2026-07-12 N491K - Jul 12, 01:55 UTCJul 12, 02:10 UTC15m
2026-07-11 N491K - Jul 11, 23:30 UTCJul 12, 01:00 UTC1h 30m
2026-07-11 N491K - Jul 11, 21:35 UTCJul 11, 21:50 UTC15m
2026-07-11 N491K - Jul 11, 20:55 UTCJul 11, 21:05 UTC10m
2026-07-11 N491K - Jul 11, 18:20 UTCJul 11, 19:50 UTC1h 30m
2026-07-11 N491K - Jul 11, 16:25 UTCJul 11, 17:25 UTC1h 0m
2026-07-11 N491K BKF → AKN Jul 11, 02:05 UTCJul 11, 02:20 UTC15m
2026-07-10 N491K - Jul 10, 23:35 UTCJul 11, 01:25 UTC1h 50m
2026-07-10 N491K - Jul 10, 20:50 UTCJul 10, 21:40 UTC50m
2026-07-10 N491K - Jul 10, 17:30 UTCJul 10, 18:45 UTC1h 15m
2026-07-10 N491K AKN → AKN Jul 10, 15:55 UTCJul 10, 16:45 UTC50m
2026-07-10 N491K - Jul 10, 00:55 UTCJul 10, 01:10 UTC15m
2026-07-09 N491K - Jul 9, 23:30 UTCJul 10, 00:25 UTC55m
2026-07-09 N491K - Jul 9, 21:45 UTCJul 9, 22:00 UTC15m
2026-07-09 N491K - Jul 9, 20:55 UTCJul 9, 21:10 UTC15m
2026-07-09 N491K - Jul 9, 17:15 UTCJul 9, 18:55 UTC1h 40m
2026-07-09 N491K - Jul 9, 02:00 UTCJul 9, 02:15 UTC15m
2026-07-08 N491K - Jul 8, 23:15 UTCJul 9, 01:10 UTC1h 55m

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 N491K page for operator, model, and routing details .

Mode-S A614B0 frequently asked

What is Mode-S code A614B0?
A614B0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N491K.
Where is Mode-S A614B0 registered?
Mode-S code A614B0 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 A614B0 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A614B0, octal 51412260, decimal 10,884,272.
What flights does A614B0 operate?
Mode-S A614B0 has broadcast 1 distinct callsign, including N491K.