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sensors Mode-S transponder

A12F74

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17598 · DE HAVILLAND DHC-2 Beaver · operated by KENMORE AIR HARBOR LLC

Hex
A12F74
Octal
50227564
Decimal
10,563,444
Country
US
Tail
N17598
Type
DHC2
No current signal · last broadcast 15d ago
Flights observed
208
Distinct callsigns
1
Country
US
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S A12F74.

Country allocation

The ICAO 24-bit address A12F74 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
N17598 - 208 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N17598 - Jul 26, 22:15 UTCJul 26, 22:30 UTC15m
2026-07-26 N17598 - Jul 26, 21:30 UTCJul 26, 22:05 UTC35m
2026-07-26 N17598 - Jul 26, 20:25 UTCJul 26, 20:40 UTC15m
2026-07-26 N17598 KEH → KEH Jul 26, 17:30 UTCJul 26, 17:55 UTC25m
2026-07-25 N17598 LPS → KEH Jul 25, 22:45 UTCJul 25, 23:30 UTC45m
2026-07-25 N17598 - Jul 25, 21:20 UTCJul 25, 21:55 UTC35m
2026-07-25 N17598 - Jul 25, 18:25 UTCJul 25, 20:25 UTC2h 0m
2026-07-23 N17598 - Jul 23, 00:00 UTCJul 23, 01:55 UTC1h 55m
2026-07-22 N17598 - Jul 22, 18:35 UTCJul 22, 18:55 UTC20m
2026-07-21 N17598 - Jul 21, 22:45 UTCJul 22, 01:40 UTC2h 55m
2026-07-21 N17598 - Jul 21, 21:00 UTCJul 21, 22:00 UTC1h 0m
2026-07-21 N17598 KEH → KEH Jul 21, 18:05 UTCJul 21, 19:50 UTC1h 45m
2026-07-20 N17598 - Jul 20, 21:40 UTCJul 20, 22:05 UTC25m
2026-07-20 N17598 - Jul 20, 17:30 UTCJul 20, 20:15 UTC2h 45m
2026-07-20 N17598 - Jul 20, 01:15 UTCJul 20, 02:15 UTC1h 0m
2026-07-19 N17598 - Jul 19, 22:15 UTCJul 19, 23:30 UTC1h 15m
2026-07-19 N17598 - Jul 19, 18:10 UTCJul 19, 20:00 UTC1h 50m
2026-07-19 N17598 - Jul 19, 16:00 UTCJul 19, 17:40 UTC1h 40m
2026-07-18 N17598 - Jul 18, 23:35 UTCJul 19, 00:45 UTC1h 10m
2026-07-18 N17598 - Jul 18, 21:05 UTCJul 18, 22:55 UTC1h 50m
2026-07-18 N17598 KEH → DHB Jul 18, 19:25 UTCJul 18, 20:25 UTC1h 0m
2026-07-18 N17598 - Jul 18, 17:30 UTCJul 18, 18:45 UTC1h 15m
2026-07-18 N17598 KEH → KEH Jul 18, 00:19 UTCJul 18, 02:35 UTC2h 15m
2026-07-17 N17598 - Jul 17, 21:00 UTCJul 17, 23:00 UTC2h 0m
2026-07-17 N17598 - Jul 17, 18:05 UTCJul 17, 20:10 UTC2h 5m
2026-07-15 N17598 KEH → KEH Jul 15, 23:15 UTCJul 16, 01:50 UTC2h 35m
2026-07-15 N17598 - Jul 15, 21:40 UTCJul 15, 22:05 UTC25m
2026-07-13 N17598 - Jul 13, 19:35 UTCJul 13, 19:50 UTC15m
2026-07-13 N17598 - Jul 13, 18:05 UTCJul 13, 18:50 UTC45m
2026-07-13 N17598 - Jul 13, 17:10 UTCJul 13, 17:20 UTC10m
2026-07-13 N17598 - Jul 13, 15:45 UTCJul 13, 16:35 UTC50m
2026-07-12 N17598 KEH → KEH Jul 12, 21:00 UTCJul 13, 00:40 UTC3h 40m
2026-07-12 N17598 - Jul 12, 17:20 UTCJul 12, 20:30 UTC3h 10m
2026-07-12 N17598 - Jul 12, 16:15 UTCJul 12, 16:45 UTC30m
2026-07-12 N17598 KEH → KEH Jul 12, 00:05 UTCJul 12, 01:55 UTC1h 50m
2026-07-11 N17598 - Jul 11, 22:15 UTCJul 11, 23:00 UTC45m
2026-07-11 N17598 - Jul 11, 20:55 UTCJul 11, 21:35 UTC40m
2026-07-11 N17598 - Jul 11, 18:05 UTCJul 11, 19:45 UTC1h 40m
2026-07-11 N17598 - Jul 11, 00:05 UTCJul 11, 01:45 UTC1h 40m
2026-07-10 N17598 - Jul 10, 22:30 UTCJul 10, 23:00 UTC30m
2026-07-10 N17598 - Jul 10, 20:30 UTCJul 10, 20:55 UTC25m
2026-07-10 N17598 - Jul 10, 17:35 UTCJul 10, 19:55 UTC2h 20m
2026-07-10 N17598 - Jul 10, 01:55 UTCJul 10, 03:00 UTC1h 5m
2026-07-10 N17598 - Jul 10, 01:00 UTCJul 10, 01:25 UTC25m
2026-07-09 N17598 KEH → KEH Jul 9, 01:00 UTCJul 9, 01:25 UTC25m
2026-07-08 N17598 - Jul 8, 21:15 UTCJul 8, 23:15 UTC2h 0m
2026-07-08 N17598 - Jul 8, 18:10 UTCJul 8, 20:25 UTC2h 15m
2026-07-05 N17598 KEH → KEH Jul 5, 21:25 UTCJul 5, 23:10 UTC1h 45m
2026-07-05 N17598 KEH → KEH Jul 5, 18:15 UTCJul 5, 19:55 UTC1h 40m
2026-07-05 N17598 FBS → KEH Jul 5, 17:00 UTCJul 5, 17:40 UTC40m

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 N17598 page for operator, model, and routing details .

Mode-S A12F74 frequently asked

What is Mode-S code A12F74?
A12F74 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17598.
Where is Mode-S A12F74 registered?
Mode-S code A12F74 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 A12F74 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12F74, octal 50227564, decimal 10,563,444.
What flights does A12F74 operate?
Mode-S A12F74 has broadcast 1 distinct callsign, including N17598.