Apparatus

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sensors Mode-S transponder

A904F5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N680TW · BEECH 200 Super King Air · operated by BILLINGS CLINIC

Hex
A904F5
Octal
52202365
Decimal
11,076,853
Country
US
Tail
N680TW
Type
BE20
No current signal · last broadcast 6h ago
Flights observed
141
Distinct callsigns
1
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A904F5.

Country allocation

The ICAO 24-bit address A904F5 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
N680TW - 141 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N680TW - Jul 23, 08:20 UTCJul 23, 08:55 UTC35m
2026-07-23 N680TW - Jul 23, 05:30 UTCJul 23, 06:00 UTC30m
2026-07-22 N680TW - Jul 22, 22:50 UTCJul 23, 00:05 UTC1h 15m
2026-07-22 N680TW - Jul 22, 19:45 UTCJul 22, 20:00 UTC15m
2026-07-22 N680TW - Jul 22, 18:35 UTCJul 22, 18:45 UTC10m
2026-07-22 N680TW - Jul 22, 16:10 UTCJul 22, 16:25 UTC15m
2026-07-22 N680TW - Jul 22, 14:40 UTCJul 22, 14:50 UTC10m
2026-07-22 N680TW - Jul 22, 12:10 UTCJul 22, 12:30 UTC20m
2026-07-21 N680TW - Jul 21, 23:45 UTCJul 22, 00:30 UTC45m
2026-07-21 N680TW - Jul 21, 22:00 UTCJul 21, 22:20 UTC20m
2026-07-21 N680TW - Jul 21, 15:45 UTCJul 21, 16:50 UTC1h 5m
2026-07-21 N680TW - Jul 21, 07:10 UTCJul 21, 07:20 UTC10m
2026-07-21 N680TW - Jul 21, 05:45 UTCJul 21, 05:55 UTC10m
2026-07-21 N680TW - Jul 21, 03:55 UTCJul 21, 04:15 UTC20m
2026-07-20 N680TW - Jul 20, 18:00 UTCJul 20, 19:35 UTC1h 35m
2026-07-20 N680TW - Jul 20, 12:00 UTCJul 20, 13:30 UTC1h 30m
2026-07-20 N680TW - Jul 20, 07:30 UTCJul 20, 08:05 UTC35m
2026-07-20 N680TW - Jul 20, 04:35 UTCJul 20, 05:05 UTC30m
2026-07-19 N680TW - Jul 19, 19:00 UTCJul 19, 19:10 UTC10m
2026-07-19 N680TW - Jul 19, 16:00 UTCJul 19, 17:35 UTC1h 35m
2026-07-17 N680TW - Jul 17, 15:15 UTCJul 17, 15:49 UTC35m
2026-07-17 N680TW - Jul 17, 12:35 UTCJul 17, 13:05 UTC30m
2026-07-17 N680TW - Jul 17, 06:50 UTCJul 17, 07:05 UTC15m
2026-07-16 N680TW - Jul 16, 22:49 UTCJul 16, 22:59 UTC10m
2026-07-16 N680TW - Jul 16, 03:00 UTCJul 16, 03:10 UTC10m
2026-07-15 N680TW - Jul 15, 16:20 UTCJul 15, 17:25 UTC1h 5m
2026-07-15 N680TW - Jul 15, 00:00 UTCJul 15, 01:40 UTC1h 40m
2026-07-14 N680TW - Jul 14, 19:55 UTCJul 14, 21:35 UTC1h 40m
2026-07-14 N680TW - Jul 14, 01:55 UTCJul 14, 02:10 UTC15m
2026-07-13 N680TW - Jul 13, 22:05 UTCJul 13, 22:15 UTC10m
2026-07-13 N680TW - Jul 13, 16:35 UTCJul 13, 17:10 UTC35m
2026-07-13 N680TW - Jul 13, 13:35 UTCJul 13, 14:05 UTC30m
2026-07-13 N680TW - Jul 13, 12:40 UTCJul 13, 12:55 UTC15m
2026-07-11 N680TW - Jul 11, 20:35 UTCJul 11, 21:10 UTC35m
2026-07-11 N680TW - Jul 11, 18:30 UTCJul 11, 19:00 UTC30m
2026-07-11 N680TW - Jul 11, 17:35 UTCJul 11, 17:45 UTC10m
2026-07-11 N680TW - Jul 11, 08:40 UTCJul 11, 08:50 UTC10m
2026-07-07 N680TW - Jul 7, 16:20 UTCJul 7, 17:55 UTC1h 35m
2026-07-07 N680TW - Jul 7, 12:05 UTCJul 7, 13:40 UTC1h 35m
2026-07-04 N680TW - Jul 4, 07:20 UTCJul 4, 07:30 UTC10m
2026-07-04 N680TW - Jul 4, 05:45 UTCJul 4, 05:55 UTC10m
2026-07-04 N680TW - Jul 4, 03:35 UTCJul 4, 03:50 UTC15m
2026-07-02 N680TW - Jul 2, 09:00 UTCJul 2, 09:10 UTC10m
2026-07-01 N680TW - Jul 1, 17:50 UTCJul 1, 18:00 UTC10m
2026-07-01 N680TW - Jul 1, 05:50 UTCJul 1, 06:00 UTC10m
2026-06-29 N680TW - Jun 29, 00:10 UTCJun 29, 00:20 UTC10m
2026-06-28 N680TW - Jun 28, 06:30 UTCJun 28, 08:05 UTC1h 35m
2026-06-28 N680TW - Jun 28, 02:39 UTCJun 28, 04:29 UTC1h 50m
2026-06-27 N680TW - Jun 27, 23:50 UTCJun 28, 01:19 UTC1h 30m
2026-06-27 N680TW - Jun 27, 19:49 UTCJun 27, 21:29 UTC1h 40m

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 N680TW page for operator, model, and routing details .

Mode-S A904F5 frequently asked

What is Mode-S code A904F5?
A904F5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N680TW.
Where is Mode-S A904F5 registered?
Mode-S code A904F5 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 A904F5 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A904F5, octal 52202365, decimal 11,076,853.
What flights does A904F5 operate?
Mode-S A904F5 has broadcast 1 distinct callsign, including N680TW.