Apparatus

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sensors Mode-S transponder

A2F739

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N290TX · EMBRAER EMB-505 Phenom 300 · operated by TRANSMEDICS INC

Hex
A2F739
Octal
50573471
Decimal
10,680,121
Country
US
Tail
N290TX
Type
E55P
No current signal · last broadcast 2h ago
Flights observed
151
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A2F739.

Country allocation

The ICAO 24-bit address A2F739 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
YEL90 - 151 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 YEL90 - Jul 20, 16:50 UTCJul 20, 17:25 UTC35m
2026-07-20 YEL90 - Jul 20, 09:10 UTCJul 20, 10:55 UTC1h 45m
2026-07-19 YEL90 - Jul 19, 12:55 UTCJul 19, 13:45 UTC50m
2026-07-19 YEL90 TEB → MSY Jul 19, 09:20 UTCJul 19, 12:00 UTC2h 40m
2026-07-18 YEL90 - Jul 18, 13:15 UTCJul 18, 14:00 UTC45m
2026-07-18 YEL90 - Jul 18, 10:40 UTCJul 18, 12:20 UTC1h 40m
2026-07-18 YEL90 - Jul 18, 06:05 UTCJul 18, 06:55 UTC50m
2026-07-18 YEL90 - Jul 18, 00:55 UTCJul 18, 01:50 UTC55m
2026-07-17 YEL90 - Jul 17, 08:15 UTCJul 17, 09:45 UTC1h 30m
2026-07-17 YEL90 - Jul 17, 06:45 UTCJul 17, 07:35 UTC50m
2026-07-17 YEL90 - Jul 17, 04:04 UTCJul 17, 05:04 UTC1h 0m
2026-07-17 YEL90 - Jul 17, 00:55 UTCJul 17, 01:59 UTC1h 5m
2026-07-16 YEL90 - Jul 16, 07:10 UTCJul 16, 08:10 UTC1h 0m
2026-07-16 YEL90 ATL → TEB Jul 16, 04:10 UTCJul 16, 06:05 UTC1h 55m
2026-07-12 YEL90 - Jul 12, 02:55 UTCJul 12, 05:25 UTC2h 30m
2026-07-11 YEL90 - Jul 11, 20:10 UTCJul 11, 21:00 UTC50m
2026-07-11 YEL90 - Jul 11, 08:30 UTCJul 11, 09:50 UTC1h 20m
2026-07-11 YEL90 - Jul 11, 06:50 UTCJul 11, 07:45 UTC55m
2026-07-10 YEL90 - Jul 10, 23:45 UTCJul 11, 00:40 UTC55m
2026-07-10 YEL90 - Jul 10, 06:25 UTCJul 10, 07:00 UTC35m
2026-07-10 YEL90 - Jul 10, 00:45 UTCJul 10, 01:05 UTC20m
2026-07-09 YEL90 - Jul 9, 21:30 UTCJul 9, 22:25 UTC55m
2026-07-09 YEL90 - Jul 9, 01:15 UTCJul 9, 02:05 UTC50m
2026-07-08 YEL90 BOI → SCF Jul 8, 07:25 UTCJul 8, 09:05 UTC1h 40m
2026-07-08 YEL90 - Jul 8, 04:40 UTCJul 8, 06:20 UTC1h 40m
2026-07-07 YEL90 - Jul 7, 09:15 UTCJul 7, 10:35 UTC1h 20m
2026-07-07 YEL90 LAS → SJC Jul 7, 07:40 UTCJul 7, 08:40 UTC1h 0m
2026-07-07 YEL90 SCF → LAS Jul 7, 04:35 UTCJul 7, 05:15 UTC40m
2026-07-04 YEL90 - Jul 4, 16:55 UTCJul 4, 17:40 UTC45m
2026-07-04 YEL90 SJC → LAS Jul 4, 14:50 UTCJul 4, 15:50 UTC1h 0m
2026-07-03 YEL90 - Jul 3, 10:25 UTCJul 3, 11:30 UTC1h 5m
2026-07-02 YEL90 - Jul 2, 18:45 UTCJul 2, 19:55 UTC1h 10m
2026-07-02 YEL90 - Jul 2, 16:55 UTCJul 2, 17:50 UTC55m
2026-07-02 YEL90 - Jul 2, 13:20 UTCJul 2, 15:25 UTC2h 5m
2026-06-30 YEL90 - Jun 30, 18:40 UTCJun 30, 20:55 UTC2h 15m
2026-06-30 YEL90 MCC → PDX Jun 30, 11:15 UTCJun 30, 12:30 UTC1h 15m
2026-06-30 YEL90 - Jun 30, 08:30 UTCJun 30, 09:45 UTC1h 15m
2026-06-30 YEL90 - Jun 30, 05:00 UTCJun 30, 05:55 UTC55m
2026-06-28 YEL90 - Jun 28, 03:09 UTCJun 28, 03:55 UTC45m
2026-06-27 YEL90 - Jun 27, 18:29 UTCJun 27, 19:15 UTC45m
2026-06-23 YEL90 - Jun 23, 07:55 UTCJun 23, 08:45 UTC50m
2026-06-23 YEL90 - Jun 23, 06:15 UTCJun 23, 06:49 UTC35m
2026-06-22 YEL90 - Jun 22, 05:20 UTCJun 22, 07:10 UTC1h 50m
2026-06-21 YEL90 - Jun 21, 22:10 UTCJun 21, 22:54 UTC45m
2026-06-21 YEL90 - Jun 21, 03:14 UTCJun 21, 03:44 UTC30m
2026-06-20 YEL90 - Jun 20, 21:25 UTCJun 20, 22:00 UTC35m
2026-06-16 YEL90 - Jun 16, 21:10 UTCJun 16, 22:00 UTC50m
2026-06-16 YEL90 - Jun 16, 18:20 UTCJun 16, 19:19 UTC1h 0m
2026-06-16 YEL90 - Jun 16, 04:35 UTCJun 16, 06:04 UTC1h 30m
2026-06-16 YEL90 - Jun 16, 02:15 UTCJun 16, 03:50 UTC1h 35m

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 N290TX page for operator, model, and routing details .

Mode-S A2F739 frequently asked

What is Mode-S code A2F739?
A2F739 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N290TX.
Where is Mode-S A2F739 registered?
Mode-S code A2F739 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 A2F739 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2F739, octal 50573471, decimal 10,680,121.
What flights does A2F739 operate?
Mode-S A2F739 has broadcast 1 distinct callsign, including YEL90.