Apparatus

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sensors Mode-S transponder

A7E839

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6086Z · operated by US ARMY

Hex
A7E839
Octal
51764071
Decimal
11,003,961
Country
US
Tail
N6086Z
Type
H500
No current signal · last broadcast Jul 8, 15:50 UTC
Flights observed
60
Distinct callsigns
11
Country
US
Last broadcast
Jul 8, 15:50 UTC

Last known position

Most recent position reported by Mode-S A7E839.

Country allocation

The ICAO 24-bit address A7E839 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 11 distinct

Callsign Airline Flights Last seen
EVAL22 - 17 2026-07-02
EVAL20 - 10 2026-06-03
EVAL13 - 10 2026-07-07
EVAL01 - 6 2026-06-26
EVAL04 - 5 2026-06-15
EVAL76 - 4 2026-06-24
EVAL78 - 3 2026-05-14
EVAL33 - 2 2026-05-01
EVAL95 - 1 2026-04-22
EVAL18 - 1 2026-07-08
EVAL11 - 1 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 EVAL18 HUA → HUA Jul 8, 14:25 UTCJul 8, 15:50 UTC1h 25m
2026-07-07 EVAL13 - Jul 7, 14:55 UTCJul 7, 16:00 UTC1h 5m
2026-07-02 EVAL22 - Jul 2, 18:05 UTCJul 2, 18:15 UTC10m
2026-07-02 EVAL22 - Jul 2, 16:30 UTCJul 2, 16:45 UTC15m
2026-07-01 EVAL22 - Jul 1, 21:15 UTCJul 1, 22:40 UTC1h 25m
2026-06-26 EVAL01 HUA → HUA Jun 26, 14:39 UTCJun 26, 16:09 UTC1h 30m
2026-06-25 EVAL22 - Jun 25, 15:59 UTCJun 25, 17:14 UTC1h 15m
2026-06-24 EVAL11 - Jun 24, 16:59 UTCJun 24, 18:34 UTC1h 35m
2026-06-24 EVAL76 - Jun 24, 15:44 UTCJun 24, 16:09 UTC25m
2026-06-24 EVAL76 - Jun 24, 14:15 UTCJun 24, 14:24 UTC10m
2026-06-22 EVAL22 HUA → HUA Jun 22, 15:10 UTCJun 22, 15:35 UTC25m
2026-06-22 EVAL22 HUA → HUA Jun 22, 14:24 UTCJun 22, 14:59 UTC35m
2026-06-17 EVAL76 - Jun 17, 15:10 UTCJun 17, 15:35 UTC25m
2026-06-17 EVAL76 - Jun 17, 14:05 UTCJun 17, 14:30 UTC25m
2026-06-16 EVAL01 - Jun 16, 18:45 UTCJun 16, 20:10 UTC1h 26m
2026-06-15 EVAL04 - Jun 15, 16:55 UTCJun 15, 17:10 UTC15m
2026-06-15 EVAL04 - Jun 15, 15:19 UTCJun 15, 15:40 UTC20m
2026-06-11 EVAL01 - Jun 11, 15:50 UTCJun 11, 16:00 UTC10m
2026-06-11 EVAL01 - Jun 11, 14:15 UTCJun 11, 14:35 UTC20m
2026-06-10 EVAL22 - Jun 10, 19:05 UTCJun 10, 19:40 UTC35m
2026-06-10 EVAL22 HUA → HUA Jun 10, 17:10 UTCJun 10, 17:20 UTC10m
2026-06-10 EVAL22 HUA → HUA Jun 10, 16:30 UTCJun 10, 17:00 UTC30m
2026-06-10 EVAL22 HUA → HUA Jun 10, 15:20 UTCJun 10, 16:00 UTC40m
2026-06-09 EVAL22 - Jun 9, 19:20 UTCJun 9, 19:50 UTC30m
2026-06-09 EVAL22 - Jun 9, 14:50 UTCJun 9, 15:25 UTC35m
2026-06-05 EVAL13 - Jun 5, 20:00 UTCJun 5, 20:10 UTC10m
2026-06-05 EVAL13 - Jun 5, 19:15 UTCJun 5, 19:25 UTC10m
2026-06-05 EVAL13 - Jun 5, 18:00 UTCJun 5, 18:25 UTC25m
2026-06-05 EVAL13 - Jun 5, 15:20 UTCJun 5, 15:50 UTC30m
2026-06-05 EVAL13 - Jun 5, 13:50 UTCJun 5, 14:00 UTC10m
2026-06-03 EVAL20 - Jun 3, 22:00 UTCJun 3, 22:15 UTC15m
2026-06-03 EVAL20 - Jun 3, 21:15 UTCJun 3, 21:25 UTC10m
2026-06-03 EVAL20 - Jun 3, 19:40 UTCJun 3, 19:55 UTC15m
2026-06-03 EVAL20 - Jun 3, 17:30 UTCJun 3, 17:45 UTC15m
2026-06-03 EVAL20 - Jun 3, 15:35 UTCJun 3, 16:05 UTC30m
2026-05-29 EVAL01 - May 29, 16:50 UTCMay 29, 17:00 UTC10m
2026-05-29 EVAL01 - May 29, 15:25 UTCMay 29, 16:10 UTC45m
2026-05-20 EVAL22 HUA → HUA May 20, 14:20 UTCMay 20, 16:00 UTC1h 40m
2026-05-19 EVAL22 HUA → HUA May 19, 00:15 UTCMay 19, 01:35 UTC1h 20m
2026-05-18 EVAL20 - May 18, 15:05 UTCMay 18, 15:15 UTC10m
2026-05-18 EVAL20 - May 18, 13:55 UTCMay 18, 14:10 UTC15m
2026-05-14 EVAL78 - May 14, 15:05 UTCMay 14, 15:25 UTC20m
2026-05-14 EVAL78 - May 14, 14:01 UTCMay 14, 14:15 UTC15m
2026-05-11 EVAL04 - May 11, 16:35 UTCMay 11, 16:55 UTC20m
2026-05-11 EVAL04 - May 11, 15:15 UTCMay 11, 15:30 UTC15m
2026-05-04 EVAL04 - May 4, 16:50 UTCMay 4, 18:05 UTC1h 15m
2026-05-04 EVAL22 HUA → HUA May 4, 14:05 UTCMay 4, 15:35 UTC1h 30m
2026-05-01 EVAL33 - May 1, 20:15 UTCMay 1, 20:30 UTC15m
2026-05-01 EVAL33 - May 1, 19:05 UTCMay 1, 19:15 UTC10m
2026-05-01 EVAL20 - May 1, 15:15 UTCMay 1, 16:35 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 N6086Z page for operator, model, and routing details .

Mode-S A7E839 frequently asked

What is Mode-S code A7E839?
A7E839 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6086Z.
Where is Mode-S A7E839 registered?
Mode-S code A7E839 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 A7E839 broadcasting right now?
No active broadcast right now. Last signal was Jul 8, 15:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7E839, octal 51764071, decimal 11,003,961.
What flights does A7E839 operate?
Mode-S A7E839 has broadcast 11 distinct callsigns, including EVAL22, EVAL20, EVAL13, EVAL01, EVAL04.