Apparatus

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sensors Mode-S transponder

A9523E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N70AJ

Hex
A9523E
Octal
52251076
Decimal
11,096,638
Country
US
Tail
N70AJ
Type
BE20
No current signal · last broadcast 1d ago
Flights observed
48
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A9523E.

Country allocation

The ICAO 24-bit address A9523E 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
N70AJ - 48 2026-07-17

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-07-17 N70AJ - Jul 17, 18:34 UTCJul 17, 18:55 UTC20m
2026-07-13 N70AJ - Jul 13, 20:25 UTCJul 13, 20:45 UTC20m
2026-07-10 N70AJ - Jul 10, 22:35 UTCJul 10, 23:00 UTC25m
2026-07-10 N70AJ - Jul 10, 22:10 UTCJul 10, 22:30 UTC20m
2026-07-09 N70AJ - Jul 9, 21:20 UTCJul 9, 21:40 UTC20m
2026-06-30 N70AJ - Jun 30, 19:30 UTCJun 30, 19:45 UTC15m
2026-06-30 N70AJ - Jun 30, 18:00 UTCJun 30, 18:45 UTC45m
2026-06-27 N70AJ - Jun 27, 17:44 UTCJun 27, 18:04 UTC20m
2026-06-27 N70AJ - Jun 27, 16:10 UTCJun 27, 16:24 UTC15m
2026-06-24 N70AJ - Jun 24, 19:15 UTCJun 24, 19:24 UTC10m
2026-06-24 N70AJ - Jun 24, 17:55 UTCJun 24, 18:05 UTC10m
2026-06-23 N70AJ - Jun 23, 21:59 UTCJun 23, 23:10 UTC1h 10m
2026-06-23 N70AJ - Jun 23, 15:40 UTCJun 23, 16:44 UTC1h 5m
2026-06-23 N70AJ - Jun 23, 00:09 UTCJun 23, 00:30 UTC20m
2026-06-22 N70AJ - Jun 22, 23:05 UTCJun 22, 23:14 UTC10m
2026-06-17 N70AJ - Jun 17, 20:55 UTCJun 17, 23:35 UTC2h 40m
2026-06-15 N70AJ - Jun 15, 20:34 UTCJun 15, 22:49 UTC2h 15m
2026-06-15 N70AJ - Jun 15, 19:25 UTCJun 15, 19:55 UTC30m
2026-06-14 N70AJ - Jun 14, 22:15 UTCJun 14, 23:44 UTC1h 30m
2026-06-14 N70AJ - Jun 14, 18:45 UTCJun 14, 20:05 UTC1h 20m
2026-06-10 N70AJ - Jun 10, 22:40 UTCJun 10, 23:50 UTC1h 10m
2026-06-10 N70AJ - Jun 10, 19:20 UTCJun 10, 20:10 UTC50m
2026-06-02 N70AJ - Jun 2, 16:05 UTCJun 2, 17:25 UTC1h 20m
2026-06-01 N70AJ - Jun 1, 16:35 UTCJun 1, 18:00 UTC1h 25m
2026-05-29 N70AJ - May 29, 22:45 UTCMay 29, 23:15 UTC30m
2026-05-29 N70AJ - May 29, 19:25 UTCMay 29, 20:10 UTC45m
2026-05-29 N70AJ - May 29, 17:35 UTCMay 29, 18:20 UTC45m
2026-05-24 N70AJ - May 24, 18:35 UTCMay 24, 20:35 UTC2h 0m
2026-05-16 N70AJ - May 16, 22:40 UTCMay 17, 01:25 UTC2h 45m
2026-05-16 N70AJ - May 16, 19:10 UTCMay 16, 21:20 UTC2h 9m
2026-05-16 N70AJ - May 16, 17:40 UTCMay 16, 18:30 UTC50m
2026-05-13 N70AJ - May 13, 22:15 UTCMay 13, 23:20 UTC1h 5m
2026-05-13 N70AJ - May 13, 20:20 UTCMay 13, 21:05 UTC45m
2026-05-13 N70AJ - May 13, 16:50 UTCMay 13, 17:15 UTC25m
2026-05-13 N70AJ - May 13, 14:00 UTCMay 13, 16:15 UTC2h 15m
2026-05-12 N70AJ - May 12, 15:30 UTCMay 12, 17:35 UTC2h 5m
2026-05-12 N70AJ - May 12, 12:10 UTCMay 12, 13:00 UTC50m
2026-05-11 N70AJ - May 11, 21:20 UTCMay 11, 22:35 UTC1h 14m
2026-05-11 N70AJ - May 11, 19:25 UTCMay 11, 19:40 UTC15m
2026-05-11 N70AJ - May 11, 18:30 UTCMay 11, 18:45 UTC15m
2026-05-11 N70AJ - May 11, 16:35 UTCMay 11, 17:45 UTC1h 10m
2026-05-10 N70AJ - May 10, 17:34 UTCMay 10, 17:49 UTC15m
2026-05-10 N70AJ - May 10, 12:59 UTCMay 10, 13:10 UTC10m
2026-05-09 N70AJ - May 9, 18:35 UTCMay 9, 20:15 UTC1h 40m
2026-05-09 N70AJ - May 9, 14:50 UTCMay 9, 15:55 UTC1h 5m
2026-05-05 N70AJ - May 5, 20:40 UTCMay 5, 22:50 UTC2h 10m
2026-05-05 N70AJ - May 5, 18:30 UTCMay 5, 19:50 UTC1h 20m
2026-05-01 N70AJ - May 1, 18:55 UTCMay 1, 19:10 UTC15m

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 N70AJ page for operator, model, and routing details .

Mode-S A9523E frequently asked

What is Mode-S code A9523E?
A9523E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N70AJ.
Where is Mode-S A9523E registered?
Mode-S code A9523E 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 A9523E broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9523E, octal 52251076, decimal 11,096,638.
What flights does A9523E operate?
Mode-S A9523E has broadcast 1 distinct callsign, including N70AJ.