Apparatus

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sensors Mode-S transponder

A8592C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N637QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, CCT GROUP LLC, U S BANK NA, YLLEK AIR LLC

Hex
A8592C
Octal
52054454
Decimal
11,032,876
Country
US
Tail
N637QS
Type
C68A
No current signal · last broadcast 15h ago
Flights observed
215
Distinct callsigns
2
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A8592C.

Country allocation

The ICAO 24-bit address A8592C 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 2 distinct

Callsign Airline Flights Last seen
EJA637 - 203 2026-07-13
N637QS - 12 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EJA637 - Jul 13, 14:40 UTCJul 13, 15:35 UTC55m
2026-07-13 EJA637 LAS → SLC Jul 13, 12:45 UTCJul 13, 13:40 UTC55m
2026-07-10 EJA637 - Jul 10, 21:00 UTCJul 10, 23:20 UTC2h 20m
2026-07-10 EJA637 - Jul 10, 20:00 UTCJul 10, 20:20 UTC20m
2026-07-10 EJA637 - Jul 10, 15:35 UTCJul 10, 16:10 UTC35m
2026-07-09 EJA637 - Jul 9, 16:55 UTCJul 9, 17:15 UTC20m
2026-07-09 EJA637 - Jul 9, 15:05 UTCJul 9, 15:40 UTC35m
2026-07-08 EJA637 - Jul 8, 21:35 UTCJul 8, 22:40 UTC1h 5m
2026-07-08 EJA637 - Jul 8, 16:15 UTCJul 8, 18:45 UTC2h 30m
2026-07-08 EJA637 - Jul 8, 12:50 UTCJul 8, 14:30 UTC1h 40m
2026-07-08 EJA637 RKD → DAL Jul 8, 05:00 UTCJul 8, 05:40 UTC40m
2026-07-08 EJA637 RKD → DAL Jul 8, 03:05 UTCJul 8, 03:45 UTC40m
2026-07-07 EJA637 RKD → DAL Jul 7, 21:55 UTCJul 7, 22:50 UTC55m
2026-07-07 EJA637 RKD → DAL Jul 7, 20:15 UTCJul 7, 21:10 UTC55m
2026-07-07 EJA637 RKD → DAL Jul 7, 18:00 UTCJul 7, 18:35 UTC35m
2026-07-07 EJA637 RKD → DAL Jul 7, 14:30 UTCJul 7, 16:05 UTC1h 35m
2026-07-05 EJA637 RKD → DAL Jul 5, 23:15 UTCJul 5, 23:55 UTC40m
2026-07-05 EJA637 RKD → DAL Jul 5, 20:25 UTCJul 5, 22:20 UTC1h 55m
2026-07-05 EJA637 RKD → DAL Jul 5, 17:00 UTCJul 5, 19:20 UTC2h 20m
2026-07-02 EJA637 RKD → DAL Jul 2, 19:40 UTCJul 2, 20:40 UTC1h 0m
2026-07-02 EJA637 RKD → DAL Jul 2, 15:55 UTCJul 2, 17:25 UTC1h 30m
2026-06-29 EJA637 RKD → DAL Jun 29, 19:15 UTCJun 29, 20:49 UTC1h 35m
2026-06-29 EJA637 RKD → DAL Jun 29, 16:15 UTCJun 29, 17:45 UTC1h 30m
2026-06-29 EJA637 RKD → DAL Jun 29, 13:00 UTCJun 29, 14:29 UTC1h 30m
2026-06-28 EJA637 RKD → DAL Jun 28, 23:25 UTCJun 28, 23:34 UTC10m
2026-06-28 EJA637 RKD → DAL Jun 28, 17:19 UTCJun 28, 18:40 UTC1h 20m
2026-06-28 EJA637 RKD → DAL Jun 28, 16:39 UTCJun 28, 16:45 UTC5m
2026-06-28 EJA637 RKD → DAL Jun 28, 13:14 UTCJun 28, 13:40 UTC25m
2026-06-27 EJA637 RKD → DAL Jun 27, 20:14 UTCJun 27, 20:24 UTC10m
2026-06-27 EJA637 RKD → DAL Jun 27, 18:09 UTCJun 27, 19:34 UTC1h 25m
2026-06-27 EJA637 RKD → DAL Jun 27, 15:39 UTCJun 27, 16:30 UTC50m
2026-06-27 EJA637 RKD → DAL Jun 27, 13:49 UTCJun 27, 14:39 UTC50m
2026-06-27 EJA637 RKD → DAL Jun 27, 11:59 UTCJun 27, 12:55 UTC55m
2026-06-26 EJA637 RKD → DAL Jun 26, 18:15 UTCJun 26, 19:45 UTC1h 30m
2026-06-26 EJA637 RKD → DAL Jun 26, 15:54 UTCJun 26, 16:35 UTC40m
2026-06-26 EJA637 RKD → DAL Jun 26, 00:50 UTCJun 26, 02:20 UTC1h 30m
2026-06-25 EJA637 RKD → DAL Jun 25, 20:54 UTCJun 25, 22:29 UTC1h 35m
2026-06-25 EJA637 RKD → DAL Jun 25, 15:24 UTCJun 25, 18:00 UTC2h 35m
2026-06-24 N637QS - Jun 24, 21:24 UTCJun 24, 21:50 UTC25m
2026-06-24 N637QS - Jun 24, 14:00 UTCJun 24, 20:20 UTC6h 20m
2026-06-23 N637QS - Jun 23, 21:20 UTCJun 23, 22:49 UTC1h 30m
2026-06-23 EJA637 RKD → DAL Jun 23, 15:04 UTCJun 23, 17:39 UTC2h 35m
2026-06-23 EJA637 RKD → DAL Jun 23, 13:19 UTCJun 23, 13:39 UTC20m
2026-06-22 EJA637 RKD → DAL Jun 22, 21:30 UTCJun 22, 21:54 UTC25m
2026-06-22 EJA637 RKD → DAL Jun 22, 17:55 UTCJun 22, 20:19 UTC2h 25m
2026-06-22 EJA637 RKD → DAL Jun 22, 15:59 UTCJun 22, 16:34 UTC35m
2026-06-22 EJA637 RKD → DAL Jun 22, 13:19 UTCJun 22, 13:39 UTC20m
2026-06-22 EJA637 RKD → DAL Jun 22, 12:10 UTCJun 22, 12:30 UTC20m
2026-06-21 EJA637 RKD → DAL Jun 21, 21:24 UTCJun 21, 22:10 UTC45m
2026-06-21 EJA637 RKD → DAL Jun 21, 16:14 UTCJun 21, 16:59 UTC45m

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 N637QS page for operator, model, and routing details .

Mode-S A8592C frequently asked

What is Mode-S code A8592C?
A8592C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N637QS.
Where is Mode-S A8592C registered?
Mode-S code A8592C 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 A8592C broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8592C, octal 52054454, decimal 11,032,876.
What flights does A8592C operate?
Mode-S A8592C has broadcast 2 distinct callsigns, including EJA637, N637QS.