Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6B593

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N531QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, BANK OF UTAH TRUSTEE, COLLEGE STREET INVESTORS LLC, JACOBS DEBORAH H, EF CAPITAL MANAGEMENT AVIATION LLC, FRYAR CIRCLE LLC

Hex
A6B593
Octal
51532623
Decimal
10,925,459
Country
US
Tail
N531QS
Type
C68A
No current signal · last broadcast 16h ago
Flights observed
224
Distinct callsigns
2
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A6B593.

Country allocation

The ICAO 24-bit address A6B593 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
EJA531 - 219 2026-07-13
N531QS - 5 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EJA531 - Jul 13, 23:50 UTCJul 14, 00:15 UTC25m
2026-07-13 EJA531 - Jul 13, 21:35 UTCJul 13, 23:25 UTC1h 50m
2026-07-13 EJA531 - Jul 13, 19:05 UTCJul 13, 20:45 UTC1h 40m
2026-07-13 EJA531 - Jul 13, 16:35 UTCJul 13, 17:35 UTC1h 0m
2026-07-11 EJA531 - Jul 11, 23:25 UTCJul 11, 23:45 UTC20m
2026-07-11 EJA531 - Jul 11, 20:25 UTCJul 11, 22:01 UTC1h 35m
2026-07-11 EJA531 - Jul 11, 18:00 UTCJul 11, 18:20 UTC20m
2026-07-11 EJA531 - Jul 11, 15:25 UTCJul 11, 17:00 UTC1h 35m
2026-07-11 EJA531 - Jul 11, 13:30 UTCJul 11, 13:55 UTC25m
2026-07-10 EJA531 - Jul 10, 18:05 UTCJul 10, 22:10 UTC4h 6m
2026-07-10 EJA531 - Jul 10, 16:10 UTCJul 10, 16:20 UTC10m
2026-07-10 EJA531 - Jul 10, 14:15 UTCJul 10, 15:20 UTC1h 5m
2026-07-10 EJA531 - Jul 10, 12:00 UTCJul 10, 13:05 UTC1h 5m
2026-06-22 EJA531 - Jun 22, 05:15 UTCJun 22, 06:19 UTC1h 5m
2026-06-22 EJA531 - Jun 22, 03:10 UTCJun 22, 04:30 UTC1h 20m
2026-06-21 EJA531 IAD → HPN Jun 21, 21:19 UTCJun 21, 22:20 UTC1h 0m
2026-06-21 EJA531 TEB → IAD Jun 21, 19:24 UTCJun 21, 20:09 UTC45m
2026-06-21 EJA531 - Jun 21, 14:50 UTCJun 21, 15:25 UTC35m
2026-06-21 EJA531 - Jun 21, 12:35 UTCJun 21, 12:49 UTC15m
2026-06-20 EJA531 - Jun 20, 23:04 UTCJun 20, 23:59 UTC55m
2026-06-20 EJA531 - Jun 20, 17:49 UTCJun 20, 20:05 UTC2h 15m
2026-06-20 EJA531 - Jun 20, 16:00 UTCJun 20, 16:34 UTC35m
2026-06-20 EJA531 - Jun 20, 14:19 UTCJun 20, 14:59 UTC40m
2026-06-19 EJA531 - Jun 19, 21:44 UTCJun 19, 22:55 UTC1h 10m
2026-06-19 EJA531 - Jun 19, 19:19 UTCJun 19, 20:40 UTC1h 20m
2026-06-19 EJA531 - Jun 19, 16:14 UTCJun 19, 17:29 UTC1h 15m
2026-06-18 EJA531 - Jun 18, 15:35 UTCJun 18, 16:50 UTC1h 15m
2026-06-17 EJA531 - Jun 17, 19:40 UTCJun 17, 23:55 UTC4h 15m
2026-06-17 EJA531 - Jun 17, 17:10 UTCJun 17, 17:25 UTC15m
2026-06-17 EJA531 - Jun 17, 15:00 UTCJun 17, 16:30 UTC1h 30m
2026-06-17 EJA531 - Jun 17, 13:25 UTCJun 17, 13:45 UTC20m
2026-06-17 EJA531 - Jun 17, 00:20 UTCJun 17, 01:25 UTC1h 5m
2026-06-16 EJA531 - Jun 16, 21:15 UTCJun 16, 23:15 UTC2h 0m
2026-06-16 EJA531 - Jun 16, 17:40 UTCJun 16, 19:35 UTC1h 55m
2026-06-16 EJA531 - Jun 16, 13:00 UTCJun 16, 13:44 UTC45m
2026-06-15 EJA531 - Jun 15, 23:19 UTCJun 16, 00:55 UTC1h 35m
2026-06-15 EJA531 - Jun 15, 00:24 UTCJun 15, 00:40 UTC15m
2026-06-14 EJA531 - Jun 14, 20:25 UTCJun 14, 23:25 UTC3h 0m
2026-06-14 EJA531 - Jun 14, 16:25 UTCJun 14, 19:30 UTC3h 5m
2026-06-13 EJA531 - Jun 13, 18:55 UTCJun 13, 20:00 UTC1h 5m
2026-06-13 EJA531 - Jun 13, 13:40 UTCJun 13, 13:55 UTC15m
2026-06-12 EJA531 GRB → APA Jun 12, 20:45 UTCJun 12, 23:40 UTC2h 55m
2026-06-12 EJA531 AUS → GRB Jun 12, 17:10 UTCJun 12, 19:40 UTC2h 30m
2026-06-12 EJA531 - Jun 12, 15:15 UTCJun 12, 15:50 UTC35m
2026-06-11 EJA531 SNA → JAC Jun 11, 22:20 UTCJun 11, 23:40 UTC1h 20m
2026-06-11 EJA531 SNA → JAC Jun 11, 19:15 UTCJun 11, 19:55 UTC40m
2026-06-11 EJA531 SNA → JAC Jun 11, 16:50 UTCJun 11, 17:40 UTC50m
2026-06-11 EJA531 SNA → JAC Jun 11, 14:20 UTCJun 11, 15:00 UTC40m
2026-06-11 EJA531 SNA → JAC Jun 11, 13:00 UTCJun 11, 13:45 UTC45m
2026-06-10 EJA531 SNA → JAC Jun 10, 23:15 UTCJun 10, 23:35 UTC20m

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 N531QS page for operator, model, and routing details .

Mode-S A6B593 frequently asked

What is Mode-S code A6B593?
A6B593 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N531QS.
Where is Mode-S A6B593 registered?
Mode-S code A6B593 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 A6B593 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6B593, octal 51532623, decimal 10,925,459.
What flights does A6B593 operate?
Mode-S A6B593 has broadcast 2 distinct callsigns, including EJA531, N531QS.