Apparatus

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sensors Mode-S transponder

A7538F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N571QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, SV AVIATION II LLC, LATITUDE INVESTMENT PARTNERS LLC, JAGGERS INVESTMENTS II LLLP, KORNITZER CAPITAL MANAGEMENT INC, L3HARRIS TECHNOLOGIES INC

Hex
A7538F
Octal
51651617
Decimal
10,965,903
Country
US
Tail
N571QS
Type
C68A
No current signal · last broadcast 4h ago
Flights observed
125
Distinct callsigns
2
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A7538F.

Country allocation

The ICAO 24-bit address A7538F 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
EJA571 NetJets 122 2026-05-29
N571QS - 3 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA571 SFO → TVC May 29, 20:35 UTCMay 29, 20:50 UTC15m
2026-05-29 EJA571 SFO → TVC May 29, 17:40 UTCMay 29, 19:50 UTC2h 10m
2026-05-29 EJA571 SFO → TVC May 29, 14:00 UTCMay 29, 16:35 UTC2h 35m
2026-05-28 EJA571 SFO → TVC May 28, 22:30 UTCMay 28, 23:40 UTC1h 10m
2026-05-28 EJA571 SFO → TVC May 28, 20:20 UTCMay 28, 21:45 UTC1h 25m
2026-05-26 EJA571 SFO → TVC May 26, 15:14 UTCMay 26, 16:24 UTC1h 10m
2026-05-26 EJA571 SFO → TVC May 26, 12:50 UTCMay 26, 13:45 UTC55m
2026-05-24 EJA571 SFO → TVC May 24, 21:15 UTCMay 24, 21:30 UTC15m
2026-05-24 EJA571 SFO → TVC May 24, 15:40 UTCMay 24, 17:05 UTC1h 25m
2026-05-24 EJA571 SFO → TVC May 24, 13:50 UTCMay 24, 14:05 UTC15m
2026-05-23 EJA571 SFO → TVC May 23, 22:40 UTCMay 23, 23:20 UTC40m
2026-05-23 EJA571 SFO → TVC May 23, 18:20 UTCMay 23, 21:50 UTC3h 30m
2026-05-23 EJA571 SFO → TVC May 23, 17:00 UTCMay 23, 17:40 UTC40m
2026-05-22 EJA571 SFO → TVC May 22, 23:40 UTCMay 23, 00:30 UTC50m
2026-05-22 EJA571 SFO → TVC May 22, 21:35 UTCMay 22, 22:40 UTC1h 5m
2026-05-22 EJA571 SFO → TVC May 22, 17:55 UTCMay 22, 19:45 UTC1h 50m
2026-05-22 EJA571 SFO → TVC May 22, 15:00 UTCMay 22, 17:00 UTC2h 0m
2026-05-22 EJA571 SFO → TVC May 22, 00:05 UTCMay 22, 00:30 UTC25m
2026-05-21 EJA571 SFO → TVC May 21, 21:45 UTCMay 21, 23:40 UTC1h 55m
2026-05-21 EJA571 SFO → TVC May 21, 18:00 UTCMay 21, 19:40 UTC1h 40m
2026-05-21 EJA571 SFO → TVC May 21, 15:15 UTCMay 21, 15:55 UTC40m
2026-05-21 EJA571 SFO → TVC May 21, 00:15 UTCMay 21, 01:55 UTC1h 40m
2026-05-20 EJA571 SFO → TVC May 20, 22:05 UTCMay 20, 23:25 UTC1h 20m
2026-05-20 EJA571 SFO → TVC May 20, 20:20 UTCMay 20, 21:30 UTC1h 10m
2026-05-20 EJA571 SFO → TVC May 20, 15:40 UTCMay 20, 17:45 UTC2h 5m
2026-05-19 EJA571 SFO → TVC May 19, 20:35 UTCMay 19, 20:50 UTC15m
2026-05-15 EJA571 SFO → TVC May 15, 15:15 UTCMay 15, 17:30 UTC2h 15m
2026-05-14 EJA571 SFO → TVC May 14, 22:45 UTCMay 15, 01:50 UTC3h 5m
2026-05-14 EJA571 SFO → TVC May 14, 20:20 UTCMay 14, 21:20 UTC1h 0m
2026-05-14 EJA571 SFO → TVC May 14, 18:05 UTCMay 14, 19:05 UTC1h 0m
2026-05-14 EJA571 SFO → TVC May 14, 15:20 UTCMay 14, 16:05 UTC45m
2026-05-14 EJA571 SFO → TVC May 14, 02:15 UTCMay 14, 03:00 UTC45m
2026-05-14 EJA571 SFO → TVC May 14, 00:15 UTCMay 14, 01:15 UTC1h 0m
2026-05-13 EJA571 SFO → TVC May 13, 21:55 UTCMay 13, 23:05 UTC1h 10m
2026-05-13 EJA571 SFO → TVC May 13, 17:05 UTCMay 13, 20:15 UTC3h 10m
2026-05-13 EJA571 SFO → TVC May 13, 00:45 UTCMay 13, 02:05 UTC1h 20m
2026-05-12 EJA571 SFO → TVC May 12, 21:40 UTCMay 12, 23:55 UTC2h 15m
2026-05-12 EJA571 SFO → TVC May 12, 19:00 UTCMay 12, 19:25 UTC25m
2026-05-12 EJA571 SFO → TVC May 12, 16:30 UTCMay 12, 17:05 UTC35m
2026-05-09 EJA571 SFO → TVC May 9, 10:25 UTCMay 9, 11:05 UTC40m
2026-05-08 EJA571 SFO → TVC May 8, 18:15 UTCMay 8, 19:25 UTC1h 10m
2026-05-08 EJA571 SFO → TVC May 8, 16:55 UTCMay 8, 17:05 UTC10m
2026-05-08 EJA571 SFO → TVC May 8, 15:05 UTCMay 8, 16:25 UTC1h 20m
2026-05-08 EJA571 SFO → TVC May 8, 01:00 UTCMay 8, 01:45 UTC45m
2026-05-07 EJA571 SFO → TVC May 7, 22:20 UTCMay 8, 00:14 UTC1h 55m
2026-05-07 EJA571 SFO → TVC May 7, 21:05 UTCMay 7, 21:40 UTC35m
2026-05-07 EJA571 SFO → TVC May 7, 18:20 UTCMay 7, 19:30 UTC1h 10m
2026-05-07 EJA571 SFO → TVC May 7, 15:00 UTCMay 7, 16:10 UTC1h 10m
2026-05-06 EJA571 SFO → TVC May 6, 23:05 UTCMay 6, 23:20 UTC15m
2026-05-06 EJA571 SFO → TVC May 6, 19:55 UTCMay 6, 20:45 UTC50m

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 N571QS page for operator, model, and routing details .

Mode-S A7538F frequently asked

What is Mode-S code A7538F?
A7538F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N571QS.
Where is Mode-S A7538F registered?
Mode-S code A7538F 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 A7538F broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7538F, octal 51651617, decimal 10,965,903.
What flights does A7538F operate?
Mode-S A7538F has broadcast 2 distinct callsigns, including EJA571, N571QS.