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sensors Mode-S transponder

A642CD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N502QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, BANK OF UTAH TRUSTEE, BERLIN BARRY P, REISHER MARY S, CONSTRUCTION MANAGEMENT & BUILDERS INC, GOODWIN GREGORY A

Hex
A642CD
Octal
51441315
Decimal
10,896,077
Country
US
Tail
N502QS
Type
C68A
No current signal · last broadcast 6d ago
Flights observed
137
Distinct callsigns
2
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S A642CD.

Country allocation

The ICAO 24-bit address A642CD 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
EJA502 - 131 2026-07-07
N502QS - 6 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 N502QS - Jul 8, 13:20 UTCJul 8, 15:35 UTC2h 15m
2026-07-08 N502QS - Jul 8, 11:20 UTCJul 8, 12:00 UTC40m
2026-07-07 EJA502 - Jul 7, 22:55 UTCJul 8, 02:45 UTC3h 50m
2026-07-07 EJA502 DEN → TUS Jul 7, 17:55 UTCJul 7, 19:30 UTC1h 35m
2026-07-07 EJA502 - Jul 7, 16:15 UTCJul 7, 16:45 UTC30m
2026-07-02 EJA502 - Jul 2, 14:35 UTCJul 2, 18:30 UTC3h 55m
2026-06-30 EJA502 - Jun 30, 17:40 UTCJun 30, 18:30 UTC50m
2026-06-30 EJA502 - Jun 30, 16:00 UTCJun 30, 16:45 UTC45m
2026-06-30 EJA502 TEB → HPN Jun 30, 14:00 UTCJun 30, 14:15 UTC15m
2026-06-30 EJA502 - Jun 30, 11:15 UTCJun 30, 12:15 UTC1h 0m
2026-06-29 EJA502 - Jun 29, 20:00 UTCJun 29, 20:35 UTC35m
2026-06-29 EJA502 - Jun 29, 18:39 UTCJun 29, 19:20 UTC40m
2026-06-29 EJA502 TEB → HPN Jun 29, 13:24 UTCJun 29, 13:44 UTC20m
2026-06-26 EJA502 - Jun 26, 22:55 UTCJun 26, 23:49 UTC55m
2026-06-26 EJA502 - Jun 26, 21:04 UTCJun 26, 21:50 UTC45m
2026-06-26 EJA502 - Jun 26, 18:09 UTCJun 26, 18:54 UTC45m
2026-06-20 EJA502 - Jun 20, 17:39 UTCJun 20, 18:59 UTC1h 20m
2026-06-20 EJA502 - Jun 20, 14:29 UTCJun 20, 16:34 UTC2h 5m
2026-06-20 EJA502 - Jun 20, 13:04 UTCJun 20, 13:29 UTC25m
2026-06-19 EJA502 - Jun 19, 19:45 UTCJun 19, 20:49 UTC1h 5m
2026-06-19 EJA502 - Jun 19, 18:25 UTCJun 19, 18:54 UTC30m
2026-06-19 EJA502 - Jun 19, 13:50 UTCJun 19, 14:59 UTC1h 10m
2026-06-18 EJA502 - Jun 18, 22:05 UTCJun 18, 23:10 UTC1h 5m
2026-06-18 EJA502 - Jun 18, 20:10 UTCJun 18, 21:05 UTC55m
2026-06-18 EJA502 - Jun 18, 18:10 UTCJun 18, 18:55 UTC45m
2026-06-18 EJA502 - Jun 18, 14:10 UTCJun 18, 15:25 UTC1h 15m
2026-06-18 EJA502 - Jun 18, 12:30 UTCJun 18, 12:45 UTC15m
2026-06-17 EJA502 - Jun 17, 20:05 UTCJun 17, 20:20 UTC15m
2026-06-17 EJA502 - Jun 17, 18:00 UTCJun 17, 18:30 UTC30m
2026-06-17 EJA502 - Jun 17, 16:35 UTCJun 17, 17:10 UTC35m
2026-06-17 EJA502 - Jun 17, 13:30 UTCJun 17, 15:50 UTC2h 20m
2026-06-17 EJA502 - Jun 17, 11:35 UTCJun 17, 12:10 UTC35m
2026-06-16 EJA502 - Jun 16, 21:20 UTCJun 16, 22:25 UTC1h 5m
2026-06-16 EJA502 - Jun 16, 18:20 UTCJun 16, 20:35 UTC2h 16m
2026-06-16 EJA502 - Jun 16, 13:25 UTCJun 16, 15:24 UTC2h 0m
2026-06-16 EJA502 - Jun 16, 00:45 UTCJun 16, 01:04 UTC20m
2026-06-15 EJA502 - Jun 15, 20:25 UTCJun 15, 23:50 UTC3h 25m
2026-06-15 EJA502 - Jun 15, 17:59 UTCJun 15, 18:45 UTC45m
2026-06-15 EJA502 - Jun 15, 15:00 UTCJun 15, 17:04 UTC2h 5m
2026-06-15 EJA502 - Jun 15, 02:50 UTCJun 15, 03:55 UTC1h 5m
2026-06-14 EJA502 - Jun 14, 23:29 UTCJun 15, 01:55 UTC2h 25m
2026-06-14 EJA502 - Jun 14, 17:50 UTCJun 14, 19:25 UTC1h 35m
2026-06-14 EJA502 - Jun 14, 15:05 UTCJun 14, 16:00 UTC55m
2026-06-13 EJA502 - Jun 13, 22:50 UTCJun 13, 23:35 UTC45m
2026-06-13 EJA502 - Jun 13, 18:55 UTCJun 13, 20:45 UTC1h 50m
2026-06-13 EJA502 - Jun 13, 16:15 UTCJun 13, 17:40 UTC1h 25m
2026-06-13 EJA502 - Jun 13, 14:15 UTCJun 13, 14:45 UTC30m
2026-06-12 EJA502 - Jun 12, 23:15 UTCJun 13, 00:05 UTC50m
2026-06-12 EJA502 - Jun 12, 21:10 UTCJun 12, 21:30 UTC20m
2026-06-12 EJA502 - Jun 12, 18:25 UTCJun 12, 19:35 UTC1h 10m

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 N502QS page for operator, model, and routing details .

Mode-S A642CD frequently asked

What is Mode-S code A642CD?
A642CD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N502QS.
Where is Mode-S A642CD registered?
Mode-S code A642CD 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 A642CD broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A642CD, octal 51441315, decimal 10,896,077.
What flights does A642CD operate?
Mode-S A642CD has broadcast 2 distinct callsigns, including EJA502, N502QS.