Apparatus

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sensors Mode-S transponder

AB73CA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N837QS · CESSNA 700 Citation Longitude · operated by NETJETS SALES INC, BEAR'S LAIR LLC, GROSSMAN BLAKE, MCELHENY CRAIG, ROMAN EMMANUEL, GRAY JOSEPH KELLY AND GRAY RONDA

Hex
AB73CA
Octal
52671712
Decimal
11,236,298
Country
US
Tail
N837QS
Type
C700
No current signal · last broadcast 3h ago
Flights observed
80
Distinct callsigns
2
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S AB73CA.

Country allocation

The ICAO 24-bit address AB73CA 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
EJA837 NetJets 71 2026-05-29
N837QS - 9 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA837 BED → PSP May 29, 21:05 UTCMay 29, 22:15 UTC1h 10m
2026-05-29 EJA837 BED → PSP May 29, 19:45 UTCMay 29, 20:30 UTC45m
2026-05-29 EJA837 BED → PSP May 29, 17:40 UTCMay 29, 18:00 UTC20m
2026-05-29 EJA837 BED → PSP May 29, 15:55 UTCMay 29, 16:45 UTC50m
2026-05-29 EJA837 BED → PSP May 29, 13:05 UTCMay 29, 13:50 UTC45m
2026-05-28 EJA837 BED → PSP May 28, 19:50 UTCMay 28, 21:00 UTC1h 10m
2026-05-28 EJA837 BED → PSP May 28, 18:25 UTCMay 28, 19:05 UTC40m
2026-05-28 EJA837 BED → PSP May 28, 15:00 UTCMay 28, 16:35 UTC1h 35m
2026-05-28 EJA837 BED → PSP May 28, 12:15 UTCMay 28, 13:40 UTC1h 25m
2026-05-27 EJA837 BED → PSP May 27, 20:35 UTCMay 27, 21:40 UTC1h 5m
2026-05-27 EJA837 BED → PSP May 27, 18:05 UTCMay 27, 19:45 UTC1h 40m
2026-05-27 EJA837 BED → PSP May 27, 16:30 UTCMay 27, 17:25 UTC55m
2026-05-27 EJA837 BED → PSP May 27, 11:35 UTCMay 27, 12:25 UTC50m
2026-05-26 EJA837 BED → PSP May 26, 17:59 UTCMay 26, 19:55 UTC1h 55m
2026-05-26 EJA837 BED → PSP May 26, 13:04 UTCMay 26, 14:05 UTC1h 0m
2026-05-26 EJA837 BED → PSP May 26, 10:39 UTCMay 26, 10:50 UTC10m
2026-05-25 EJA837 BED → PSP May 25, 21:54 UTCMay 25, 23:04 UTC1h 10m
2026-05-25 EJA837 BED → PSP May 25, 19:44 UTCMay 25, 21:04 UTC1h 20m
2026-05-25 EJA837 BED → PSP May 25, 18:10 UTCMay 25, 19:00 UTC50m
2026-05-25 EJA837 BED → PSP May 25, 15:30 UTCMay 25, 17:10 UTC1h 40m
2026-05-25 EJA837 BED → PSP May 25, 12:10 UTCMay 25, 13:25 UTC1h 15m
2026-05-21 EJA837 BED → PSP May 21, 19:40 UTCMay 21, 20:40 UTC1h 0m
2026-05-21 EJA837 BED → PSP May 21, 17:05 UTCMay 21, 18:35 UTC1h 30m
2026-05-11 EJA837 BED → PSP May 11, 00:05 UTCMay 11, 00:34 UTC30m
2026-05-10 EJA837 BED → PSP May 10, 19:54 UTCMay 10, 23:29 UTC3h 35m
2026-05-10 EJA837 BED → PSP May 10, 17:34 UTCMay 10, 18:20 UTC45m
2026-05-09 EJA837 BED → PSP May 9, 18:10 UTCMay 9, 22:20 UTC4h 10m
2026-05-09 EJA837 BED → PSP May 9, 15:25 UTCMay 9, 15:40 UTC15m
2026-05-08 EJA837 BED → PSP May 8, 22:25 UTCMay 8, 23:05 UTC40m
2026-05-08 EJA837 BED → PSP May 8, 20:25 UTCMay 8, 21:45 UTC1h 20m
2026-05-08 EJA837 BED → PSP May 8, 19:55 UTCMay 8, 20:20 UTC25m
2026-05-08 EJA837 BED → PSP May 8, 16:40 UTCMay 8, 17:35 UTC55m
2026-05-08 EJA837 BED → PSP May 8, 13:30 UTCMay 8, 15:10 UTC1h 40m
2026-05-08 EJA837 BED → PSP May 8, 11:25 UTCMay 8, 12:14 UTC50m
2026-05-07 EJA837 BED → PSP May 7, 19:15 UTCMay 7, 21:20 UTC2h 5m
2026-05-07 EJA837 BED → PSP May 7, 16:15 UTCMay 7, 16:25 UTC10m
2026-05-07 EJA837 BED → PSP May 7, 12:20 UTCMay 7, 15:20 UTC3h 0m
2026-05-06 EJA837 BED → PSP May 6, 23:25 UTCMay 6, 23:50 UTC25m
2026-05-06 EJA837 BED → PSP May 6, 22:20 UTCMay 6, 22:55 UTC35m
2026-05-06 EJA837 BED → PSP May 6, 19:25 UTCMay 6, 20:00 UTC35m
2026-05-06 N837QS - May 6, 18:00 UTCMay 6, 18:45 UTC45m
2026-05-05 N837QS - May 5, 15:20 UTCMay 5, 16:30 UTC1h 10m
2026-05-05 EJA837 BED → PSP May 5, 12:50 UTCMay 5, 13:50 UTC1h 0m
2026-05-04 EJA837 BED → PSP May 4, 18:45 UTCMay 4, 19:55 UTC1h 10m
2026-05-04 EJA837 BED → PSP May 4, 15:45 UTCMay 4, 17:40 UTC1h 55m
2026-05-04 EJA837 BED → PSP May 4, 14:05 UTCMay 4, 15:05 UTC1h 0m
2026-05-03 EJA837 BED → PSP May 3, 19:50 UTCMay 3, 21:24 UTC1h 35m
2026-05-03 EJA837 BED → PSP May 3, 17:54 UTCMay 3, 18:45 UTC50m
2026-05-03 EJA837 BED → PSP May 3, 14:55 UTCMay 3, 16:55 UTC2h 0m
2026-05-02 EJA837 BED → PSP May 2, 21:35 UTCMay 2, 22:35 UTC1h 0m

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 N837QS page for operator, model, and routing details .

Mode-S AB73CA frequently asked

What is Mode-S code AB73CA?
AB73CA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N837QS.
Where is Mode-S AB73CA registered?
Mode-S code AB73CA 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 AB73CA broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB73CA, octal 52671712, decimal 11,236,298.
What flights does AB73CA operate?
Mode-S AB73CA has broadcast 2 distinct callsigns, including EJA837, N837QS.