Apparatus

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sensors Mode-S transponder

A3A138

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N333CT · CESSNA 172 Skyhawk · operated by JRM WINGS LLC

Hex
A3A138
Octal
50720470
Decimal
10,723,640
Country
US
Tail
N333CT
Type
C172
No current signal · last broadcast Jul 24, 16:50 UTC
Flights observed
159
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 16:50 UTC

Last known position

Most recent position reported by Mode-S A3A138.

Country allocation

The ICAO 24-bit address A3A138 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 1 distinct

Callsign Airline Flights Last seen
N333CT - 159 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N333CT - Jul 24, 16:00 UTCJul 24, 16:50 UTC50m
2026-07-24 N333CT - Jul 24, 00:20 UTCJul 24, 01:35 UTC1h 15m
2026-07-23 N333CT - Jul 23, 20:40 UTCJul 23, 20:55 UTC15m
2026-07-23 N333CT - Jul 23, 18:30 UTCJul 23, 19:00 UTC30m
2026-07-23 N333CT OGD → OGD Jul 23, 15:40 UTCJul 23, 17:10 UTC1h 30m
2026-07-23 N333CT OGD → OGD Jul 23, 13:45 UTCJul 23, 14:40 UTC55m
2026-07-22 N333CT - Jul 22, 20:45 UTCJul 22, 21:30 UTC45m
2026-07-22 N333CT - Jul 22, 19:00 UTCJul 22, 19:40 UTC40m
2026-07-22 N333CT OGD → OGD Jul 22, 13:45 UTCJul 22, 14:45 UTC1h 0m
2026-07-21 N333CT - Jul 21, 00:00 UTCJul 21, 01:15 UTC1h 15m
2026-07-20 N333CT - Jul 20, 15:35 UTCJul 20, 17:00 UTC1h 25m
2026-07-17 N333CT OGD → OGD Jul 17, 17:55 UTCJul 17, 18:40 UTC45m
2026-07-10 N333CT OGD → OGD Jul 10, 15:50 UTCJul 10, 17:05 UTC1h 15m
2026-07-10 N333CT - Jul 10, 00:30 UTCJul 10, 01:50 UTC1h 20m
2026-07-08 N333CT - Jul 8, 21:50 UTCJul 8, 22:40 UTC50m
2026-07-08 N333CT - Jul 8, 16:45 UTCJul 8, 17:50 UTC1h 5m
2026-07-08 N333CT OGD → BMC Jul 8, 15:45 UTCJul 8, 16:00 UTC15m
2026-07-07 N333CT - Jul 7, 16:05 UTCJul 7, 18:45 UTC2h 40m
2026-07-07 N333CT - Jul 7, 14:00 UTCJul 7, 14:50 UTC50m
2026-06-30 N333CT - Jun 30, 14:45 UTCJun 30, 15:45 UTC1h 0m
2026-06-30 N333CT - Jun 30, 00:35 UTCJun 30, 02:55 UTC2h 21m
2026-06-29 N333CT - Jun 29, 23:19 UTCJun 29, 23:54 UTC35m
2026-06-29 N333CT - Jun 29, 21:54 UTCJun 29, 22:35 UTC40m
2026-06-29 N333CT - Jun 29, 19:39 UTCJun 29, 20:40 UTC1h 0m
2026-06-29 N333CT - Jun 29, 17:45 UTCJun 29, 18:44 UTC1h 0m
2026-06-29 N333CT OGD → OGD Jun 29, 13:30 UTCJun 29, 14:09 UTC40m
2026-06-28 N333CT - Jun 28, 16:25 UTCJun 28, 17:25 UTC1h 0m
2026-06-25 N333CT - Jun 25, 18:50 UTCJun 25, 20:09 UTC1h 20m
2026-06-25 N333CT - Jun 25, 17:30 UTCJun 25, 17:54 UTC25m
2026-06-25 N333CT - Jun 25, 15:04 UTCJun 25, 16:45 UTC1h 40m
2026-06-24 N333CT OGD → OGD Jun 24, 23:45 UTCJun 24, 23:54 UTC10m
2026-06-24 N333CT - Jun 24, 19:39 UTCJun 24, 20:35 UTC55m
2026-06-24 N333CT OGD → OGD Jun 24, 17:29 UTCJun 24, 18:29 UTC1h 0m
2026-06-20 N333CT OGD → OGD Jun 20, 05:04 UTCJun 20, 05:29 UTC25m
2026-06-19 N333CT - Jun 19, 20:24 UTCJun 19, 20:55 UTC30m
2026-06-19 N333CT - Jun 19, 18:44 UTCJun 19, 19:19 UTC35m
2026-06-19 N333CT - Jun 19, 17:24 UTCJun 19, 17:59 UTC35m
2026-06-19 N333CT - Jun 19, 15:59 UTCJun 19, 16:39 UTC40m
2026-06-19 N333CT OGD → OGD Jun 19, 13:50 UTCJun 19, 14:15 UTC25m
2026-06-19 N333CT - Jun 19, 01:45 UTCJun 19, 02:35 UTC50m
2026-06-18 N333CT - Jun 18, 23:40 UTCJun 19, 00:29 UTC49m
2026-06-18 N333CT - Jun 18, 21:40 UTCJun 18, 22:40 UTC1h 0m
2026-06-18 N333CT - Jun 18, 17:30 UTCJun 18, 18:50 UTC1h 20m
2026-06-17 N333CT - Jun 17, 17:05 UTCJun 17, 17:50 UTC45m
2026-06-17 N333CT OGD → OGD Jun 17, 15:35 UTCJun 17, 15:55 UTC20m
2026-06-16 N333CT - Jun 16, 23:45 UTCJun 17, 00:35 UTC50m
2026-06-16 N333CT - Jun 16, 15:40 UTCJun 16, 16:25 UTC45m
2026-06-16 N333CT - Jun 16, 00:20 UTCJun 16, 01:30 UTC1h 10m
2026-06-15 N333CT OGD → OGD Jun 15, 21:50 UTCJun 15, 22:10 UTC20m
2026-06-15 N333CT - Jun 15, 14:05 UTCJun 15, 14:55 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 N333CT page for operator, model, and routing details .

Mode-S A3A138 frequently asked

What is Mode-S code A3A138?
A3A138 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N333CT.
Where is Mode-S A3A138 registered?
Mode-S code A3A138 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 A3A138 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 16:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3A138, octal 50720470, decimal 10,723,640.
What flights does A3A138 operate?
Mode-S A3A138 has broadcast 1 distinct callsign, including N333CT.