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sensors Mode-S transponder

AB1C33

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N815CT · CESSNA 172R Cutlass RG · operated by COAST FLIGHT TRAINING AND MANAGEMENT INC

Hex
AB1C33
Octal
52616063
Decimal
11,213,875
Country
US
Tail
N815CT
Type
C72R
No current signal · last broadcast 13d ago
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S AB1C33.

Country allocation

The ICAO 24-bit address AB1C33 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
N815CT - 112 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N815CT - Jul 25, 16:00 UTCJul 25, 17:15 UTC1h 15m
2026-07-24 N815CT - Jul 24, 22:50 UTCJul 25, 00:10 UTC1h 20m
2026-07-24 N815CT - Jul 24, 20:00 UTCJul 24, 21:35 UTC1h 35m
2026-07-23 N815CT - Jul 23, 14:40 UTCJul 23, 16:10 UTC1h 30m
2026-07-22 N815CT - Jul 22, 19:00 UTCJul 22, 20:25 UTC1h 25m
2026-07-21 N815CT - Jul 21, 18:40 UTCJul 21, 20:30 UTC1h 50m
2026-07-20 N815CT - Jul 20, 23:35 UTCJul 21, 01:00 UTC1h 25m
2026-07-20 N815CT - Jul 20, 19:40 UTCJul 20, 21:15 UTC1h 35m
2026-07-20 N815CT - Jul 20, 16:50 UTCJul 20, 17:50 UTC1h 0m
2026-07-19 N815CT - Jul 19, 23:05 UTCJul 20, 01:05 UTC2h 0m
2026-07-18 N815CT - Jul 18, 23:40 UTCJul 19, 00:45 UTC1h 5m
2026-07-18 N815CT - Jul 18, 20:05 UTCJul 18, 20:25 UTC20m
2026-07-17 N815CT - Jul 17, 20:04 UTCJul 17, 21:25 UTC1h 20m
2026-07-12 N815CT - Jul 12, 19:05 UTCJul 12, 20:30 UTC1h 25m
2026-07-10 N815CT - Jul 10, 15:55 UTCJul 10, 17:15 UTC1h 20m
2026-07-10 N815CT - Jul 10, 00:40 UTCJul 10, 01:35 UTC55m
2026-07-09 N815CT - Jul 9, 16:25 UTCJul 9, 18:50 UTC2h 25m
2026-07-08 N815CT - Jul 8, 20:05 UTCJul 8, 22:05 UTC2h 0m
2026-07-08 N815CT - Jul 8, 16:35 UTCJul 8, 16:55 UTC20m
2026-07-07 N815CT - Jul 7, 23:40 UTCJul 8, 01:05 UTC1h 25m
2026-07-07 N815CT - Jul 7, 20:50 UTCJul 7, 22:10 UTC1h 20m
2026-07-06 N815CT - Jul 6, 18:45 UTCJul 6, 19:55 UTC1h 10m
2026-07-05 N815CT - Jul 5, 20:10 UTCJul 5, 22:20 UTC2h 10m
2026-07-05 N815CT - Jul 5, 16:30 UTCJul 5, 16:50 UTC20m
2026-07-04 N815CT - Jul 4, 00:20 UTCJul 4, 02:00 UTC1h 40m
2026-07-03 N815CT - Jul 3, 21:50 UTCJul 3, 22:05 UTC15m
2026-07-03 N815CT - Jul 3, 15:20 UTCJul 3, 17:05 UTC1h 45m
2026-07-02 N815CT - Jul 2, 22:25 UTCJul 2, 23:00 UTC35m
2026-07-02 N815CT - Jul 2, 17:20 UTCJul 2, 17:50 UTC30m
2026-07-02 N815CT - Jul 2, 14:15 UTCJul 2, 15:25 UTC1h 10m
2026-07-01 N815CT - Jul 1, 23:25 UTCJul 2, 00:50 UTC1h 25m
2026-06-30 N815CT - Jun 30, 20:05 UTCJun 30, 22:00 UTC1h 55m
2026-06-30 N815CT - Jun 30, 15:00 UTCJun 30, 18:25 UTC3h 25m
2026-06-26 N815CT - Jun 26, 14:25 UTCJun 26, 15:10 UTC45m
2026-06-26 N815CT - Jun 26, 02:30 UTCJun 26, 03:29 UTC1h 0m
2026-06-24 N815CT - Jun 24, 02:30 UTCJun 24, 05:49 UTC3h 20m
2026-06-22 N815CT - Jun 22, 18:44 UTCJun 22, 20:24 UTC1h 40m
2026-06-19 N815CT - Jun 19, 20:59 UTCJun 19, 22:14 UTC1h 15m
2026-06-19 N815CT - Jun 19, 17:39 UTCJun 19, 18:09 UTC30m
2026-06-17 N815CT - Jun 17, 22:20 UTCJun 17, 23:35 UTC1h 15m
2026-06-17 N815CT - Jun 17, 18:25 UTCJun 17, 19:45 UTC1h 20m
2026-06-15 N815CT - Jun 15, 21:09 UTCJun 15, 22:59 UTC1h 50m
2026-06-11 N815CT - Jun 11, 23:50 UTCJun 12, 00:55 UTC1h 6m
2026-06-11 N815CT - Jun 11, 21:05 UTCJun 11, 22:25 UTC1h 20m
2026-06-11 N815CT - Jun 11, 18:25 UTCJun 11, 19:30 UTC1h 5m
2026-06-10 N815CT - Jun 10, 22:50 UTCJun 11, 00:05 UTC1h 15m
2026-06-09 N815CT - Jun 9, 22:55 UTCJun 10, 00:40 UTC1h 45m
2026-06-09 N815CT - Jun 9, 18:35 UTCJun 9, 19:10 UTC35m
2026-06-09 N815CT - Jun 9, 16:45 UTCJun 9, 17:10 UTC25m
2026-06-02 N815CT - Jun 2, 20:50 UTCJun 2, 22:10 UTC1h 20m

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 N815CT page for operator, model, and routing details .

Mode-S AB1C33 frequently asked

What is Mode-S code AB1C33?
AB1C33 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N815CT.
Where is Mode-S AB1C33 registered?
Mode-S code AB1C33 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 AB1C33 broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1C33, octal 52616063, decimal 11,213,875.
What flights does AB1C33 operate?
Mode-S AB1C33 has broadcast 1 distinct callsign, including N815CT.