Apparatus

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sensors Mode-S transponder

AB4DC5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8274E · CESSNA 172 Skyhawk · operated by CHRISTIANSEN AVIATION LLC

Hex
AB4DC5
Octal
52646705
Decimal
11,226,565
Country
US
Tail
N8274E
Type
C172
No current signal · last broadcast 5d ago
Flights observed
74
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S AB4DC5.

Country allocation

The ICAO 24-bit address AB4DC5 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
N8274E - 74 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N8274E - Jul 16, 17:30 UTCJul 16, 17:54 UTC25m
2026-07-16 N8274E ECP → ECP Jul 16, 14:45 UTCJul 16, 15:49 UTC1h 5m
2026-07-16 N8274E - Jul 16, 11:54 UTCJul 16, 13:30 UTC1h 35m
2026-07-15 N8274E - Jul 15, 21:10 UTCJul 15, 22:55 UTC1h 45m
2026-07-15 N8274E ECP → ECP Jul 15, 18:55 UTCJul 15, 19:45 UTC50m
2026-07-15 N8274E - Jul 15, 15:30 UTCJul 15, 16:25 UTC55m
2026-07-15 N8274E ECP → ECP Jul 15, 11:55 UTCJul 15, 13:35 UTC1h 40m
2026-07-14 N8274E - Jul 14, 21:20 UTCJul 14, 22:00 UTC40m
2026-07-14 N8274E - Jul 14, 18:40 UTCJul 14, 19:40 UTC1h 0m
2026-07-14 N8274E - Jul 14, 12:00 UTCJul 14, 12:40 UTC40m
2026-07-10 N8274E ECP → ECP Jul 10, 20:10 UTCJul 10, 20:20 UTC10m
2026-07-10 N8274E - Jul 10, 15:35 UTCJul 10, 16:05 UTC30m
2026-07-09 N8274E - Jul 9, 16:35 UTCJul 9, 16:50 UTC15m
2026-07-08 N8274E - Jul 8, 14:55 UTCJul 8, 15:40 UTC45m
2026-07-08 N8274E - Jul 8, 11:45 UTCJul 8, 13:50 UTC2h 5m
2026-07-02 N8274E - Jul 2, 22:25 UTCJul 2, 22:40 UTC15m
2026-07-02 N8274E - Jul 2, 21:10 UTCJul 2, 21:45 UTC35m
2026-07-01 N8274E - Jul 1, 22:45 UTCJul 1, 22:55 UTC10m
2026-07-01 N8274E - Jul 1, 21:25 UTCJul 1, 21:35 UTC10m
2026-07-01 N8274E - Jul 1, 19:05 UTCJul 1, 19:20 UTC15m
2026-07-01 N8274E - Jul 1, 17:55 UTCJul 1, 18:15 UTC20m
2026-07-01 N8274E - Jul 1, 15:50 UTCJul 1, 16:10 UTC20m
2026-07-01 N8274E - Jul 1, 14:40 UTCJul 1, 14:55 UTC15m
2026-06-30 N8274E ECP → ECP Jun 30, 18:55 UTCJun 30, 20:05 UTC1h 10m
2026-06-30 N8274E ECP → ECP Jun 30, 11:50 UTCJun 30, 13:00 UTC1h 10m
2026-06-29 N8274E - Jun 29, 21:30 UTCJun 29, 22:35 UTC1h 5m
2026-06-28 N8274E - Jun 28, 21:24 UTCJun 28, 21:45 UTC20m
2026-06-28 N8274E - Jun 28, 20:25 UTCJun 28, 20:39 UTC15m
2026-06-25 N8274E - Jun 25, 21:25 UTCJun 25, 22:29 UTC1h 5m
2026-06-25 N8274E - Jun 25, 19:05 UTCJun 25, 20:05 UTC1h 0m
2026-06-24 N8274E - Jun 24, 18:09 UTCJun 24, 18:34 UTC25m
2026-06-24 N8274E - Jun 24, 15:39 UTCJun 24, 15:59 UTC20m
2026-06-24 N8274E - Jun 24, 12:14 UTCJun 24, 12:54 UTC40m
2026-06-23 N8274E - Jun 23, 17:34 UTCJun 23, 18:39 UTC1h 5m
2026-06-22 N8274E - Jun 22, 21:35 UTCJun 22, 22:24 UTC50m
2026-06-22 N8274E - Jun 22, 18:49 UTCJun 22, 20:04 UTC1h 15m
2026-06-22 N8274E - Jun 22, 12:15 UTCJun 22, 13:29 UTC1h 15m
2026-06-13 N8274E - Jun 13, 18:35 UTCJun 13, 19:00 UTC25m
2026-06-13 N8274E - Jun 13, 15:00 UTCJun 13, 16:20 UTC1h 20m
2026-06-11 N8274E - Jun 11, 14:25 UTCJun 11, 14:50 UTC25m
2026-06-10 N8274E - Jun 10, 20:35 UTCJun 10, 20:50 UTC15m
2026-06-10 N8274E - Jun 10, 16:15 UTCJun 10, 16:25 UTC10m
2026-06-10 N8274E - Jun 10, 15:05 UTCJun 10, 15:45 UTC40m
2026-06-09 N8274E - Jun 9, 21:05 UTCJun 9, 21:45 UTC40m
2026-06-09 N8274E - Jun 9, 18:25 UTCJun 9, 18:40 UTC15m
2026-06-08 N8274E - Jun 8, 20:10 UTCJun 8, 20:40 UTC30m
2026-06-08 N8274E - Jun 8, 18:00 UTCJun 8, 18:40 UTC40m
2026-06-08 N8274E - Jun 8, 15:15 UTCJun 8, 15:50 UTC35m
2026-06-06 N8274E - Jun 6, 15:15 UTCJun 6, 16:20 UTC1h 5m
2026-06-05 N8274E - Jun 5, 15:10 UTCJun 5, 15:40 UTC30m

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 N8274E page for operator, model, and routing details .

Mode-S AB4DC5 frequently asked

What is Mode-S code AB4DC5?
AB4DC5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8274E.
Where is Mode-S AB4DC5 registered?
Mode-S code AB4DC5 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 AB4DC5 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4DC5, octal 52646705, decimal 11,226,565.
What flights does AB4DC5 operate?
Mode-S AB4DC5 has broadcast 1 distinct callsign, including N8274E.