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sensors Mode-S transponder

AC4D18

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N892DL · PIPER PA-28-140/150/160/180 · operated by BD AVIATION LLC

Hex
AC4D18
Octal
53046430
Decimal
11,291,928
Country
US
Tail
N892DL
Type
P28A
No current signal · last broadcast Jul 24, 19:30 UTC
Flights observed
224
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 19:30 UTC

Last known position

Most recent position reported by Mode-S AC4D18.

Country allocation

The ICAO 24-bit address AC4D18 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
N892DL - 222 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N892DL - Jul 24, 18:30 UTCJul 24, 19:30 UTC1h 0m
2026-07-23 N892DL - Jul 23, 20:35 UTCJul 23, 22:00 UTC1h 25m
2026-07-22 N892DL - Jul 22, 14:35 UTCJul 22, 15:10 UTC35m
2026-07-21 N892DL CPS → CPS Jul 21, 18:45 UTCJul 21, 19:10 UTC25m
2026-07-21 N892DL - Jul 21, 14:30 UTCJul 21, 15:30 UTC1h 0m
2026-07-21 N892DL - Jul 21, 13:05 UTCJul 21, 13:40 UTC35m
2026-07-21 N892DL - Jul 21, 12:35 UTCJul 21, 13:00 UTC25m
2026-07-20 N892DL CPS → CPS Jul 20, 20:35 UTCJul 20, 21:45 UTC1h 10m
2026-07-20 N892DL - Jul 20, 16:30 UTCJul 20, 17:35 UTC1h 5m
2026-07-20 N892DL CPS → CPS Jul 20, 14:50 UTCJul 20, 15:40 UTC50m
2026-07-20 N892DL - Jul 20, 12:45 UTCJul 20, 13:55 UTC1h 10m
2026-07-19 N892DL - Jul 19, 20:50 UTCJul 19, 21:50 UTC1h 0m
2026-07-19 N892DL - Jul 19, 15:05 UTCJul 19, 15:45 UTC40m
2026-07-18 N892DL - Jul 18, 17:30 UTCJul 18, 18:35 UTC1h 5m
2026-07-18 N892DL - Jul 18, 14:50 UTCJul 18, 16:00 UTC1h 10m
2026-07-18 N892DL - Jul 18, 12:50 UTCJul 18, 14:00 UTC1h 10m
2026-07-16 N892DL - Jul 16, 13:05 UTCJul 16, 13:54 UTC50m
2026-07-15 N892DL - Jul 15, 22:15 UTCJul 15, 23:30 UTC1h 15m
2026-07-15 N892DL - Jul 15, 16:50 UTCJul 15, 18:00 UTC1h 10m
2026-07-14 N892DL - Jul 14, 22:50 UTCJul 14, 23:50 UTC1h 0m
2026-07-14 N892DL - Jul 14, 16:35 UTCJul 14, 17:20 UTC45m
2026-07-14 N892DL CPS → CPS Jul 14, 12:25 UTCJul 14, 13:35 UTC1h 10m
2026-07-13 N892DL - Jul 13, 18:20 UTCJul 13, 19:20 UTC1h 0m
2026-07-13 N892DL - Jul 13, 14:05 UTCJul 13, 15:40 UTC1h 35m
2026-07-13 N892DL - Jul 13, 12:45 UTCJul 13, 14:00 UTC1h 15m
2026-07-12 N892DL - Jul 12, 16:45 UTCJul 12, 18:50 UTC2h 5m
2026-07-09 N892DL - Jul 9, 21:10 UTCJul 9, 21:50 UTC40m
2026-07-09 N892DL - Jul 9, 18:50 UTCJul 9, 19:45 UTC55m
2026-07-09 N892DL - Jul 9, 16:20 UTCJul 9, 17:35 UTC1h 15m
2026-07-09 N892DL - Jul 9, 14:30 UTCJul 9, 15:10 UTC40m
2026-07-07 N892DL - Jul 7, 19:35 UTCJul 7, 19:45 UTC10m
2026-07-07 N892DL - Jul 7, 18:45 UTCJul 7, 19:00 UTC15m
2026-07-07 N892DL - Jul 7, 15:00 UTCJul 7, 15:35 UTC35m
2026-07-06 N892DL - Jul 6, 22:40 UTCJul 6, 23:45 UTC1h 5m
2026-07-06 N892DL - Jul 6, 20:55 UTCJul 6, 21:35 UTC40m
2026-07-06 N892DL - Jul 6, 18:40 UTCJul 6, 19:25 UTC45m
2026-07-06 N892DL - Jul 6, 16:30 UTCJul 6, 17:05 UTC35m
2026-07-06 N892DL - Jul 6, 12:50 UTCJul 6, 13:35 UTC45m
2026-07-05 N892DL - Jul 5, 17:45 UTCJul 5, 18:00 UTC15m
2026-07-04 N892DL - Jul 4, 14:50 UTCJul 4, 15:35 UTC45m
2026-07-03 N892DL - Jul 3, 16:45 UTCJul 3, 16:55 UTC10m
2026-07-03 N892DL - Jul 3, 12:50 UTCJul 3, 13:55 UTC1h 5m
2026-07-02 N892DL - Jul 2, 22:30 UTCJul 2, 23:10 UTC40m
2026-07-02 N892DL - Jul 2, 18:25 UTCJul 2, 18:35 UTC10m
2026-07-02 N892DL - Jul 2, 14:55 UTCJul 2, 15:30 UTC35m
2026-07-02 N892DL - Jul 2, 12:45 UTCJul 2, 13:50 UTC1h 5m
2026-07-01 N892DL - Jul 1, 14:45 UTCJul 1, 15:00 UTC15m
2026-07-01 N892DL - Jul 1, 12:35 UTCJul 1, 13:25 UTC50m
2026-06-30 N892DL - Jun 30, 20:25 UTCJun 30, 21:40 UTC1h 15m
2026-06-30 N892DL - Jun 30, 18:30 UTCJun 30, 19:15 UTC45m

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 N892DL page for operator, model, and routing details .

Mode-S AC4D18 frequently asked

What is Mode-S code AC4D18?
AC4D18 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N892DL.
Where is Mode-S AC4D18 registered?
Mode-S code AC4D18 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 AC4D18 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 19:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4D18, octal 53046430, decimal 11,291,928.
What flights does AC4D18 operate?
Mode-S AC4D18 has broadcast 1 distinct callsign, including N892DL.