Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC4DFB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N892NN · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
AC4DFB
Octal
53046773
Decimal
11,292,155
Country
US
Tail
N892NN
Type
B738
No current signal · last broadcast 1h ago
Flights observed
509
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AC4DFB.

Country allocation

The ICAO 24-bit address AC4DFB 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 20 distinct

Callsign Airline Flights Last seen
AAL1177 - 8 2026-06-18
AAL2768 - 6 2026-07-07
AAL1523 American Airlines 6 2026-06-07
AAL3174 American Airlines 5 2026-06-12
AAL2969 American Airlines 5 2026-04-20
AAL1911 - 5 2026-04-13
AAL3074 American Airlines 4 2026-04-16
AAL2561 - 4 2026-04-15
AAL2069 - 4 2026-07-01
AAL1897 American Airlines 4 2026-06-04
AAL1695 American Airlines 4 2026-06-08
AAL1669 - 4 2026-06-19
AAL1476 American Airlines 4 2026-06-02
AAL1138 - 4 2026-07-12
AAL383 - 3 2026-07-10
AAL3269 American Airlines 3 2026-04-23
AAL3249 American Airlines 3 2026-05-27
AAL3116 - 3 2026-07-05
AAL2824 American Airlines 3 2026-05-18
AAL2646 - 3 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAL2293 - Jul 14, 04:35 UTCJul 14, 05:35 UTC1h 0m
2026-07-13 AAL1437 - Jul 13, 22:55 UTCJul 14, 02:30 UTC3h 35m
2026-07-13 AAL2080 - Jul 13, 18:45 UTCJul 13, 20:30 UTC1h 45m
2026-07-13 AAL1890 - Jul 13, 15:50 UTCJul 13, 17:20 UTC1h 30m
2026-07-13 AAL1890 GRR → CLT Jul 13, 15:48 UTCJul 13, 17:11 UTC1h 23m
2026-07-13 AAL1890 - Jul 13, 13:05 UTCJul 13, 14:25 UTC1h 20m
2026-07-13 AAL3235 CHS → CLT Jul 13, 10:45 UTCJul 13, 11:19 UTC34m
2026-07-13 AAL1659 - Jul 13, 01:35 UTCJul 13, 02:10 UTC35m
2026-07-12 AAL400 - Jul 12, 22:05 UTCJul 12, 23:45 UTC1h 40m
2026-07-12 AAL400 MIA → CLT Jul 12, 22:05 UTCJul 12, 23:43 UTC1h 38m
2026-07-12 AAL1138 KIN → MIA Jul 12, 17:49 UTCJul 12, 19:10 UTC1h 21m
2026-07-12 AAL1138 - Jul 12, 15:05 UTCJul 12, 18:45 UTC3h 40m
2026-07-11 AAL2370 - Jul 11, 23:55 UTCJul 12, 13:05 UTC13h 10m
2026-07-11 AAL350 CLT → GCM Jul 11, 17:25 UTCJul 11, 22:15 UTC4h 50m
2026-07-11 AAL1449 PVD → CLT Jul 11, 14:30 UTCJul 11, 16:10 UTC1h 40m
2026-07-11 AAL1449 PVD → CLT Jul 11, 14:30 UTCJul 11, 16:03 UTC1h 33m
2026-07-11 AAL1449 PVD → CLT Jul 11, 11:45 UTCJul 11, 13:10 UTC1h 25m
2026-07-11 AAL1942 - Jul 11, 04:55 UTCJul 11, 06:20 UTC1h 25m
2026-07-11 AAL1724 ORD → LGA Jul 11, 01:10 UTCJul 11, 02:40 UTC1h 30m
2026-07-10 AAL1760 DEN → ORD Jul 10, 21:30 UTCJul 10, 23:35 UTC2h 5m
2026-07-10 AAL1760 DEN → ORD Jul 10, 21:28 UTCJul 10, 23:26 UTC1h 58m
2026-07-10 AAL1760 ORD → DEN Jul 10, 18:15 UTCJul 10, 20:20 UTC2h 5m
2026-07-10 AAL383 - Jul 10, 13:25 UTCJul 10, 16:45 UTC3h 20m
2026-07-09 AAL650 - Jul 9, 23:00 UTCJul 10, 03:45 UTC4h 45m
2026-07-09 AAL650 - Jul 9, 17:40 UTCJul 9, 21:40 UTC4h 0m
2026-07-09 AAL1892 PHX → LAX Jul 9, 15:23 UTCJul 9, 16:20 UTC57m
2026-07-09 AAL1892 - Jul 9, 15:25 UTCJul 9, 16:20 UTC55m
2026-07-09 AAL2544 - Jul 9, 02:05 UTCJul 9, 03:40 UTC1h 35m
2026-07-08 AAL1253 - Jul 8, 20:40 UTCJul 9, 00:55 UTC4h 15m
2026-07-08 AAL1253 ORD → SFO Jul 8, 20:39 UTCJul 9, 00:53 UTC4h 14m
2026-07-08 AAL2452 - Jul 8, 16:50 UTCJul 8, 18:35 UTC1h 45m
2026-07-08 AAL2452 - Jul 8, 13:50 UTCJul 8, 15:30 UTC1h 40m
2026-07-08 AAL2949 LAS → ORD Jul 8, 08:10 UTCJul 8, 11:15 UTC3h 5m
2026-07-08 AAL1880 - Jul 8, 03:45 UTCJul 8, 06:55 UTC3h 10m
2026-07-08 AAL1880 ORD → LAS Jul 8, 03:42 UTCJul 8, 06:52 UTC3h 10m
2026-07-07 AAL2768 - Jul 7, 22:35 UTCJul 8, 00:45 UTC2h 10m
2026-07-07 AAL2768 TPA → ORD Jul 7, 22:35 UTCJul 8, 00:55 UTC2h 20m
2026-07-07 AAL2768 ORD → TPA Jul 7, 18:45 UTCJul 7, 20:55 UTC2h 10m
2026-07-07 AAL2614 - Jul 7, 13:30 UTCJul 7, 17:15 UTC3h 45m
2026-07-07 AAL2614 SFO → ORD Jul 7, 13:28 UTCJul 7, 17:11 UTC3h 43m
2026-07-07 AAL1620 - Jul 7, 02:30 UTCJul 7, 06:25 UTC3h 55m
2026-07-06 AAL1915 - Jul 6, 22:45 UTCJul 7, 00:50 UTC2h 5m
2026-07-06 AAL1915 - Jul 6, 16:00 UTCJul 6, 18:20 UTC2h 20m
2026-07-05 AAL1592 - Jul 5, 23:10 UTCJul 6, 01:45 UTC2h 35m
2026-07-05 AAL3116 - Jul 5, 20:30 UTCJul 5, 21:15 UTC45m
2026-07-05 AAL3116 PHL → BOS Jul 5, 20:27 UTCJul 5, 21:15 UTC48m
2026-07-05 AAL3116 PHL → PHL Jul 5, 19:10 UTCJul 5, 19:20 UTC10m
2026-07-05 AAL2344 MIA → ORD Jul 5, 14:45 UTCJul 5, 17:55 UTC3h 10m
2026-07-04 AAL1104 PHL → DEN Jul 4, 20:05 UTCJul 4, 23:35 UTC3h 30m
2026-07-04 AAL1104 PHL → DEN Jul 4, 20:01 UTCJul 4, 23:24 UTC3h 23m

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 N892NN page for operator, model, and routing details .

Mode-S AC4DFB frequently asked

What is Mode-S code AC4DFB?
AC4DFB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N892NN.
Where is Mode-S AC4DFB registered?
Mode-S code AC4DFB 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 AC4DFB broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4DFB, octal 53046773, decimal 11,292,155.
What flights does AC4DFB operate?
Mode-S AC4DFB has broadcast 20 distinct callsigns, including AAL1177, AAL2768, AAL1523, AAL3174, AAL2969.