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 Jul 26, 22:45 UTC
Flights observed
568
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

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
AAL2969 - 6 2026-07-22
AAL2768 - 6 2026-07-07
AAL1523 American Airlines 6 2026-06-07
AAL3174 American Airlines 5 2026-06-12
AAL1911 - 5 2026-04-13
AAL3192 American Airlines 4 2026-07-25
AAL3074 American Airlines 4 2026-04-16
AAL2907 American Airlines 4 2026-07-24
AAL2561 - 4 2026-04-15
AAL2416 - 4 2026-07-20
AAL2340 - 4 2026-07-17
AAL2069 - 4 2026-07-01
AAL2037 American Airlines 4 2026-07-26
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL3039 SAN → DFW Jul 26, 20:15 UTCJul 26, 22:45 UTC2h 30m
2026-07-26 AAL2037 PHL → DFW Jul 26, 17:45 UTCJul 26, 18:25 UTC40m
2026-07-26 AAL2574 STL → PHX Jul 26, 13:10 UTCJul 26, 15:50 UTC2h 40m
2026-07-25 AAL2686 CLT → GRR Jul 25, 23:10 UTCJul 26, 00:35 UTC1h 25m
2026-07-25 AAL2686 CLT → GRR Jul 25, 23:06 UTCJul 26, 00:34 UTC1h 28m
2026-07-25 AAL1294 PHL → PHX Jul 25, 19:56 UTCJul 25, 21:21 UTC1h 25m
2026-07-25 AAL1294 PHL → PHX Jul 25, 20:00 UTCJul 25, 21:25 UTC1h 25m
2026-07-25 AAL1766 LGA → ORD Jul 25, 15:05 UTCJul 25, 18:10 UTC3h 5m
2026-07-25 AAL2896 LGA → BOS Jul 25, 11:25 UTCJul 25, 13:15 UTC1h 50m
2026-07-25 AAL2592 DCA → BTV Jul 25, 07:25 UTCJul 25, 09:30 UTC2h 5m
2026-07-25 AAL2592 DCA → BTV Jul 25, 05:10 UTCJul 25, 05:20 UTC10m
2026-07-25 AAL3192 PHX → PHL Jul 25, 02:55 UTCJul 25, 03:15 UTC20m
2026-07-24 AAL3192 PHX → PHL Jul 24, 23:05 UTCJul 25, 00:45 UTC1h 40m
2026-07-24 AAL2907 PHL → SRQ Jul 24, 19:55 UTCJul 24, 21:20 UTC1h 25m
2026-07-24 AAL2907 PHL → SRQ Jul 24, 19:49 UTCJul 24, 21:28 UTC1h 39m
2026-07-24 AAL3080 SVD → JFK Jul 24, 16:40 UTCJul 24, 18:15 UTC1h 35m
2026-07-24 AAL3080 SVD → JFK Jul 24, 16:33 UTCJul 24, 18:10 UTC1h 37m
2026-07-24 AAL3080 SVD → JFK Jul 24, 14:00 UTCJul 24, 15:15 UTC1h 15m
2026-07-24 AAL1097 CLT → BDL Jul 24, 10:35 UTCJul 24, 12:05 UTC1h 30m
2026-07-24 AAL1267 CLE → CLT Jul 24, 02:05 UTCJul 24, 04:25 UTC2h 20m
2026-07-23 AAL1302 CLT → JAX Jul 23, 19:30 UTCJul 23, 22:00 UTC2h 30m
2026-07-23 AAL3231 RSW → ORD Jul 23, 15:15 UTCJul 23, 17:05 UTC1h 50m
2026-07-23 AAL1115 RDU → PHL Jul 23, 12:35 UTCJul 23, 13:35 UTC1h 0m
2026-07-22 AAL2969 LGA → RDU Jul 22, 23:50 UTCJul 23, 01:10 UTC1h 20m
2026-07-22 AAL2302 LGA → ORD Jul 22, 19:40 UTCJul 22, 21:30 UTC1h 50m
2026-07-22 AAL2302 LGA → ORD Jul 22, 16:15 UTCJul 22, 18:10 UTC1h 55m
2026-07-22 AAL3096 CLT → STL Jul 22, 11:15 UTCJul 22, 14:15 UTC3h 0m
2026-07-21 AAL1647 MCO → ORD Jul 21, 18:30 UTCJul 22, 00:50 UTC6h 20m
2026-07-21 AAL2599 BUR → DFW Jul 21, 14:15 UTCJul 21, 17:00 UTC2h 45m
2026-07-21 AAL2599 BUR → DFW Jul 21, 14:12 UTCJul 21, 16:57 UTC2h 45m
2026-07-21 AAL2597 DFW → BUR Jul 21, 02:25 UTCJul 21, 05:10 UTC2h 45m
2026-07-20 AAL3092 PHL → MCO Jul 20, 15:40 UTCJul 21, 00:20 UTC8h 40m
2026-07-20 AAL2193 - Jul 20, 12:05 UTCJul 20, 14:00 UTC1h 55m
2026-07-20 AAL1109 DFW → TUS Jul 20, 04:20 UTCJul 20, 06:10 UTC1h 50m
2026-07-20 AAL1109 DFW → TUS Jul 20, 04:17 UTCJul 20, 06:05 UTC1h 48m
2026-07-20 AAL2416 - Jul 20, 00:00 UTCJul 20, 02:35 UTC2h 35m
2026-07-19 AAL2416 - Jul 19, 20:10 UTCJul 19, 22:45 UTC2h 35m
2026-07-19 AAL2789 BDL → ORD Jul 19, 09:55 UTCJul 19, 12:00 UTC2h 5m
2026-07-19 AAL2096 BOS → PHL Jul 19, 01:25 UTCJul 19, 03:15 UTC1h 50m
2026-07-19 AAL2096 BOS → PHL Jul 19, 01:24 UTCJul 19, 03:14 UTC1h 50m
2026-07-18 AAL250 - Jul 18, 19:25 UTCJul 18, 23:10 UTC3h 45m
2026-07-18 AAL250 MEX → ORD Jul 18, 19:25 UTCJul 18, 23:07 UTC3h 42m
2026-07-18 AAL249 - Jul 18, 14:15 UTCJul 18, 17:45 UTC3h 30m
2026-07-17 AAL2340 PHL → DFW Jul 17, 22:49 UTCJul 18, 01:54 UTC3h 5m
2026-07-17 AAL2340 - Jul 17, 17:15 UTCJul 17, 20:10 UTC2h 55m
2026-07-17 AAL2771 DEN → ORD Jul 17, 13:25 UTCJul 17, 15:29 UTC2h 5m
2026-07-17 AAL1387 ORD → DEN Jul 17, 04:54 UTCJul 17, 06:50 UTC1h 55m
2026-07-17 AAL1387 ORD → DEN Jul 17, 04:51 UTCJul 17, 06:52 UTC2h 1m
2026-07-16 AAL2275 - Jul 16, 22:59 UTCJul 17, 01:45 UTC2h 45m
2026-07-16 AAL2275 - Jul 16, 18:59 UTCJul 16, 21:40 UTC2h 40m

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 Jul 26, 22:45 UTC.
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, AAL2969, AAL2768, AAL1523, AAL3174.