Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC066B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N874NN · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
AC066B
Octal
53003153
Decimal
11,273,835
Country
US
Tail
N874NN
Type
B738
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
414
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AC066B.

Country allocation

The ICAO 24-bit address AC066B 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
AAL2973 American Airlines 8 2026-05-13
AAL1948 - 6 2026-07-09
AAL975 - 5 2026-07-16
AAL1531 American Airlines 5 2026-07-20
AAL463 - 4 2026-07-06
AAL1710 - 4 2026-06-24
AAL1566 American Airlines 4 2026-04-18
AAL1470 - 4 2026-04-13
AAL1364 - 4 2026-06-21
AAL1029 American Airlines 4 2026-04-17
AAL762 - 3 2026-07-22
AAL395 American Airlines 3 2026-04-18
AAL359 American Airlines 3 2026-07-25
AAL2757 - 3 2026-07-18
AAL2617 - 3 2026-06-14
AAL2433 American Airlines 3 2026-07-26
AAL2416 - 3 2026-07-07
AAL2296 - 3 2026-07-16
AAL2262 American Airlines 3 2026-05-22
AAL2250 - 3 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1554 DCA → MIA Jul 26, 19:35 UTCJul 26, 21:30 UTC1h 55m
2026-07-26 AAL2433 PHL → SJU Jul 26, 15:30 UTCJul 26, 18:05 UTC2h 35m
2026-07-26 AAL2433 PHL → SJU Jul 26, 15:29 UTCJul 26, 18:00 UTC2h 31m
2026-07-26 AAL2433 PHL → SJU Jul 26, 12:00 UTCJul 26, 14:15 UTC2h 15m
2026-07-26 AAL1734 DTW → DFW Jul 26, 01:10 UTCJul 26, 03:00 UTC1h 50m
2026-07-25 AAL1734 DTW → DFW Jul 25, 21:00 UTCJul 25, 23:05 UTC2h 5m
2026-07-25 AAL359 LGA → ORD Jul 25, 15:10 UTCJul 25, 18:55 UTC3h 45m
2026-07-24 AAL1620 PHX → CVG Jul 24, 23:50 UTCJul 25, 03:55 UTC4h 5m
2026-07-24 AAL3254 PHL → DFW Jul 24, 20:20 UTCJul 24, 21:50 UTC1h 30m
2026-07-24 AAL1606 DCA → ORD Jul 24, 17:00 UTCJul 24, 19:10 UTC2h 10m
2026-07-24 AAL1606 DCA → ORD Jul 24, 16:57 UTCJul 24, 18:53 UTC1h 56m
2026-07-24 AAL902 CID → DFW Jul 24, 14:35 UTCJul 24, 15:15 UTC40m
2026-07-23 AAL901 PHL → PIT Jul 23, 23:35 UTCJul 24, 00:00 UTC25m
2026-07-23 AAL901 PHL → PIT Jul 23, 23:33 UTCJul 24, 01:46 UTC2h 13m
2026-07-23 AAL887 BNA → PHL Jul 23, 13:45 UTCJul 23, 21:15 UTC7h 30m
2026-07-23 AAL3230 DFW → XNA Jul 23, 10:10 UTCJul 23, 11:35 UTC1h 25m
2026-07-23 AAL3230 DFW → XNA Jul 23, 10:08 UTCJul 23, 11:33 UTC1h 25m
2026-07-23 AAL3113 MIA → MSY Jul 23, 02:45 UTCJul 23, 04:10 UTC1h 25m
2026-07-22 AAL3131 DFW → DTW Jul 22, 23:55 UTCJul 23, 01:30 UTC1h 35m
2026-07-22 AAL2664 DCA → MIA Jul 22, 19:49 UTCJul 22, 22:12 UTC2h 23m
2026-07-22 AAL2664 DCA → MIA Jul 22, 19:50 UTCJul 22, 22:05 UTC2h 15m
2026-07-22 AAL1624 PHL → LAS Jul 22, 15:15 UTCJul 22, 17:45 UTC2h 30m
2026-07-22 AAL762 - Jul 22, 11:10 UTCJul 22, 13:40 UTC2h 30m
2026-07-22 AAL1761 DFW → PIT Jul 22, 01:35 UTCJul 22, 03:55 UTC2h 20m
2026-07-21 AAL2213 CLT → BDL Jul 21, 21:05 UTCJul 21, 23:25 UTC2h 20m
2026-07-21 AAL2213 CLT → BDL Jul 21, 17:15 UTCJul 21, 19:15 UTC2h 0m
2026-07-21 AAL1034 GDL → DFW Jul 21, 14:10 UTCJul 21, 15:40 UTC1h 30m
2026-07-21 AAL2063 DCA → LGA Jul 21, 02:35 UTCJul 21, 03:50 UTC1h 15m
2026-07-21 AAL2063 DCA → LGA Jul 21, 02:31 UTCJul 21, 04:31 UTC2h 0m
2026-07-20 AAL1531 PHL → LAX Jul 20, 22:05 UTCJul 21, 00:50 UTC2h 45m
2026-07-20 AAL1531 PHL → LAX Jul 20, 22:04 UTCJul 21, 00:48 UTC2h 44m
2026-07-20 AAL1531 PHL → LAX Jul 20, 17:50 UTCJul 20, 20:20 UTC2h 30m
2026-07-19 AAL399R BJX → DFW Jul 19, 23:10 UTCJul 20, 16:15 UTC17h 5m
2026-07-19 AAL1114 PVR → DFW Jul 19, 17:50 UTCJul 19, 20:00 UTC2h 10m
2026-07-19 AAL1114 DFW → DFW Jul 19, 14:05 UTCJul 19, 20:00 UTC5h 55m
2026-07-19 AAL468 MSY → DFW Jul 19, 11:00 UTCJul 19, 12:15 UTC1h 15m
2026-07-19 AAL468 MSY → DFW Jul 19, 10:59 UTCJul 19, 12:13 UTC1h 14m
2026-07-19 AAL2196 - Jul 19, 01:10 UTCJul 19, 02:45 UTC1h 35m
2026-07-19 AAL2196 MIA → MSY Jul 19, 01:08 UTCJul 19, 02:45 UTC1h 37m
2026-07-18 AAL2757 - Jul 18, 20:15 UTCJul 18, 22:40 UTC2h 25m
2026-07-18 AAL2757 - Jul 18, 17:40 UTCJul 18, 17:50 UTC10m
2026-07-18 AAL2757 - Jul 18, 14:45 UTCJul 18, 17:05 UTC2h 20m
2026-07-18 AAL655 JFK → MIA Jul 18, 10:10 UTCJul 18, 12:35 UTC2h 25m
2026-07-17 AAL1421 - Jul 17, 22:20 UTCJul 18, 00:19 UTC2h 0m
2026-07-17 AAL1421 ORD → JFK Jul 17, 22:16 UTCJul 18, 00:15 UTC1h 59m
2026-07-17 AAL2269 - Jul 17, 17:15 UTCJul 17, 19:55 UTC2h 40m
2026-07-17 AAL2269 - Jul 17, 13:25 UTCJul 17, 15:55 UTC2h 30m
2026-07-17 AAL3185 EWR → ORD Jul 17, 09:45 UTCJul 17, 11:45 UTC2h 0m
2026-07-17 AAL2549 ORD → EWR Jul 17, 02:30 UTCJul 17, 03:59 UTC1h 30m
2026-07-16 AAL975 MBJ → ORD Jul 16, 20:14 UTCJul 17, 00:04 UTC3h 50m

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 N874NN page for operator, model, and routing details .

Mode-S AC066B frequently asked

What is Mode-S code AC066B?
AC066B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N874NN.
Where is Mode-S AC066B registered?
Mode-S code AC066B 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 AC066B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC066B, octal 53003153, decimal 11,273,835.
What flights does AC066B operate?
Mode-S AC066B has broadcast 20 distinct callsigns, including AAL2973, AAL1948, AAL975, AAL1531, AAL463.