Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACFFB7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N937AN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
ACFFB7
Octal
53177667
Decimal
11,337,655
Country
US
Tail
N937AN
Type
B738
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
522
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S ACFFB7.

Country allocation

The ICAO 24-bit address ACFFB7 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
AAL1900 American Airlines 8 2026-05-09
AAL3175 American Airlines 6 2026-05-11
AAL1090 American Airlines 6 2026-05-20
AAL2853 American Airlines 5 2026-04-26
AAL1935 - 5 2026-06-23
AAL2989 American Airlines 4 2026-05-06
AAL2664 - 4 2026-07-08
AAL2572 - 4 2026-07-07
AAL2105 American Airlines 4 2026-04-26
AAL2063 American Airlines 4 2026-05-23
AAL1888 American Airlines 4 2026-04-15
AAL1772 American Airlines 4 2026-05-25
AAL1352 American Airlines 4 2026-06-03
AAL1310 American Airlines 4 2026-05-14
AAL1294 American Airlines 4 2026-07-26
AAL1157 - 4 2026-06-30
AAL1034 American Airlines 4 2026-06-04
AAL890 American Airlines 3 2026-07-26
AAL846 American Airlines 3 2026-05-26
AAL763 American Airlines 3 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1294 PHL → PHX Jul 26, 19:45 UTCJul 26, 21:15 UTC1h 30m
2026-07-26 AAL1766 LGA → ORD Jul 26, 15:10 UTCJul 26, 18:30 UTC3h 20m
2026-07-26 AAL537 ELP → DFW Jul 26, 12:10 UTCJul 26, 13:40 UTC1h 30m
2026-07-26 AAL890 PHX → STL Jul 26, 02:07 UTCJul 26, 04:52 UTC2h 45m
2026-07-26 AAL890 PHX → STL Jul 26, 02:10 UTCJul 26, 04:55 UTC2h 45m
2026-07-25 AAL554 PHL → ORD Jul 25, 20:35 UTCJul 25, 22:25 UTC1h 50m
2026-07-25 AAL554 PHL → ORD Jul 25, 17:10 UTCJul 25, 19:15 UTC2h 5m
2026-07-25 AAL2574 STL → PHX Jul 25, 13:05 UTCJul 25, 15:45 UTC2h 40m
2026-07-24 AAL2686 CLT → GRR Jul 24, 23:15 UTCJul 25, 00:45 UTC1h 30m
2026-07-24 AAL2686 CLT → GRR Jul 24, 23:12 UTCJul 25, 00:39 UTC1h 27m
2026-07-24 AAL1294 PHL → PHX Jul 24, 19:55 UTCJul 24, 21:20 UTC1h 25m
2026-07-24 AAL1294 PHL → PHX Jul 24, 19:54 UTCJul 24, 21:19 UTC1h 25m
2026-07-24 AAL1766 LGA → ORD Jul 24, 15:05 UTCJul 24, 18:05 UTC3h 0m
2026-07-24 AAL2261 STL → DFW Jul 24, 10:35 UTCJul 24, 11:55 UTC1h 20m
2026-07-24 AAL890 PHX → STL Jul 24, 02:15 UTCJul 24, 05:00 UTC2h 45m
2026-07-23 AAL2293 BOS → ORD Jul 23, 04:50 UTCJul 23, 05:50 UTC1h 0m
2026-07-23 AAL2293 BOS → ORD Jul 23, 04:48 UTCJul 23, 05:44 UTC56m
2026-07-23 AAL1437 MIA → LGA Jul 23, 00:00 UTCJul 23, 03:40 UTC3h 40m
2026-07-22 AAL1251 DFW → LBB Jul 22, 20:10 UTCJul 22, 22:05 UTC1h 55m
2026-07-22 AAL996 EZE → DFW Jul 22, 17:06 UTCJul 22, 18:31 UTC1h 25m
2026-07-22 AAL996 EZE → DFW Jul 22, 17:10 UTCJul 22, 18:40 UTC1h 30m
2026-07-22 AAL589 STL → BOS Jul 22, 13:20 UTCJul 22, 15:35 UTC2h 15m
2026-07-21 AAL3096 CLT → STL Jul 21, 11:20 UTCJul 21, 14:45 UTC3h 25m
2026-07-21 AAL3096 CLT → STL Jul 21, 11:19 UTCJul 21, 14:39 UTC3h 20m
2026-07-21 AAL808 DFW → PHL Jul 21, 02:00 UTCJul 21, 04:40 UTC2h 40m
2026-07-20 AAL9785 ECP → PHL Jul 20, 21:40 UTCJul 20, 23:55 UTC2h 14m
2026-07-20 AAL9785 ECP → PHL Jul 20, 21:40 UTCJul 20, 23:50 UTC2h 10m
2026-07-16 AAL1796 - Jul 16, 18:25 UTCJul 16, 20:00 UTC1h 35m
2026-07-16 AAL1618 DCA → DFW Jul 16, 14:15 UTCJul 16, 16:49 UTC2h 35m
2026-07-16 AAL1618 DCA → DFW Jul 16, 14:13 UTCJul 16, 16:49 UTC2h 36m
2026-07-16 AAL1618 DFW → DCA Jul 16, 10:20 UTCJul 16, 13:00 UTC2h 40m
2026-07-16 AAL1662 - Jul 16, 01:00 UTCJul 16, 03:10 UTC2h 10m
2026-07-15 AAL1662 - Jul 15, 21:50 UTCJul 16, 00:00 UTC2h 10m
2026-07-15 AAL3264 - Jul 15, 18:00 UTCJul 15, 20:10 UTC2h 10m
2026-07-13 AAL2908 - Jul 13, 15:20 UTCJul 13, 16:40 UTC1h 20m
2026-07-13 AAL2908 CLT → ORD Jul 13, 15:16 UTCJul 13, 16:39 UTC1h 23m
2026-07-13 AAL2692 - Jul 13, 12:40 UTCJul 13, 13:35 UTC55m
2026-07-13 AAL2692 BNA → CLT Jul 13, 12:38 UTCJul 13, 13:34 UTC56m
2026-07-13 AAL2833 - Jul 13, 00:35 UTCJul 13, 02:40 UTC2h 5m
2026-07-12 AAL1283 - Jul 12, 19:35 UTCJul 12, 22:50 UTC3h 15m
2026-07-12 AAL1283 POS → MIA Jul 12, 19:26 UTCJul 12, 22:50 UTC3h 24m
2026-07-12 AAL2703 - Jul 12, 14:25 UTCJul 12, 17:35 UTC3h 10m
2026-07-12 AAL2703 MIA → POS Jul 12, 14:23 UTCJul 12, 17:52 UTC3h 29m
2026-07-12 AAL1342 - Jul 12, 10:55 UTCJul 12, 12:45 UTC1h 50m
2026-07-12 AAL2833 - Jul 12, 01:15 UTCJul 12, 03:05 UTC1h 50m
2026-07-11 AAL910 - Jul 11, 22:50 UTCJul 11, 23:15 UTC25m
2026-07-11 AAL925 - Jul 11, 17:20 UTCJul 11, 17:40 UTC20m
2026-07-11 AAL925 MIA → BAQ Jul 11, 17:16 UTCJul 11, 19:30 UTC2h 14m
2026-07-11 AAL1347 - Jul 11, 12:50 UTCJul 11, 15:10 UTC2h 20m
2026-07-11 AAL1347 IAH → MIA Jul 11, 12:50 UTCJul 11, 15:10 UTC2h 20m

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 N937AN page for operator, model, and routing details .

Mode-S ACFFB7 frequently asked

What is Mode-S code ACFFB7?
ACFFB7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N937AN.
Where is Mode-S ACFFB7 registered?
Mode-S code ACFFB7 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 ACFFB7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACFFB7, octal 53177667, decimal 11,337,655.
What flights does ACFFB7 operate?
Mode-S ACFFB7 has broadcast 20 distinct callsigns, including AAL1900, AAL3175, AAL1090, AAL2853, AAL1935.