Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9FB4E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N742PS · AIRBUS A-319 · operated by BANK OF UTAH TRUSTEE

Hex
A9FB4E
Octal
52375516
Decimal
11,139,918
Country
US
Tail
N742PS
Type
A319
No current signal · last broadcast Jul 25, 23:20 UTC
Flights observed
676
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 23:20 UTC

Last known position

Most recent position reported by Mode-S A9FB4E.

Country allocation

The ICAO 24-bit address A9FB4E 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
AAL1219 American Airlines 9 2026-07-25
AAL3188 - 8 2026-07-17
AAL1501 - 8 2026-07-16
AAL804 - 7 2026-07-02
AAL3066 American Airlines 7 2026-04-27
AAL2939 American Airlines 7 2026-06-25
AAL2633 American Airlines 7 2026-05-21
AAL1826 American Airlines 7 2026-05-29
AAL1712 - 7 2026-07-17
AAL2445 American Airlines 6 2026-07-21
AAL2223 American Airlines 6 2026-06-07
AAL2092 American Airlines 6 2026-07-04
AAL1926 American Airlines 6 2026-04-24
AAL629 American Airlines 5 2026-07-06
AAL3167 American Airlines 5 2026-05-01
AAL3147 American Airlines 5 2026-04-16
AAL2831 American Airlines 5 2026-07-24
AAL2354 American Airlines 5 2026-07-19
AAL2347 - 5 2026-06-29
AAL2345 American Airlines 5 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AAL1219 IAH → ORD Jul 25, 22:55 UTCJul 25, 23:20 UTC25m
2026-07-25 AAL1219 IAH → ORD Jul 25, 21:05 UTCJul 25, 21:30 UTC25m
2026-07-25 AAL1138 IND → PHL Jul 25, 15:30 UTCJul 25, 19:35 UTC4h 5m
2026-07-25 AAL1733 DFW → MKE Jul 25, 11:50 UTCJul 25, 12:30 UTC40m
2026-07-25 AAL1700 DFW → EWR Jul 25, 01:30 UTCJul 25, 02:10 UTC40m
2026-07-24 AAL2483 BOS → AUS Jul 24, 23:15 UTCJul 24, 23:45 UTC30m
2026-07-24 AAL2481 PHL → CLT Jul 24, 20:30 UTCJul 24, 21:00 UTC30m
2026-07-24 AAL2831 LAX → PHL Jul 24, 18:15 UTCJul 24, 19:00 UTC45m
2026-07-24 AAL2831 LAX → PHL Jul 24, 16:15 UTCJul 24, 17:00 UTC45m
2026-07-24 AAL2526 RDU → PHL Jul 24, 13:15 UTCJul 24, 14:40 UTC1h 25m
2026-07-23 AAL3041 PHL → ATL Jul 23, 22:15 UTCJul 23, 23:55 UTC1h 40m
2026-07-23 AAL3041 PHL → ATL Jul 23, 22:14 UTCJul 23, 23:55 UTC1h 41m
2026-07-23 AAL621 ATL → PHL Jul 23, 18:50 UTCJul 23, 20:20 UTC1h 30m
2026-07-23 AAL621 - Jul 23, 15:50 UTCJul 23, 17:30 UTC1h 40m
2026-07-23 AAL1015 SAN → MIA Jul 23, 11:20 UTCJul 23, 13:40 UTC2h 20m
2026-07-22 AAL1872 EWR → ORD Jul 22, 23:05 UTCJul 23, 01:35 UTC2h 30m
2026-07-22 AAL1323 - Jul 22, 18:15 UTCJul 22, 20:20 UTC2h 5m
2026-07-22 AAL3051 - Jul 22, 15:15 UTCJul 22, 16:30 UTC1h 15m
2026-07-22 AAL709 JAX → PHL Jul 22, 11:10 UTCJul 22, 12:55 UTC1h 45m
2026-07-22 AAL2940 PHX → PHL Jul 22, 04:40 UTCJul 22, 05:25 UTC45m
2026-07-21 AAL2445 BOS → MIA Jul 21, 16:35 UTCJul 21, 18:50 UTC2h 15m
2026-07-21 AAL2445 BOS → MIA Jul 21, 16:31 UTCJul 21, 18:47 UTC2h 16m
2026-07-21 AAL2445 BOS → MIA Jul 21, 12:45 UTCJul 21, 15:00 UTC2h 15m
2026-07-21 AAL1147 - Jul 21, 00:25 UTCJul 21, 01:20 UTC55m
2026-07-21 AAL1147 BOS → PHL Jul 21, 00:24 UTCJul 21, 01:20 UTC56m
2026-07-20 AAL1776 PHL → BOS Jul 20, 21:50 UTCJul 20, 22:55 UTC1h 5m
2026-07-20 AAL3130 MSY → DCA Jul 20, 18:40 UTCJul 20, 20:30 UTC1h 50m
2026-07-20 AAL1650 DCA → PVD Jul 20, 16:35 UTCJul 20, 17:35 UTC1h 0m
2026-07-20 AAL1650 DCA → PVD Jul 20, 16:32 UTCJul 20, 17:33 UTC1h 1m
2026-07-20 AAL2324 PHL → ORD Jul 20, 11:00 UTCJul 20, 13:24 UTC2h 24m
2026-07-20 AAL2324 PHL → ORD Jul 20, 11:05 UTCJul 20, 13:25 UTC2h 20m
2026-07-20 AAL340 LAX → MIA Jul 20, 02:45 UTCJul 20, 04:45 UTC2h 0m
2026-07-19 AAL470 DFW → PHL Jul 19, 22:50 UTCJul 20, 00:45 UTC1h 55m
2026-07-19 AAL2354 RSW → ORD Jul 19, 19:40 UTCJul 19, 20:50 UTC1h 10m
2026-07-19 AAL2354 RSW → ORD Jul 19, 17:15 UTCJul 19, 18:10 UTC55m
2026-07-19 AAL2865 PUJ → PHL Jul 19, 14:00 UTCJul 19, 15:45 UTC1h 45m
2026-07-18 AAL2816 LGA → ORD Jul 18, 20:40 UTCJul 18, 22:10 UTC1h 30m
2026-07-18 AAL2816 LGA → ORD Jul 18, 20:37 UTCJul 18, 22:12 UTC1h 35m
2026-07-18 AAL949 - Jul 18, 15:55 UTCJul 18, 17:25 UTC1h 30m
2026-07-18 AAL2395 LGA → RDU Jul 18, 13:55 UTCJul 18, 14:45 UTC50m
2026-07-18 AAL2730 - Jul 18, 10:25 UTCJul 18, 12:30 UTC2h 5m
2026-07-18 AAL2716 - Jul 18, 04:40 UTCJul 18, 06:15 UTC1h 35m
2026-07-18 AAL2716 MIA → TYS Jul 18, 04:37 UTCJul 18, 06:15 UTC1h 38m
2026-07-17 AAL3071 ORD → MCO Jul 17, 20:50 UTCJul 18, 01:54 UTC5h 5m
2026-07-17 AAL1712 MCO → MIA Jul 17, 16:44 UTCJul 17, 17:25 UTC40m
2026-07-17 AAL1712 - Jul 17, 13:40 UTCJul 17, 14:15 UTC35m
2026-07-17 AAL1740 PHX → PHL Jul 17, 11:35 UTCJul 17, 12:15 UTC40m
2026-07-17 AAL3188 - Jul 17, 02:25 UTCJul 17, 02:59 UTC35m
2026-07-17 AAL3188 MIA → TPA Jul 17, 02:23 UTCJul 17, 02:59 UTC36m
2026-07-16 AAL1501 - Jul 16, 22:49 UTCJul 17, 00:45 UTC1h 55m

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 N742PS page for operator, model, and routing details .

Mode-S A9FB4E frequently asked

What is Mode-S code A9FB4E?
A9FB4E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N742PS.
Where is Mode-S A9FB4E registered?
Mode-S code A9FB4E 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 A9FB4E broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 23:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9FB4E, octal 52375516, decimal 11,139,918.
What flights does A9FB4E operate?
Mode-S A9FB4E has broadcast 20 distinct callsigns, including AAL1219, AAL3188, AAL1501, AAL804, AAL3066.