Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9F818

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N741UW · AIRBUS A-319 · operated by BANK OF UTAH TRUSTEE

Hex
A9F818
Octal
52374030
Decimal
11,139,096
Country
US
Tail
N741UW
Type
A319
No current signal · last broadcast 2h ago
Flights observed
445
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A9F818.

Country allocation

The ICAO 24-bit address A9F818 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
AAL2448 American Airlines 8 2026-05-30
AAL1867 - 8 2026-07-10
AAL2159 - 7 2026-07-03
AAL2816 - 6 2026-06-16
AAL2226 - 6 2026-07-05
AAL3173 American Airlines 5 2026-04-27
AAL3076 American Airlines 5 2026-05-03
AAL2929 - 5 2026-07-09
AAL2683 American Airlines 5 2026-05-02
AAL2625 American Airlines 5 2026-07-05
AAL2512 American Airlines 5 2026-07-04
AAL1409 American Airlines 5 2026-05-04
AAL339 American Airlines 4 2026-05-04
AAL3250 American Airlines 4 2026-05-13
AAL3077 - 4 2026-07-08
AAL2932 American Airlines 4 2026-05-30
AAL2905 - 4 2026-07-02
AAL2757 American Airlines 4 2026-04-28
AAL2697 American Airlines 4 2026-05-04
AAL2691 American Airlines 4 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AAL470 PHL → ORD Jul 13, 22:15 UTCJul 13, 23:50 UTC1h 35m
2026-07-13 AAL3043 PHL → PHL Jul 13, 20:15 UTCJul 13, 20:20 UTC5m
2026-07-13 AAL3043 BOS → PHL Jul 13, 19:15 UTCJul 13, 20:10 UTC55m
2026-07-13 AAL1582 DCA → BOS Jul 13, 16:52 UTCJul 13, 17:59 UTC1h 7m
2026-07-13 AAL1582 DCA → BOS Jul 13, 16:55 UTCJul 13, 18:00 UTC1h 5m
2026-07-13 AAL1977 - Jul 13, 12:20 UTCJul 13, 13:20 UTC1h 0m
2026-07-13 AAL1977 CLT → DCA Jul 13, 12:15 UTCJul 13, 13:15 UTC1h 0m
2026-07-13 AAL1140 - Jul 13, 01:25 UTCJul 13, 02:20 UTC55m
2026-07-12 AAL3263 - Jul 12, 23:25 UTCJul 13, 00:25 UTC1h 0m
2026-07-12 AAL2717 - Jul 12, 17:40 UTCJul 12, 19:05 UTC1h 25m
2026-07-12 AAL2717 STL → CLT Jul 12, 17:37 UTCJul 12, 19:06 UTC1h 29m
2026-07-12 AAL2717 - Jul 12, 15:10 UTCJul 12, 16:35 UTC1h 25m
2026-07-12 AAL1004 - Jul 12, 10:15 UTCJul 12, 11:40 UTC1h 25m
2026-07-12 AAL1004 ORD → STL Jul 12, 05:40 UTCJul 12, 06:20 UTC40m
2026-07-12 AAL1004 ORD → STL Jul 12, 05:40 UTCJul 12, 06:31 UTC51m
2026-07-12 AAL1372 ATL → ORD Jul 12, 02:05 UTCJul 12, 03:40 UTC1h 35m
2026-07-11 AAL2983 - Jul 11, 23:25 UTCJul 12, 01:00 UTC1h 35m
2026-07-11 AAL2983 PHL → PHL Jul 11, 23:00 UTCJul 11, 23:05 UTC5m
2026-07-11 AAL2403 - Jul 11, 17:35 UTCJul 11, 18:40 UTC1h 5m
2026-07-11 AAL2403 - Jul 11, 15:45 UTCJul 11, 16:35 UTC50m
2026-07-10 AAL1423 AUS → PHL Jul 10, 19:15 UTCJul 10, 22:35 UTC3h 20m
2026-07-10 AAL1394 - Jul 10, 16:05 UTCJul 10, 18:00 UTC1h 55m
2026-07-10 AAL1867 SMF → PHX Jul 10, 13:07 UTCJul 10, 14:35 UTC1h 28m
2026-07-10 AAL1867 SMF → PHX Jul 10, 13:10 UTCJul 10, 14:35 UTC1h 25m
2026-07-10 AAL2048 PHX → SMF Jul 10, 04:03 UTCJul 10, 05:40 UTC1h 37m
2026-07-10 AAL2048 PHX → SMF Jul 10, 04:05 UTCJul 10, 05:40 UTC1h 35m
2026-07-09 AAL2191 MSY → PHX Jul 9, 23:40 UTCJul 10, 02:30 UTC2h 50m
2026-07-09 AAL2191 MSY → PHX Jul 9, 23:39 UTCJul 10, 02:27 UTC2h 48m
2026-07-09 AAL2191 PHX → MSY Jul 9, 19:35 UTCJul 9, 22:15 UTC2h 40m
2026-07-09 AAL1668 - Jul 9, 17:15 UTCJul 9, 18:15 UTC1h 0m
2026-07-09 AAL1668 - Jul 9, 14:45 UTCJul 9, 15:45 UTC1h 0m
2026-07-09 AAL1795 - Jul 9, 10:45 UTCJul 9, 13:20 UTC2h 35m
2026-07-09 AAL568 PHX → DSM Jul 9, 02:15 UTCJul 9, 04:40 UTC2h 25m
2026-07-09 AAL568 PHX → DSM Jul 9, 02:12 UTCJul 9, 04:40 UTC2h 28m
2026-07-09 AAL2929 - Jul 9, 00:30 UTCJul 9, 01:15 UTC45m
2026-07-09 AAL2929 PSP → PHX Jul 9, 00:24 UTCJul 9, 01:10 UTC46m
2026-07-08 AAL2929 - Jul 8, 22:35 UTCJul 8, 23:05 UTC30m
2026-07-08 AAL3077 SBP → PHX Jul 8, 20:05 UTCJul 8, 21:25 UTC1h 20m
2026-07-08 AAL3077 - Jul 8, 17:45 UTCJul 8, 18:55 UTC1h 10m
2026-07-08 AAL1867 SMF → PHX Jul 8, 15:15 UTCJul 8, 16:45 UTC1h 30m
2026-07-08 AAL2048 PHX → SMF Jul 8, 03:55 UTCJul 8, 05:30 UTC1h 35m
2026-07-08 AAL2048 PHX → SMF Jul 8, 03:55 UTCJul 8, 05:28 UTC1h 33m
2026-07-08 AAL2576 LGA → RDU Jul 8, 01:15 UTCJul 8, 02:45 UTC1h 30m
2026-07-07 AAL2576 LGA → RDU Jul 7, 23:00 UTCJul 8, 00:30 UTC1h 30m
2026-07-07 AAL1348 - Jul 7, 17:45 UTCJul 7, 18:40 UTC55m
2026-07-07 AAL1348 - Jul 7, 15:50 UTCJul 7, 16:45 UTC55m
2026-07-07 AAL3184 BFL → PHX Jul 7, 13:10 UTCJul 7, 14:10 UTC1h 0m
2026-07-07 AAL1456 PHX → BFL Jul 7, 03:50 UTCJul 7, 04:55 UTC1h 5m
2026-07-07 AAL2929 PSP → PHX Jul 7, 00:05 UTCJul 7, 00:51 UTC46m
2026-07-06 AAL2929 - Jul 6, 22:35 UTCJul 6, 23:05 UTC30m

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 N741UW page for operator, model, and routing details .

Mode-S A9F818 frequently asked

What is Mode-S code A9F818?
A9F818 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N741UW.
Where is Mode-S A9F818 registered?
Mode-S code A9F818 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 A9F818 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9F818, octal 52374030, decimal 11,139,096.
What flights does A9F818 operate?
Mode-S A9F818 has broadcast 20 distinct callsigns, including AAL2448, AAL1867, AAL2159, AAL2816, AAL2226.