Apparatus

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sensors Mode-S transponder

A9741D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N708UW · AIRBUS A-319 · operated by UMB BANK NA TRUSTEE

Hex
A9741D
Octal
52272035
Decimal
11,105,309
Country
US
Tail
N708UW
Type
A319
Broadcasting now · callsign AAL647 · 35,000 ft
Flights observed
470
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A9741D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A9741D 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
AAL2939 - 10 2026-07-13
AAL2706 - 10 2026-07-14
AAL2705 - 10 2026-07-14
AAL414 American Airlines 9 2026-06-01
AAL308 American Airlines 9 2026-06-01
AAL2710 - 8 2026-06-27
AAL2245 American Airlines 8 2026-05-20
AAL3071 American Airlines 6 2026-06-06
AAL2436 American Airlines 6 2026-05-21
AAL1927 - 6 2026-06-15
AAL641 American Airlines 5 2026-05-20
AAL640 American Airlines 5 2026-05-20
AAL3254 American Airlines 5 2026-05-17
AAL2714 - 5 2026-07-11
AAL2589 - 5 2026-07-14
AAL2168 American Airlines 5 2026-05-28
AAL1712 American Airlines 5 2026-06-08
AAL1488 American Airlines 5 2026-05-31
AAL1246 - 5 2026-07-14
AAL838 American Airlines 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAL1400 - Jul 14, 19:45 UTCJul 14, 23:45 UTC3h 59m
2026-07-14 AAL2706 - Jul 14, 17:40 UTCJul 14, 18:15 UTC35m
2026-07-14 AAL2706 HAV → MIA Jul 14, 17:27 UTCJul 14, 18:15 UTC48m
2026-07-14 AAL2705 - Jul 14, 15:20 UTCJul 14, 15:55 UTC35m
2026-07-14 AAL2589 YYZ → MIA Jul 14, 10:20 UTCJul 14, 13:00 UTC2h 40m
2026-07-14 AAL1246 - Jul 14, 02:05 UTCJul 14, 04:50 UTC2h 45m
2026-07-13 AAL2939 - Jul 13, 22:30 UTCJul 14, 00:20 UTC1h 50m
2026-07-13 AAL2939 - Jul 13, 19:25 UTCJul 13, 21:20 UTC1h 55m
2026-07-13 AAL2706 - Jul 13, 17:35 UTCJul 13, 18:00 UTC25m
2026-07-13 AAL2705 - Jul 13, 15:25 UTCJul 13, 16:00 UTC35m
2026-07-13 AAL2778 - Jul 13, 13:25 UTCJul 13, 14:05 UTC40m
2026-07-13 AAL2778 - Jul 13, 11:15 UTCJul 13, 12:00 UTC45m
2026-07-13 AAL1572 - Jul 13, 03:40 UTCJul 13, 06:15 UTC2h 35m
2026-07-13 AAL1932 - Jul 13, 01:05 UTCJul 13, 02:25 UTC1h 20m
2026-07-12 AAL2174 - Jul 12, 22:00 UTCJul 12, 23:35 UTC1h 35m
2026-07-12 AAL2174 - Jul 12, 18:45 UTCJul 12, 20:55 UTC2h 10m
2026-07-12 AAL1295 - Jul 12, 16:15 UTCJul 12, 17:10 UTC55m
2026-07-12 AAL1605 BOS → DCA Jul 12, 13:30 UTCJul 12, 14:45 UTC1h 15m
2026-07-12 AAL1776 PHL → BOS Jul 12, 02:10 UTCJul 12, 02:55 UTC45m
2026-07-12 AAL1776 PHL → BOS Jul 12, 02:11 UTCJul 12, 02:55 UTC44m
2026-07-11 AAL2714 STL → PHL Jul 11, 23:00 UTCJul 12, 00:45 UTC1h 45m
2026-07-11 AAL2714 - Jul 11, 20:10 UTCJul 11, 22:05 UTC1h 55m
2026-07-11 AAL1117 - Jul 11, 17:35 UTCJul 11, 18:30 UTC55m
2026-07-11 AAL1117 BDA → PHL Jul 11, 16:31 UTCJul 11, 18:26 UTC1h 55m
2026-07-11 AAL825 - Jul 11, 13:35 UTCJul 11, 14:10 UTC35m
2026-07-11 AAL825 PHL → BDA Jul 11, 13:35 UTCJul 11, 15:21 UTC1h 46m
2026-07-11 AAL825 PHL → PHL Jul 11, 12:55 UTCJul 11, 13:00 UTC5m
2026-07-11 AAL1008 - Jul 11, 10:35 UTCJul 11, 11:25 UTC50m
2026-07-11 AAL1008 PVD → PHL Jul 11, 10:34 UTCJul 11, 11:24 UTC50m
2026-07-11 AAL1664 PHL → PVD Jul 11, 02:59 UTCJul 11, 03:41 UTC42m
2026-07-10 AAL2714 - Jul 10, 23:50 UTCJul 11, 01:15 UTC1h 25m
2026-07-10 AAL2714 STL → PHL Jul 10, 23:46 UTCJul 11, 01:45 UTC1h 59m
2026-07-10 AAL2714 PHL → STL Jul 10, 20:20 UTCJul 10, 22:20 UTC2h 0m
2026-07-10 AAL2365 - Jul 10, 17:50 UTCJul 10, 18:50 UTC1h 0m
2026-07-10 AAL2365 PHL → BTV Jul 10, 15:20 UTCJul 10, 16:20 UTC1h 0m
2026-07-10 AAL2847 IND → PHL Jul 10, 11:20 UTCJul 10, 12:45 UTC1h 25m
2026-07-10 AAL1247 - Jul 10, 05:50 UTCJul 10, 07:15 UTC1h 25m
2026-07-10 AAL1247 PHL → PHL Jul 10, 04:50 UTCJul 10, 04:55 UTC5m
2026-07-10 AAL1990 - Jul 10, 01:15 UTCJul 10, 03:00 UTC1h 45m
2026-07-09 AAL3317 - Jul 9, 19:05 UTCJul 9, 21:00 UTC1h 55m
2026-07-09 AAL1747 DEN → ORD Jul 9, 15:15 UTCJul 9, 17:30 UTC2h 15m
2026-07-09 AAL1747 ORD → DEN Jul 9, 11:50 UTCJul 9, 14:00 UTC2h 10m
2026-07-08 AAL3243 - Jul 8, 23:40 UTCJul 9, 01:15 UTC1h 35m
2026-07-08 AAL3243 - Jul 8, 21:20 UTCJul 8, 22:40 UTC1h 20m
2026-07-08 AAL2507 - Jul 8, 17:40 UTCJul 8, 19:30 UTC1h 50m
2026-07-08 AAL2507 ORD → SAV Jul 8, 14:45 UTCJul 8, 16:35 UTC1h 50m
2026-07-08 AAL2849 RDU → ORD Jul 8, 11:20 UTCJul 8, 12:55 UTC1h 35m
2026-07-08 AAL2083 DCA → RDU Jul 8, 02:00 UTCJul 8, 02:50 UTC50m
2026-07-07 AAL2454 MSY → PHL Jul 7, 21:45 UTCJul 7, 23:55 UTC2h 10m
2026-07-07 AAL2454 MSY → PHL Jul 7, 18:20 UTCJul 7, 20:45 UTC2h 25m

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 N708UW page for operator, model, and routing details .

Mode-S A9741D frequently asked

What is Mode-S code A9741D?
A9741D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N708UW.
Where is Mode-S A9741D registered?
Mode-S code A9741D 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 A9741D broadcasting right now?
Yes. Mode-S A9741D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9741D, octal 52272035, decimal 11,105,309.
What flights does A9741D operate?
Mode-S A9741D has broadcast 20 distinct callsigns, including AAL2939, AAL2706, AAL2705, AAL414, AAL308.