Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC71DD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9002U · AIRBUS A-319 · operated by AMERICAN AIRLINES INC

Hex
AC71DD
Octal
53070735
Decimal
11,301,341
Country
US
Tail
N9002U
Type
A319
Broadcasting now · callsign AAL1923 · 33,975 ft
Flights observed
568
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

AC71DD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC71DD 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
AAL2312 American Airlines 14 2026-07-22
AAL2779 - 11 2026-07-07
AAL2753 American Airlines 10 2026-05-09
AAL616 - 8 2026-07-07
AAL2781 - 8 2026-06-29
AAL2092 American Airlines 8 2026-07-03
AAL1319 - 8 2026-06-29
AAL499 - 7 2026-07-12
AAL3129 American Airlines 7 2026-07-25
AAL1712 - 7 2026-07-03
AAL838 - 6 2026-07-01
AAL373 American Airlines 6 2026-05-09
AAL359 American Airlines 6 2026-05-09
AAL3222 American Airlines 6 2026-05-08
AAL2798 - 6 2026-07-03
AAL2737 - 6 2026-06-23
AAL2096 American Airlines 6 2026-05-12
AAL2058 American Airlines 6 2026-05-05
AAL1488 - 6 2026-06-26
AAL1396 - 6 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1961 SAT → DFW Jul 26, 13:55 UTCJul 26, 21:15 UTC7h 20m
2026-07-25 AAL3120 MSP → ORD Jul 25, 22:00 UTCJul 25, 23:25 UTC1h 25m
2026-07-25 AAL3120 MSP → ORD Jul 25, 21:55 UTCJul 25, 23:21 UTC1h 26m
2026-07-25 AAL3129 MSY → PHL Jul 25, 01:20 UTCJul 25, 20:35 UTC19h 15m
2026-07-24 AAL3129 MSY → PHL Jul 24, 23:55 UTCJul 25, 20:35 UTC20h 40m
2026-07-24 AAL1799 LAX → PHL Jul 24, 20:50 UTCJul 24, 22:20 UTC1h 30m
2026-07-24 AAL1799 LAX → PHL Jul 24, 17:55 UTCJul 24, 19:30 UTC1h 35m
2026-07-24 AAL3024 ORD → SJD Jul 24, 14:05 UTCJul 24, 15:40 UTC1h 35m
2026-07-23 AAL3025 CLT → TVC Jul 23, 22:40 UTCJul 24, 00:20 UTC1h 40m
2026-07-23 AAL305 MIA → SEA Jul 23, 18:45 UTCJul 23, 21:05 UTC2h 20m
2026-07-23 AAL1898 PHL → EYW Jul 23, 14:45 UTCJul 23, 17:30 UTC2h 45m
2026-07-23 AAL2335 ABQ → DFW Jul 23, 12:45 UTCJul 23, 13:35 UTC50m
2026-07-22 AAL347 PUJ → MIA Jul 22, 23:40 UTCJul 23, 00:25 UTC45m
2026-07-22 AAL2312 DCA → LGA Jul 22, 21:30 UTCJul 22, 22:15 UTC45m
2026-07-22 AAL2312 DCA → LGA Jul 22, 19:40 UTCJul 22, 20:25 UTC45m
2026-07-22 AAL2944 - Jul 22, 17:15 UTCJul 22, 17:55 UTC40m
2026-07-22 AAL2944 - Jul 22, 14:45 UTCJul 22, 15:30 UTC45m
2026-07-21 AAL869 EWR → CLT Jul 21, 19:00 UTCJul 21, 21:45 UTC2h 45m
2026-07-21 AAL868 OKC → DFW Jul 21, 15:17 UTCJul 21, 18:02 UTC2h 45m
2026-07-21 AAL868 OKC → DFW Jul 21, 15:20 UTCJul 21, 18:00 UTC2h 40m
2026-07-21 AAL3147 LAX → ELP Jul 21, 01:05 UTCJul 21, 04:00 UTC2h 55m
2026-07-21 AAL3147 LAX → ELP Jul 21, 00:55 UTCJul 21, 03:59 UTC3h 4m
2026-07-20 AAL1814 DFW → PHL Jul 20, 21:00 UTCJul 20, 23:35 UTC2h 35m
2026-07-20 AAL2122 BOS → DCA Jul 20, 16:15 UTCJul 20, 17:25 UTC1h 10m
2026-07-20 AAL2122 BOS → DCA Jul 20, 16:10 UTCJul 20, 17:27 UTC1h 17m
2026-07-20 AAL2122 BOS → DCA Jul 20, 13:35 UTCJul 20, 14:40 UTC1h 5m
2026-07-20 AAL1251 MSP → DFW Jul 20, 10:10 UTCJul 20, 12:11 UTC2h 1m
2026-07-20 AAL1251 MSP → DFW Jul 20, 10:10 UTCJul 20, 12:10 UTC2h 0m
2026-07-20 AAL2978 PHL → PIT Jul 20, 01:50 UTCJul 20, 03:45 UTC1h 55m
2026-07-20 AAL2978 PHL → PIT Jul 20, 01:48 UTCJul 20, 03:45 UTC1h 57m
2026-07-19 AAL1878 - Jul 19, 23:00 UTCJul 20, 00:40 UTC1h 40m
2026-07-19 AAL1878 DFW → FSD Jul 19, 20:15 UTCJul 19, 21:55 UTC1h 40m
2026-07-19 AAL2122 BOS → DCA Jul 19, 16:50 UTCJul 19, 18:00 UTC1h 10m
2026-07-19 AAL2122 BOS → DCA Jul 19, 14:50 UTCJul 19, 15:45 UTC55m
2026-07-17 AAL883 - Jul 17, 22:40 UTCJul 18, 00:45 UTC2h 5m
2026-07-17 AAL1970 - Jul 17, 18:44 UTCJul 17, 20:55 UTC2h 10m
2026-07-17 AAL2675 - Jul 17, 13:35 UTCJul 17, 16:59 UTC3h 25m
2026-07-17 AAL2675 TUS → ORD Jul 17, 13:32 UTCJul 17, 16:41 UTC3h 9m
2026-07-17 AAL2661 - Jul 17, 05:39 UTCJul 17, 08:40 UTC3h 0m
2026-07-17 AAL2661 ORD → TUS Jul 17, 05:38 UTCJul 17, 08:36 UTC2h 58m
2026-07-17 AAL3282 - Jul 17, 01:59 UTCJul 17, 04:04 UTC2h 5m
2026-07-16 AAL1970 - Jul 16, 18:40 UTCJul 16, 20:55 UTC2h 15m
2026-07-16 AAL1970 ORD → JAC Jul 16, 18:39 UTCJul 16, 21:19 UTC2h 40m
2026-07-16 AAL632 SAT → ORD Jul 16, 11:30 UTCJul 16, 13:49 UTC2h 20m
2026-07-16 AAL1406 - Jul 16, 03:40 UTCJul 16, 04:25 UTC45m
2026-07-16 AAL1878 FSD → DFW Jul 16, 00:25 UTCJul 16, 02:10 UTC1h 45m
2026-07-15 AAL1878 - Jul 15, 21:00 UTCJul 15, 22:40 UTC1h 40m
2026-07-15 AAL1396 AUS → DFW Jul 15, 15:45 UTCJul 15, 16:30 UTC45m
2026-07-15 AAL1396 DFW → AUS Jul 15, 14:10 UTCJul 15, 14:45 UTC35m
2026-07-15 AAL1753 - Jul 15, 11:25 UTCJul 15, 12:10 UTC45m

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 N9002U page for operator, model, and routing details .

Mode-S AC71DD frequently asked

What is Mode-S code AC71DD?
AC71DD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9002U.
Where is Mode-S AC71DD registered?
Mode-S code AC71DD 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 AC71DD broadcasting right now?
Yes. Mode-S AC71DD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC71DD, octal 53070735, decimal 11,301,341.
What flights does AC71DD operate?
Mode-S AC71DD has broadcast 20 distinct callsigns, including AAL2312, AAL2779, AAL2753, AAL616, AAL2781.