Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4DD65

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N412UW · AIRBUS A-321neo · operated by AMERICAN AIRLINES INC

Hex
A4DD65
Octal
51156545
Decimal
10,804,581
Country
US
Tail
N412UW
Type
A21N
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
504
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S A4DD65.

Country allocation

The ICAO 24-bit address A4DD65 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
AAL694 - 10 2026-07-13
AAL297 - 9 2026-07-13
AAL2655 American Airlines 8 2026-07-24
AAL767 American Airlines 7 2026-05-18
AAL663 American Airlines 6 2026-06-10
AAL3161 American Airlines 6 2026-05-03
AAL2820 - 6 2026-07-18
AAL2663 - 6 2026-07-15
AAL1330 American Airlines 6 2026-07-25
AAL1205 American Airlines 6 2026-06-20
AAL58 American Airlines 5 2026-06-11
AAL3252 American Airlines 5 2026-07-20
AAL266 - 5 2026-07-17
AAL2368 American Airlines 5 2026-07-25
AAL1878 American Airlines 5 2026-05-16
AAL1528 - 5 2026-07-15
AAL119 - 5 2026-07-17
AAL824 American Airlines 4 2026-06-12
AAL697 American Airlines 4 2026-06-02
AAL693 - 4 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1589 DFW → AUS Jul 26, 17:55 UTCJul 26, 20:45 UTC2h 50m
2026-07-26 AAL1589 DFW → AUS Jul 26, 13:35 UTCJul 26, 16:20 UTC2h 45m
2026-07-26 AAL2823 BOS → DFW Jul 26, 02:25 UTCJul 26, 04:50 UTC2h 25m
2026-07-25 AAL2823 BOS → DFW Jul 25, 21:30 UTCJul 25, 23:55 UTC2h 25m
2026-07-25 AAL1102 MIA → SFO Jul 25, 18:15 UTCJul 25, 19:45 UTC1h 30m
2026-07-25 AAL1157 MIA → CUN Jul 25, 15:35 UTCJul 25, 17:00 UTC1h 25m
2026-07-25 AAL1157 MIA → CUN Jul 25, 15:33 UTCJul 25, 17:03 UTC1h 30m
2026-07-25 AAL770 CLT → MIA Jul 25, 11:55 UTCJul 25, 13:25 UTC1h 30m
2026-07-25 AAL1330 MIA → PHL Jul 25, 06:35 UTCJul 25, 10:05 UTC3h 30m
2026-07-25 AAL1330 MIA → PHL Jul 25, 06:33 UTCJul 25, 10:05 UTC3h 32m
2026-07-25 AAL1362 BNA → ORD Jul 25, 02:45 UTCJul 25, 03:45 UTC1h 0m
2026-07-25 AAL2368 BWI → DFW Jul 25, 00:10 UTCJul 25, 01:05 UTC55m
2026-07-24 AAL2655 PDX → DFW Jul 24, 22:00 UTCJul 24, 22:55 UTC55m
2026-07-24 AAL2655 PDX → DFW Jul 24, 19:30 UTCJul 24, 20:20 UTC50m
2026-07-24 AAL664 LAS → PHL Jul 24, 07:53 UTCJul 24, 13:05 UTC5h 12m
2026-07-24 AAL664 LAS → PHL Jul 24, 07:53 UTCJul 24, 13:20 UTC5h 27m
2026-07-24 AAL664 LAS → PHL Jul 24, 07:55 UTCJul 24, 08:05 UTC10m
2026-07-24 AAL59 LAX → KOA Jul 24, 02:25 UTCJul 24, 02:30 UTC5m
2026-07-23 AAL59 LAX → KOA Jul 23, 21:20 UTCJul 23, 21:45 UTC25m
2026-07-23 AAL59 LAX → KOA Jul 23, 21:18 UTCJul 24, 02:25 UTC5h 7m
2026-07-23 AAL500 SFO → PHL Jul 23, 16:35 UTCJul 23, 19:15 UTC2h 40m
2026-07-23 AAL395 SAN → PHL Jul 23, 04:18 UTCJul 23, 10:36 UTC6h 18m
2026-07-22 AAL2669 PHX → EWR Jul 22, 20:40 UTCJul 22, 23:15 UTC2h 35m
2026-07-22 AAL2669 PHX → EWR Jul 22, 16:20 UTCJul 22, 18:55 UTC2h 35m
2026-07-22 AAL2555 PHX → SFO Jul 22, 11:20 UTCJul 22, 14:50 UTC3h 30m
2026-07-22 AAL1538 MSN → DFW Jul 22, 01:30 UTCJul 22, 04:20 UTC2h 50m
2026-07-21 AAL1436 - Jul 21, 13:45 UTCJul 21, 15:10 UTC1h 25m
2026-07-21 AAL2670 FLL → CLT Jul 21, 10:20 UTCJul 21, 11:20 UTC1h 0m
2026-07-21 AAL2251 DFW → BWI Jul 21, 01:05 UTCJul 21, 03:45 UTC2h 40m
2026-07-21 AAL2251 DFW → BWI Jul 21, 01:02 UTCJul 21, 03:43 UTC2h 41m
2026-07-20 AAL2815 - Jul 20, 20:55 UTCJul 20, 23:05 UTC2h 10m
2026-07-20 AAL381 - Jul 20, 15:05 UTCJul 20, 19:10 UTC4h 5m
2026-07-20 AAL381 SEA → CLT Jul 20, 15:03 UTCJul 20, 19:10 UTC4h 7m
2026-07-20 AAL3252 MIA → SEA Jul 20, 01:00 UTCJul 20, 06:15 UTC5h 15m
2026-07-20 AAL3252 MIA → SEA Jul 20, 00:55 UTCJul 20, 06:14 UTC5h 19m
2026-07-19 AAL1162 BOS → PHL Jul 19, 19:40 UTCJul 19, 22:45 UTC3h 5m
2026-07-19 AAL1162 BOS → PHL Jul 19, 19:32 UTCJul 19, 22:40 UTC3h 8m
2026-07-19 AAL1546 GND → MIA Jul 19, 15:05 UTCJul 19, 17:20 UTC2h 15m
2026-07-18 AAL1983 MIA → PHX Jul 18, 20:15 UTCJul 19, 00:10 UTC3h 55m
2026-07-18 AAL2820 PSQ → PHX Jul 18, 14:25 UTCJul 18, 18:50 UTC4h 25m
2026-07-18 AAL2820 PHL → PHX Jul 18, 14:25 UTCJul 18, 18:54 UTC4h 29m
2026-07-18 AAL2820 PHL → PHL Jul 18, 14:05 UTCJul 18, 14:10 UTC5m
2026-07-18 AAL2820 PHL → PHL Jul 18, 13:40 UTCJul 18, 13:45 UTC5m
2026-07-18 AAL2820 PHL → PHL Jul 18, 13:20 UTCJul 18, 13:25 UTC5m
2026-07-18 AAL2820 PHL → PHL Jul 18, 12:40 UTCJul 18, 12:45 UTC5m
2026-07-18 AAL2758 SAN → PHL Jul 18, 07:00 UTCJul 18, 12:10 UTC5h 10m
2026-07-17 AAL266 - Jul 17, 23:55 UTCJul 18, 04:55 UTC5h 1m
2026-07-17 AAL119 - Jul 17, 16:10 UTCJul 17, 21:25 UTC5h 15m
2026-07-16 AAL778 - Jul 16, 18:40 UTCJul 16, 23:29 UTC4h 50m
2026-07-16 AAL2405 - Jul 16, 15:25 UTCJul 16, 17:00 UTC1h 35m

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 N412UW page for operator, model, and routing details .

Mode-S A4DD65 frequently asked

What is Mode-S code A4DD65?
A4DD65 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N412UW.
Where is Mode-S A4DD65 registered?
Mode-S code A4DD65 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 A4DD65 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4DD65, octal 51156545, decimal 10,804,581.
What flights does A4DD65 operate?
Mode-S A4DD65 has broadcast 20 distinct callsigns, including AAL694, AAL297, AAL2655, AAL767, AAL663.