Apparatus

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sensors Mode-S transponder

A77F2D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N582UW · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A77F2D
Octal
51677455
Decimal
10,977,069
Country
US
Tail
N582UW
Type
A321
Broadcasting now · callsign AAL9798 · 37,975 ft
Flights observed
535
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

A77F2D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A77F2D 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
AAL2461 - 8 2026-07-07
AAL611 American Airlines 6 2026-06-25
AAL1385 American Airlines 6 2026-07-17
AAL783 American Airlines 5 2026-06-13
AAL3156 - 5 2026-07-04
AAL2775 American Airlines 5 2026-05-14
AAL1888 American Airlines 5 2026-05-04
AAL1863 American Airlines 5 2026-07-01
AAL3273 American Airlines 4 2026-05-05
AAL3182 - 4 2026-06-27
AAL2394 - 4 2026-06-29
AAL2301 American Airlines 4 2026-04-17
AAL2276 American Airlines 4 2026-06-07
AAL2103 American Airlines 4 2026-04-15
AAL1625 - 4 2026-07-21
AAL1577 - 4 2026-06-17
AAL970 American Airlines 3 2026-05-29
AAL514 - 3 2026-07-17
AAL3303 American Airlines 3 2026-07-21
AAL3282 American Airlines 3 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2543 BOS → DFW Jul 26, 18:55 UTCJul 26, 21:15 UTC2h 20m
2026-07-26 AAL1849 PDX → CLT Jul 26, 14:10 UTCJul 26, 17:15 UTC3h 5m
2026-07-26 AAL1849 PDX → CLT Jul 26, 14:06 UTCJul 26, 17:16 UTC3h 10m
2026-07-26 AAL2605 RDU → DFW Jul 26, 09:40 UTCJul 26, 12:15 UTC2h 35m
2026-07-26 AAL542 DFW → RDU Jul 26, 03:25 UTCJul 26, 05:35 UTC2h 10m
2026-07-25 AAL717 MUC → CLT Jul 25, 21:50 UTCJul 26, 01:15 UTC3h 25m
2026-07-25 AAL717 MUC → CLT Jul 25, 16:50 UTCJul 25, 20:15 UTC3h 25m
2026-07-25 AAL1707 CLT → EWR Jul 25, 12:45 UTCJul 25, 14:50 UTC2h 5m
2026-07-25 AAL1707 CLT → EWR Jul 25, 12:39 UTCJul 25, 14:50 UTC2h 11m
2026-07-24 AAL2715 PHL → TPA Jul 24, 12:10 UTCJul 24, 13:58 UTC1h 48m
2026-07-24 AAL2715 PHL → TPA Jul 24, 12:15 UTCJul 24, 14:05 UTC1h 50m
2026-07-23 AAL1422 DFW → CHS Jul 23, 22:50 UTCJul 24, 00:20 UTC1h 30m
2026-07-23 AAL2390 DFW → LAS Jul 23, 19:30 UTCJul 23, 20:10 UTC40m
2026-07-23 AAL2390 DFW → LAS Jul 23, 19:29 UTCJul 23, 20:09 UTC40m
2026-07-23 AAL2390 DFW → LAS Jul 23, 17:30 UTCJul 23, 17:55 UTC25m
2026-07-23 AAL1690 BDL → CLT Jul 23, 13:45 UTCJul 23, 15:45 UTC2h 0m
2026-07-23 AAL1670 PHL → DFW Jul 23, 09:20 UTCJul 23, 12:15 UTC2h 55m
2026-07-22 AAL2109 LAX → DCA Jul 22, 22:50 UTCJul 23, 00:45 UTC1h 55m
2026-07-22 AAL2109 LAX → DCA Jul 22, 22:45 UTCJul 23, 00:45 UTC2h 0m
2026-07-22 AAL1660 PHL → ORD Jul 22, 20:20 UTCJul 22, 21:20 UTC1h 0m
2026-07-22 AAL1660 PHL → ORD Jul 22, 20:15 UTCJul 22, 21:19 UTC1h 4m
2026-07-22 AAL1651 SAN → CLT Jul 22, 14:10 UTCJul 22, 18:30 UTC4h 20m
2026-07-22 AAL1651 SAN → CLT Jul 22, 14:07 UTCJul 22, 18:30 UTC4h 23m
2026-07-22 AAL2457 MIA → ORD Jul 22, 03:20 UTCJul 22, 05:25 UTC2h 5m
2026-07-21 AAL3303 CMH → PHL Jul 21, 20:50 UTCJul 22, 00:15 UTC3h 25m
2026-07-21 AAL3303 CMH → PHL Jul 21, 20:49 UTCJul 22, 00:10 UTC3h 21m
2026-07-21 AAL1625 - Jul 21, 17:20 UTCJul 21, 19:35 UTC2h 15m
2026-07-21 AAL1625 PHX → PDX Jul 21, 17:19 UTCJul 21, 19:27 UTC2h 8m
2026-07-21 AAL2015 MCO → PHX Jul 21, 11:50 UTCJul 21, 15:50 UTC4h 0m
2026-07-21 AAL364 DFW → SJC Jul 21, 01:10 UTCJul 21, 03:40 UTC2h 30m
2026-07-20 AAL1629 ORD → CLT Jul 20, 21:10 UTCJul 20, 23:40 UTC2h 30m
2026-07-20 AAL1629 ORD → CLT Jul 20, 17:15 UTCJul 20, 19:55 UTC2h 40m
2026-07-20 AAL982 DFW → ATL Jul 20, 12:20 UTCJul 20, 15:35 UTC3h 15m
2026-07-20 AAL561 YUL → GCM Jul 20, 05:10 UTCJul 20, 07:20 UTC2h 10m
2026-07-20 AAL3033 - Jul 20, 00:15 UTCJul 20, 04:00 UTC3h 45m
2026-07-19 AAL2396 SDF → DFW Jul 19, 18:10 UTCJul 19, 22:50 UTC4h 40m
2026-07-19 AAL2396 SDF → DFW Jul 19, 18:06 UTCJul 19, 22:29 UTC4h 23m
2026-07-19 AAL3237 PHL → BOS Jul 19, 13:10 UTCJul 19, 16:35 UTC3h 25m
2026-07-19 AAL2149 DCA → BOS Jul 19, 08:00 UTCJul 19, 11:40 UTC3h 40m
2026-07-19 AAL529 - Jul 19, 01:25 UTCJul 19, 05:05 UTC3h 40m
2026-07-18 AAL836 - Jul 18, 21:25 UTCJul 19, 00:05 UTC2h 40m
2026-07-18 AAL2530 PHL → TPA Jul 18, 18:15 UTCJul 18, 19:45 UTC1h 30m
2026-07-18 AAL2530 PHL → TPA Jul 18, 18:15 UTCJul 18, 19:38 UTC1h 23m
2026-07-18 AAL1059 DFW → ORD Jul 18, 13:45 UTCJul 18, 15:40 UTC1h 55m
2026-07-18 AAL2228 - Jul 18, 07:55 UTCJul 18, 10:55 UTC3h 0m
2026-07-18 AAL2228 - Jul 18, 03:15 UTCJul 18, 06:20 UTC3h 5m
2026-07-17 AAL1385 PHL → PHX Jul 17, 22:55 UTCJul 18, 00:19 UTC1h 25m
2026-07-17 AAL1385 PHL → PHX Jul 17, 21:55 UTCJul 18, 00:17 UTC2h 22m
2026-07-17 AAL1385 PHL → PHX Jul 17, 18:25 UTCJul 17, 19:40 UTC1h 15m
2026-07-17 AAL1385 PHL → PHX Jul 17, 18:22 UTCJul 17, 20:50 UTC2h 28m

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 N582UW page for operator, model, and routing details .

Mode-S A77F2D frequently asked

What is Mode-S code A77F2D?
A77F2D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N582UW.
Where is Mode-S A77F2D registered?
Mode-S code A77F2D 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 A77F2D broadcasting right now?
Yes. Mode-S A77F2D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A77F2D, octal 51677455, decimal 10,977,069.
What flights does A77F2D operate?
Mode-S A77F2D has broadcast 20 distinct callsigns, including AAL2461, AAL611, AAL1385, AAL783, AAL3156.