Apparatus

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sensors Mode-S transponder

AD9F7F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N977UY · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
AD9F7F
Octal
53317577
Decimal
11,378,559
Country
US
Tail
N977UY
Type
A321
No current signal · last broadcast Jul 26, 02:15 UTC
Flights observed
510
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 02:15 UTC

Last known position

Most recent position reported by Mode-S AD9F7F.

Country allocation

The ICAO 24-bit address AD9F7F 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
AAL2065 - 10 2026-07-19
AAL3225 - 9 2026-07-18
AAL1949 American Airlines 8 2026-04-26
AAL3224 American Airlines 6 2026-04-19
AAL1475 - 6 2026-07-05
AAL2988 American Airlines 5 2026-05-27
AAL2945 American Airlines 5 2026-07-22
AAL2500 - 5 2026-07-17
AAL2264 American Airlines 5 2026-05-07
AAL1820 American Airlines 5 2026-04-13
AAL559 - 4 2026-06-21
AAL3276 American Airlines 4 2026-05-07
AAL3001 American Airlines 4 2026-07-23
AAL2875 American Airlines 4 2026-04-17
AAL2673 American Airlines 4 2026-04-13
AAL2100 - 4 2026-07-01
AAL1597 American Airlines 4 2026-07-25
AAL1415 American Airlines 4 2026-07-24
AAL993 American Airlines 3 2026-06-11
AAL886 - 3 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AAL1595 AUS → DFW Jul 25, 22:35 UTCJul 26, 02:05 UTC3h 30m
2026-07-25 AAL1595 AUS → DFW Jul 25, 17:40 UTCJul 25, 20:55 UTC3h 15m
2026-07-25 AAL1597 LGA → DFW Jul 25, 12:55 UTCJul 25, 16:00 UTC3h 5m
2026-07-25 AAL2708 DFW → LGA Jul 25, 00:30 UTCJul 25, 03:25 UTC2h 55m
2026-07-24 AAL1415 YVR → DFW Jul 24, 19:00 UTCJul 24, 22:25 UTC3h 25m
2026-07-24 AAL1415 YVR → DFW Jul 24, 13:40 UTCJul 24, 17:25 UTC3h 45m
2026-07-24 AAL2343 ORD → SAN Jul 24, 03:25 UTCJul 24, 05:45 UTC2h 20m
2026-07-24 AAL2343 ORD → SAN Jul 24, 03:22 UTCJul 24, 05:39 UTC2h 17m
2026-07-23 AAL716 CLT → MUC Jul 23, 23:25 UTCJul 24, 01:50 UTC2h 25m
2026-07-23 AAL716 CLT → MUC Jul 23, 19:35 UTCJul 23, 22:05 UTC2h 30m
2026-07-23 AAL716 CLT → MUC Jul 23, 19:31 UTCJul 23, 22:04 UTC2h 33m
2026-07-23 AAL3001 SDF → CLT Jul 23, 17:35 UTCJul 23, 18:10 UTC35m
2026-07-23 AAL3001 SDF → CLT Jul 23, 15:55 UTCJul 23, 16:10 UTC15m
2026-07-23 AAL3001 SDF → CLT Jul 23, 13:35 UTCJul 23, 13:50 UTC15m
2026-07-23 AAL3001 SDF → CLT Jul 23, 11:35 UTCJul 23, 11:55 UTC20m
2026-07-23 AAL1174 DFW → GDL Jul 23, 00:15 UTCJul 23, 02:55 UTC2h 40m
2026-07-22 AAL642 EWR → ORD Jul 22, 19:50 UTCJul 22, 22:15 UTC2h 25m
2026-07-22 AAL2945 BOS → ORD Jul 22, 15:36 UTCJul 22, 18:25 UTC2h 49m
2026-07-22 AAL2945 BOS → ORD Jul 22, 15:40 UTCJul 22, 18:25 UTC2h 45m
2026-07-22 AAL3205 LGA → ORD Jul 22, 11:15 UTCJul 22, 13:35 UTC2h 20m
2026-07-21 AAL2634 LAX → PHL Jul 21, 23:25 UTCJul 22, 02:50 UTC3h 25m
2026-07-21 AAL2634 LAX → PHL Jul 21, 19:10 UTCJul 21, 22:05 UTC2h 55m
2026-07-21 AAL1021 BUF → DFW Jul 21, 14:35 UTCJul 21, 17:30 UTC2h 55m
2026-07-21 AAL509 LGA → RDU Jul 21, 04:15 UTCJul 21, 07:10 UTC2h 55m
2026-07-20 AAL1663 PHX → DFW Jul 20, 23:35 UTCJul 21, 01:40 UTC2h 5m
2026-07-20 AAL3203 ORD → FLL Jul 20, 18:05 UTCJul 20, 22:20 UTC4h 15m
2026-07-20 AAL2783 PHL → AUS Jul 20, 15:45 UTCJul 20, 16:50 UTC1h 5m
2026-07-20 AAL2783 PHL → AUS Jul 20, 15:44 UTCJul 20, 16:45 UTC1h 1m
2026-07-20 AAL2783 PHL → AUS Jul 20, 13:30 UTCJul 20, 14:25 UTC55m
2026-07-20 AAL2522 SEA → PHL Jul 20, 07:30 UTCJul 20, 11:50 UTC4h 20m
2026-07-19 AAL2522 PHL → SEA Jul 19, 23:40 UTCJul 20, 05:05 UTC5h 25m
2026-07-19 AAL2522 PHL → PHL Jul 19, 22:25 UTCJul 19, 22:30 UTC5m
2026-07-19 AAL2125 LGA → DCA Jul 19, 19:10 UTCJul 19, 21:10 UTC2h 0m
2026-07-19 AAL2125 LGA → DCA Jul 19, 15:20 UTCJul 19, 17:15 UTC1h 55m
2026-07-19 AAL2065 PHL → PHL Jul 19, 03:55 UTCJul 19, 04:00 UTC5m
2026-07-19 AAL2065 - Jul 19, 03:30 UTCJul 19, 03:45 UTC15m
2026-07-19 AAL2065 MCO → PHL Jul 19, 00:05 UTCJul 19, 02:00 UTC1h 55m
2026-07-19 AAL2065 MCO → PHL Jul 19, 00:03 UTCJul 19, 02:10 UTC2h 7m
2026-07-18 AAL2065 PHL → MCO Jul 18, 17:00 UTCJul 18, 18:55 UTC1h 55m
2026-07-18 AAL2065 PHL → PHL Jul 18, 15:30 UTCJul 18, 15:35 UTC5m
2026-07-18 AAL3225 - Jul 18, 13:55 UTCJul 18, 14:55 UTC1h 0m
2026-07-18 AAL3225 PSQ → BOS Jul 18, 11:35 UTCJul 18, 12:35 UTC1h 0m
2026-07-18 AAL3225 PHL → PHL Jul 18, 11:20 UTCJul 18, 11:25 UTC5m
2026-07-18 N977UY PHL → PHL Jul 18, 10:25 UTCJul 18, 10:30 UTC5m
2026-07-17 AAL991 DFW → PHL Jul 17, 23:14 UTCJul 18, 02:05 UTC2h 50m
2026-07-17 AAL2476 SAN → DFW Jul 17, 18:35 UTCJul 17, 21:15 UTC2h 40m
2026-07-17 AAL2476 - Jul 17, 18:40 UTCJul 17, 21:15 UTC2h 35m
2026-07-17 AAL2476 - Jul 17, 14:20 UTCJul 17, 17:09 UTC2h 50m
2026-07-17 AAL2612 DEN → DFW Jul 17, 11:15 UTCJul 17, 12:50 UTC1h 35m
2026-07-17 AAL2500 PHL → DEN Jul 17, 00:35 UTCJul 17, 03:50 UTC3h 15m

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 N977UY page for operator, model, and routing details .

Mode-S AD9F7F frequently asked

What is Mode-S code AD9F7F?
AD9F7F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N977UY.
Where is Mode-S AD9F7F registered?
Mode-S code AD9F7F 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 AD9F7F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 02:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD9F7F, octal 53317577, decimal 11,378,559.
What flights does AD9F7F operate?
Mode-S AD9F7F has broadcast 20 distinct callsigns, including AAL2065, AAL3225, AAL1949, AAL3224, AAL1475.