Apparatus

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sensors Mode-S transponder

A13501

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N177US · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A13501
Octal
50232401
Decimal
10,564,865
Country
US
Tail
N177US
Type
A321
No current signal · last broadcast Jul 26, 19:10 UTC
Flights observed
482
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:10 UTC

Last known position

Most recent position reported by Mode-S A13501.

Country allocation

The ICAO 24-bit address A13501 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
AAL3320 - 7 2026-07-07
AAL2516 American Airlines 7 2026-04-29
AAL2387 American Airlines 7 2026-05-21
AAL1892 American Airlines 7 2026-04-29
AAL2947 - 6 2026-07-15
AAL2284 - 6 2026-06-29
AAL402 - 5 2026-07-13
AAL1598 American Airlines 5 2026-05-18
AAL2848 - 4 2026-06-25
AAL2811 - 4 2026-07-15
AAL2600 American Airlines 4 2026-05-09
AAL2407 - 4 2026-07-07
AAL1764 American Airlines 4 2026-06-25
AAL810 American Airlines 3 2026-06-14
AAL783 - 3 2026-07-02
AAL630 American Airlines 3 2026-05-16
AAL466 American Airlines 3 2026-04-16
AAL346 - 3 2026-07-02
AAL3176 - 3 2026-06-30
AAL3138 American Airlines 3 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1385 PHL → PHX Jul 26, 18:20 UTCJul 26, 19:10 UTC50m
2026-07-26 AAL1099 BDL → CLT Jul 26, 13:14 UTCJul 26, 16:49 UTC3h 35m
2026-07-26 AAL1099 BDL → CLT Jul 26, 13:15 UTCJul 26, 16:45 UTC3h 30m
2026-07-26 AAL2373 SFO → CLT Jul 26, 02:06 UTCJul 26, 05:50 UTC3h 44m
2026-07-26 AAL2373 SFO → CLT Jul 26, 02:10 UTCJul 26, 06:00 UTC3h 50m
2026-07-25 AAL2320 BOS → ORD Jul 25, 22:25 UTCJul 25, 23:50 UTC1h 25m
2026-07-25 AAL2320 BOS → ORD Jul 25, 19:45 UTCJul 25, 21:05 UTC1h 20m
2026-07-25 AAL1285 DFW → BOS Jul 25, 16:00 UTCJul 25, 18:10 UTC2h 10m
2026-07-25 AAL2715 PHL → TPA Jul 25, 12:30 UTCJul 25, 14:30 UTC2h 0m
2026-07-24 AAL1422 DFW → CHS Jul 24, 22:13 UTCJul 25, 00:05 UTC1h 52m
2026-07-24 AAL2127 LGA → DCA Jul 24, 18:10 UTCJul 24, 19:20 UTC1h 10m
2026-07-24 AAL2127 LGA → DCA Jul 24, 15:35 UTCJul 24, 16:45 UTC1h 10m
2026-07-24 AAL1462 MIA → LGA Jul 24, 11:20 UTCJul 24, 13:00 UTC1h 40m
2026-07-24 AAL2224 MSY → DFW Jul 24, 03:35 UTCJul 24, 06:45 UTC3h 10m
2026-07-24 AAL2224 MSY → DFW Jul 24, 03:31 UTCJul 24, 06:41 UTC3h 10m
2026-07-23 AAL1385 PHL → PHX Jul 23, 18:20 UTCJul 24, 00:00 UTC5h 40m
2026-07-23 AAL1171 MIA → LGA Jul 23, 14:15 UTCJul 23, 16:20 UTC2h 5m
2026-07-23 AAL263R - Jul 23, 11:05 UTCJul 23, 13:00 UTC1h 55m
2026-07-23 AAL3314 SMF → DFW Jul 23, 06:50 UTCJul 23, 09:40 UTC2h 50m
2026-07-23 AAL3314 SMF → DFW Jul 23, 02:35 UTCJul 23, 05:30 UTC2h 55m
2026-07-22 AAL2409 ORD → TPA Jul 22, 22:50 UTCJul 23, 00:15 UTC1h 25m
2026-07-22 AAL2409 ORD → TPA Jul 22, 22:44 UTCJul 23, 00:57 UTC2h 13m
2026-07-22 AAL2832 DFW → SFO Jul 22, 19:25 UTCJul 22, 20:40 UTC1h 15m
2026-07-22 AAL2832 DFW → SFO Jul 22, 19:23 UTCJul 22, 20:39 UTC1h 16m
2026-07-22 AAL2832 DFW → SFO Jul 22, 17:05 UTCJul 22, 18:20 UTC1h 15m
2026-07-22 AAL2084 MSP → CLT Jul 22, 14:15 UTCJul 22, 15:35 UTC1h 20m
2026-07-22 AAL2084 MSP → CLT Jul 22, 14:14 UTCJul 22, 15:34 UTC1h 20m
2026-07-22 AAL2084 MSP → CLT Jul 22, 12:00 UTCJul 22, 13:05 UTC1h 5m
2026-07-22 AAL3072 SEA → DFW Jul 22, 00:05 UTCJul 22, 03:20 UTC3h 15m
2026-07-21 AAL3072 SEA → DFW Jul 21, 23:30 UTCJul 21, 23:35 UTC5m
2026-07-21 AAL2081 SMF → DFW Jul 21, 19:15 UTCJul 21, 21:35 UTC2h 20m
2026-07-21 AAL2081 SMF → DFW Jul 21, 15:50 UTCJul 21, 18:05 UTC2h 15m
2026-07-21 AAL1707 CLT → EWR Jul 21, 12:10 UTCJul 21, 14:15 UTC2h 5m
2026-07-21 AAL349 LGA → ORD Jul 21, 09:15 UTCJul 21, 10:15 UTC1h 0m
2026-07-21 AAL1962 CLT → PIT Jul 21, 04:40 UTCJul 21, 05:35 UTC55m
2026-07-18 AAL409R DFW → CLT Jul 18, 02:50 UTCJul 18, 04:55 UTC2h 5m
2026-07-17 AAL2286 - Jul 17, 20:44 UTCJul 18, 00:10 UTC3h 25m
2026-07-17 AAL2286 PDX → DFW Jul 17, 20:43 UTCJul 18, 00:06 UTC3h 23m
2026-07-17 AAL2286 DFW → PDX Jul 17, 15:55 UTCJul 17, 19:09 UTC3h 15m
2026-07-17 AAL1707 CLT → EWR Jul 17, 12:04 UTCJul 17, 14:15 UTC2h 10m
2026-07-17 AAL1707 CLT → EWR Jul 17, 12:01 UTCJul 17, 14:14 UTC2h 13m
2026-07-17 AAL2514 - Jul 17, 05:35 UTCJul 17, 10:05 UTC4h 30m
2026-07-17 AAL3072 DFW → SFO Jul 17, 00:10 UTCJul 17, 03:20 UTC3h 10m
2026-07-16 AAL2762 - Jul 16, 19:05 UTCJul 16, 22:00 UTC2h 55m
2026-07-16 AAL2762 DFW → MIA Jul 16, 14:35 UTCJul 16, 16:55 UTC2h 20m
2026-07-16 AAL2928 AUS → DFW Jul 16, 12:30 UTCJul 16, 13:10 UTC40m
2026-07-16 AAL2707 - Jul 16, 07:40 UTCJul 16, 08:15 UTC35m
2026-07-15 AAL2947 - Jul 15, 22:35 UTCJul 16, 01:20 UTC2h 45m
2026-07-15 AAL2947 PHL → PHL Jul 15, 21:50 UTCJul 15, 22:05 UTC15m
2026-07-15 AAL2947 DFW → PHL Jul 15, 17:50 UTCJul 15, 20:40 UTC2h 50m

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 N177US page for operator, model, and routing details .

Mode-S A13501 frequently asked

What is Mode-S code A13501?
A13501 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N177US.
Where is Mode-S A13501 registered?
Mode-S code A13501 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 A13501 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13501, octal 50232401, decimal 10,564,865.
What flights does A13501 operate?
Mode-S A13501 has broadcast 20 distinct callsigns, including AAL3320, AAL2516, AAL2387, AAL1892, AAL2947.