Apparatus

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sensors Mode-S transponder

A0681C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N125UW · AIRBUS A-320 · operated by AMERICAN AIRLINES INC

Hex
A0681C
Octal
50064034
Decimal
10,512,412
Country
US
Tail
N125UW
Type
A320
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
583
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A0681C.

Country allocation

The ICAO 24-bit address A0681C 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
AAL2166 - 14 2026-07-14
AAL2421 - 13 2026-07-15
AAL2142 American Airlines 13 2026-07-24
AAL2414 American Airlines 12 2026-06-15
AAL1993 American Airlines 11 2026-07-25
AAL3233 - 10 2026-06-19
AAL1111 - 10 2026-07-08
AAL2433 American Airlines 9 2026-05-04
AAL1802 - 9 2026-07-13
AAL2496 American Airlines 8 2026-04-26
AAL1835 - 8 2026-07-17
AAL1801 - 8 2026-07-10
AAL425 - 7 2026-07-10
AAL2288 - 7 2026-07-03
AAL1783 American Airlines 7 2026-05-05
AAL2497 American Airlines 6 2026-07-23
AAL2330 - 6 2026-07-19
AAL1888 - 6 2026-07-18
AAL1351 - 6 2026-06-19
AAL1087 - 6 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1964 YUL → DFW Jul 26, 20:20 UTCJul 26, 23:00 UTC2h 40m
2026-07-26 AAL1963 DFW → YUL Jul 26, 15:30 UTCJul 26, 18:45 UTC3h 15m
2026-07-26 AAL2971 LAX → DFW Jul 26, 11:10 UTCJul 26, 14:10 UTC3h 0m
2026-07-26 AAL2971 LAX → DFW Jul 26, 11:09 UTCJul 26, 14:07 UTC2h 58m
2026-07-26 AAL391 DFW → ALB Jul 26, 03:05 UTCJul 26, 06:05 UTC3h 0m
2026-07-26 AAL391 DFW → ALB Jul 26, 03:04 UTCJul 26, 05:59 UTC2h 55m
2026-07-26 AAL3274 DFW → BOS Jul 26, 01:00 UTCJul 26, 01:45 UTC45m
2026-07-25 AAL3274 DFW → BOS Jul 25, 23:10 UTCJul 25, 23:55 UTC45m
2026-07-25 AAL1993 YYZ → DFW Jul 25, 19:05 UTCJul 25, 21:50 UTC2h 45m
2026-07-25 AAL1993 YYZ → DFW Jul 25, 15:10 UTCJul 25, 17:50 UTC2h 40m
2026-07-25 AAL2889 LGA → CLT Jul 25, 04:05 UTCJul 25, 04:45 UTC40m
2026-07-25 AAL2889 LGA → CLT Jul 25, 02:35 UTCJul 25, 03:15 UTC40m
2026-07-24 AAL1477 SRQ → CLT Jul 24, 20:35 UTCJul 25, 01:00 UTC4h 25m
2026-07-24 AAL2142 BOS → DCA Jul 24, 17:05 UTCJul 24, 18:55 UTC1h 50m
2026-07-24 AAL2142 BOS → DCA Jul 24, 14:15 UTCJul 24, 16:05 UTC1h 50m
2026-07-24 AAL3098 - Jul 24, 12:10 UTCJul 24, 12:55 UTC45m
2026-07-24 AAL546 DFW → SAT Jul 24, 01:10 UTCJul 24, 01:55 UTC45m
2026-07-23 AAL3311 AUS → CLT Jul 23, 23:00 UTCJul 23, 23:45 UTC45m
2026-07-23 AAL3311 AUS → CLT Jul 23, 22:56 UTCJul 23, 23:41 UTC45m
2026-07-23 AAL2497 JFK → PHX Jul 23, 19:45 UTCJul 23, 21:35 UTC1h 50m
2026-07-23 AAL2497 JFK → PHX Jul 23, 19:41 UTCJul 23, 21:32 UTC1h 51m
2026-07-23 AAL1405 - Jul 23, 17:00 UTCJul 23, 18:20 UTC1h 20m
2026-07-23 AAL1405 RNO → PHX Jul 23, 16:55 UTCJul 23, 18:22 UTC1h 27m
2026-07-23 AAL1405 - Jul 23, 14:35 UTCJul 23, 15:55 UTC1h 20m
2026-07-23 AAL987 ORD → BDL Jul 23, 12:10 UTCJul 23, 13:10 UTC1h 0m
2026-07-23 AAL3159 SGU → PHX Jul 23, 05:15 UTCJul 23, 06:00 UTC45m
2026-07-23 AAL2333 PHX → EWR Jul 23, 02:45 UTCJul 23, 03:30 UTC45m
2026-07-23 AAL2333 PHX → EWR Jul 23, 00:55 UTCJul 23, 01:20 UTC25m
2026-07-22 AAL3069 JAX → CLT Jul 22, 17:45 UTCJul 22, 23:35 UTC5h 50m
2026-07-22 AAL1937 CLT → BOS Jul 22, 13:45 UTCJul 22, 15:55 UTC2h 10m
2026-07-21 AAL2357 DFW → DEN Jul 21, 22:45 UTCJul 22, 01:00 UTC2h 15m
2026-07-21 AAL2418 AUS → PHX Jul 21, 20:00 UTCJul 21, 21:40 UTC1h 40m
2026-07-21 AAL2418 AUS → PHX Jul 21, 17:35 UTCJul 21, 18:55 UTC1h 20m
2026-07-21 AAL2858 STL → ORD Jul 21, 12:15 UTCJul 21, 16:05 UTC3h 50m
2026-07-21 AAL2858 STL → ORD Jul 21, 12:10 UTCJul 21, 16:03 UTC3h 53m
2026-07-21 AAL2940 - Jul 21, 00:55 UTCJul 21, 02:35 UTC1h 40m
2026-07-20 AAL1738 PLS → PHL Jul 20, 19:47 UTCJul 20, 23:10 UTC3h 23m
2026-07-20 AAL1738 PLS → PHL Jul 20, 15:30 UTCJul 20, 23:10 UTC7h 40m
2026-07-20 AAL709 JAX → PHL Jul 20, 11:10 UTCJul 20, 12:55 UTC1h 45m
2026-07-20 AAL709 JAX → PHL Jul 20, 11:08 UTCJul 20, 12:51 UTC1h 43m
2026-07-19 AAL2844 BUF → PHL Jul 19, 23:30 UTCJul 20, 03:15 UTC3h 45m
2026-07-19 AAL2330 PSP → PHX Jul 19, 20:07 UTCJul 19, 20:55 UTC48m
2026-07-19 AAL2330 - Jul 19, 17:55 UTCJul 19, 18:25 UTC30m
2026-07-19 AAL2858 - Jul 19, 12:10 UTCJul 19, 15:50 UTC3h 40m
2026-07-18 AAL2844 BUF → PHL Jul 18, 23:25 UTCJul 19, 03:05 UTC3h 40m
2026-07-18 AAL2710 - Jul 18, 19:40 UTCJul 18, 21:55 UTC2h 15m
2026-07-18 AAL2710 IAH → PHX Jul 18, 19:40 UTCJul 18, 21:54 UTC2h 14m
2026-07-18 AAL2710 - Jul 18, 16:10 UTCJul 18, 18:25 UTC2h 15m
2026-07-18 AAL1404 DEN → PHX Jul 18, 13:30 UTCJul 18, 15:00 UTC1h 30m
2026-07-18 AAL3255 - Jul 18, 05:20 UTCJul 18, 06:45 UTC1h 25m

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 N125UW page for operator, model, and routing details .

Mode-S A0681C frequently asked

What is Mode-S code A0681C?
A0681C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N125UW.
Where is Mode-S A0681C registered?
Mode-S code A0681C 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 A0681C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0681C, octal 50064034, decimal 10,512,412.
What flights does A0681C operate?
Mode-S A0681C has broadcast 20 distinct callsigns, including AAL2166, AAL2421, AAL2142, AAL2414, AAL1993.