Apparatus

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sensors Mode-S transponder

AB129A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N812UP · BOEING 737 MAX 8 · operated by BOEING CO

Hex
AB129A
Octal
52611232
Decimal
11,211,418
Country
US
Tail
N812UP
Type
B38M
Broadcasting now · callsign AAL1382 · 4,650 ft
Flights observed
464
Distinct callsigns
20
Country
US
Last broadcast
21m ago

Current position

AB129A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB129A 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
AAL3315 - 8 2026-06-29
AAL2738 - 8 2026-06-27
AAL829 American Airlines 6 2026-06-25
AAL828 - 6 2026-06-25
AAL2616 - 6 2026-07-06
AAL1209 - 6 2026-07-01
AAL476 - 5 2026-07-12
AAL465 American Airlines 5 2026-05-20
AAL3316 - 5 2026-06-28
AAL3005 American Airlines 5 2026-05-20
AAL2788 American Airlines 5 2026-05-20
AAL2969 American Airlines 4 2026-04-20
AAL2871 - 4 2026-06-24
AAL2478 American Airlines 4 2026-05-15
AAL1842 - 4 2026-07-13
AAL1765 - 4 2026-07-09
AAL1639 - 4 2026-06-30
AAL628 American Airlines 3 2026-06-16
AAL348 - 3 2026-07-13
AAL3208 American Airlines 3 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 AAL1382 - Jul 18, 14:20 UTCJul 18, 16:30 UTC2h 10m
2026-07-18 AAL2637 PHX → SNA Jul 18, 04:25 UTCJul 18, 05:25 UTC1h 0m
2026-07-18 AAL2637 PHX → SNA Jul 18, 04:25 UTCJul 18, 05:20 UTC55m
2026-07-17 AAL2339 JFK → PHX Jul 17, 22:25 UTCJul 18, 02:55 UTC4h 31m
2026-07-17 AAL2339 JFK → PHX Jul 17, 22:21 UTCJul 18, 02:59 UTC4h 38m
2026-07-17 AAL763 CLT → ATL Jul 17, 17:09 UTCJul 17, 20:35 UTC3h 25m
2026-07-17 AAL763 CLT → ATL Jul 17, 12:40 UTCJul 17, 16:04 UTC3h 25m
2026-07-16 AAL1224 PHX → JFK Jul 16, 20:29 UTCJul 17, 01:05 UTC4h 35m
2026-07-16 AAL377 BOS → PHX Jul 16, 14:29 UTCJul 16, 19:15 UTC4h 46m
2026-07-16 AAL377 BOS → PHX Jul 16, 14:29 UTCJul 16, 19:14 UTC4h 45m
2026-07-15 AAL2306 DFW → BOS Jul 15, 22:50 UTCJul 16, 02:10 UTC3h 20m
2026-07-15 AAL1653 DFW → DFW Jul 15, 14:30 UTCJul 15, 20:50 UTC6h 20m
2026-07-15 AAL2782 IND → DFW Jul 15, 10:20 UTCJul 15, 12:05 UTC1h 45m
2026-07-15 AAL766 DFW → IND Jul 15, 02:05 UTCJul 15, 03:55 UTC1h 50m
2026-07-15 AAL766 DFW → IND Jul 15, 02:02 UTCJul 15, 03:47 UTC1h 45m
2026-07-14 AAL684R - Jul 14, 21:35 UTCJul 15, 00:10 UTC2h 34m
2026-07-14 AAL684R SNA → DFW Jul 14, 21:31 UTCJul 15, 00:05 UTC2h 34m
2026-07-14 AAL2684 - Jul 14, 17:50 UTCJul 14, 20:15 UTC2h 25m
2026-07-14 AAL1019 SJC → DFW Jul 14, 13:15 UTCJul 14, 16:20 UTC3h 5m
2026-07-14 AAL1940 DFW → SJC Jul 14, 04:05 UTCJul 14, 06:55 UTC2h 50m
2026-07-13 AAL1842 - Jul 13, 23:50 UTCJul 14, 01:50 UTC2h 0m
2026-07-13 AAL1842 FCA → DFW Jul 13, 22:53 UTCJul 14, 01:43 UTC2h 50m
2026-07-13 AAL1842 - Jul 13, 18:05 UTCJul 13, 19:45 UTC1h 40m
2026-07-13 AAL1382 - Jul 13, 14:00 UTCJul 13, 16:45 UTC2h 45m
2026-07-13 AAL348 - Jul 13, 02:45 UTCJul 13, 05:15 UTC2h 30m
2026-07-12 AAL476 SJO → DFW Jul 12, 20:36 UTCJul 13, 00:31 UTC3h 55m
2026-07-12 AAL476 SJO → DFW Jul 12, 20:35 UTCJul 13, 00:35 UTC4h 0m
2026-07-12 AAL597 - Jul 12, 16:25 UTCJul 12, 18:45 UTC2h 20m
2026-07-12 AAL2678 - Jul 12, 13:40 UTCJul 12, 14:10 UTC30m
2026-07-12 AAL2678 HAV → MIA Jul 12, 13:27 UTCJul 12, 14:10 UTC43m
2026-07-12 AAL17 - Jul 12, 11:20 UTCJul 12, 11:50 UTC30m
2026-07-11 AAL505 - Jul 11, 20:25 UTCJul 11, 23:00 UTC2h 35m
2026-07-11 AAL2995 JFK → MEX Jul 11, 13:55 UTCJul 11, 18:10 UTC4h 15m
2026-07-10 AAL832 PHX → JFK Jul 10, 23:10 UTCJul 11, 03:30 UTC4h 20m
2026-07-10 AAL2630 SMF → PHX Jul 10, 20:05 UTCJul 10, 21:35 UTC1h 30m
2026-07-10 AAL2630 PHX → SMF Jul 10, 17:15 UTCJul 10, 18:50 UTC1h 35m
2026-07-10 AAL2685 - Jul 10, 02:40 UTCJul 10, 03:40 UTC1h 0m
2026-07-10 AAL2685 SNA → PHX Jul 10, 02:40 UTCJul 10, 03:36 UTC56m
2026-07-10 AAL2685 - Jul 10, 00:45 UTCJul 10, 01:40 UTC55m
2026-07-09 AAL554 DFW → PHX Jul 9, 20:55 UTCJul 9, 22:50 UTC1h 55m
2026-07-09 AAL1623 DCA → DFW Jul 9, 16:40 UTCJul 9, 19:15 UTC2h 35m
2026-07-09 AAL1623 DCA → DFW Jul 9, 16:39 UTCJul 9, 19:09 UTC2h 30m
2026-07-09 AAL1623 - Jul 9, 12:30 UTCJul 9, 15:00 UTC2h 30m
2026-07-09 AAL2698 - Jul 9, 08:20 UTCJul 9, 10:30 UTC2h 10m
2026-07-09 AAL2698 RNO → DFW Jul 9, 08:13 UTCJul 9, 10:54 UTC2h 41m
2026-07-09 AAL1765 - Jul 9, 04:45 UTCJul 9, 06:05 UTC1h 20m
2026-07-09 AAL1765 PHX → RNO Jul 9, 04:43 UTCJul 9, 06:06 UTC1h 23m
2026-07-09 AAL1725 - Jul 9, 00:00 UTCJul 9, 03:15 UTC3h 15m
2026-07-08 AAL1706 - Jul 8, 20:25 UTCJul 8, 21:10 UTC45m
2026-07-08 AAL1706 CLT → CVG Jul 8, 20:22 UTCJul 8, 21:10 UTC48m

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 N812UP page for operator, model, and routing details .

Mode-S AB129A frequently asked

What is Mode-S code AB129A?
AB129A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N812UP.
Where is Mode-S AB129A registered?
Mode-S code AB129A 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 AB129A broadcasting right now?
Yes. Mode-S AB129A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB129A, octal 52611232, decimal 11,211,418.
What flights does AB129A operate?
Mode-S AB129A has broadcast 20 distinct callsigns, including AAL3315, AAL2738, AAL829, AAL828, AAL2616.