sensors Mode-S transponder

AB4AE9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N827AN · BOEING 787-9 Dreamliner · operated by AMERICAN AIRLINES INC

Hex
AB4AE9
Octal
52645351
Decimal
11,225,833
Country
US
Tail
N827AN
Type
B789
Broadcasting now · callsign AAL950 · 8,900 ft
Flights observed
131
Distinct callsigns
20
Country
US
Last broadcast
13h ago

Current position

AB4AE9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB4AE9 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AAL963 DFW → GRU May 29, 02:20 UTCMay 29, 11:55 UTC9h 35m
2026-05-28 AAL128 ICN → DFW May 28, 09:35 UTCMay 28, 22:45 UTC13h 10m
2026-05-28 AAL128 ICN → DFW May 28, 04:35 UTCMay 28, 22:40 UTC18h 5m
2026-05-27 AAL128 ICN → DFW May 27, 22:20 UTCMay 28, 22:15 UTC23h 55m
2026-05-27 AAL127 DFW → PVG May 27, 20:20 UTCMay 28, 20:15 UTC23h 55m
2026-05-27 AAL127 DFW → PVG May 27, 16:45 UTCMay 28, 12:00 UTC19h 15m
2026-05-26 AAL280P IAH → DFW May 26, 22:59 UTCMay 26, 23:49 UTC50m
2026-05-25 AAL280 ICN → DFW May 25, 10:10 UTCMay 25, 23:40 UTC13h 29m
2026-05-25 AAL280 ICN → DFW May 25, 10:06 UTCMay 25, 23:39 UTC13h 33m
2026-05-24 AAL281 DFW → ICN May 24, 16:55 UTCMay 25, 07:50 UTC14h 55m
2026-05-23 AAL128 ICN → DFW May 23, 12:20 UTCMay 24, 00:15 UTC11h 55m
2026-05-23 AAL128 ICN → DFW May 23, 11:20 UTCMay 24, 00:15 UTC12h 55m
2026-05-23 AAL128 ICN → DFW May 23, 06:50 UTCMay 24, 00:15 UTC17h 25m
2026-05-22 AAL127 DFW → PVG May 22, 16:45 UTCMay 23, 05:40 UTC12h 54m
2026-05-21 AAL280 ICN → DFW May 21, 09:40 UTCMay 21, 21:45 UTC12h 5m
2026-05-20 AAL281 DFW → ICN May 20, 17:00 UTCMay 21, 07:20 UTC14h 20m
2026-05-20 AAL962 GRU → DFW May 20, 01:25 UTCMay 20, 11:30 UTC10h 6m
2026-05-19 AAL951 JFK → GRU May 19, 01:14 UTCMay 19, 09:59 UTC8h 45m
2026-05-19 AAL951 JFK → GRU May 19, 01:15 UTCMay 19, 05:45 UTC4h 30m
2026-05-17 AAL293 DEL → JFK May 17, 18:15 UTCMay 18, 04:25 UTC10h 10m
2026-05-17 AAL293 DEL → JFK May 17, 18:14 UTCMay 18, 09:07 UTC14h 53m
2026-05-17 AAL292 JFK → DEL May 17, 01:10 UTCMay 17, 14:15 UTC13h 5m
2026-05-17 AAL292 JFK → DEL May 17, 01:07 UTCMay 17, 16:04 UTC14h 57m
2026-05-16 AAL235 FCO → JFK May 16, 10:01 UTCMay 16, 13:05 UTC3h 5m
2026-05-16 AAL235 FCO → JFK May 16, 09:58 UTCMay 16, 18:44 UTC8h 46m
2026-05-15 AAL110 ORD → FCO May 15, 23:15 UTCMay 16, 01:40 UTC2h 25m
2026-05-15 AAL110 ORD → FCO May 15, 23:11 UTCMay 16, 07:41 UTC8h 30m
2026-05-15 AAL111 FCO → ORD May 15, 08:15 UTCMay 15, 17:50 UTC9h 34m
2026-05-15 AAL111 FCO → ORD May 15, 08:13 UTCMay 15, 17:44 UTC9h 31m
2026-05-14 AAL718 PHL → FCO May 14, 21:35 UTCMay 15, 04:15 UTC6h 40m
2026-05-14 AAL718 PHL → FCO May 14, 21:30 UTCMay 15, 05:10 UTC7h 40m
2026-05-14 AAL279 DFW → SMF May 14, 10:55 UTCMay 14, 17:40 UTC6h 45m
2026-05-14 AAL279 DFW → SMF May 14, 10:51 UTCMay 14, 17:40 UTC6h 49m
2026-05-14 AAL278 DFW → PHL May 14, 00:10 UTCMay 14, 06:20 UTC6h 10m
2026-05-13 AAL719 FCO → PHL May 13, 10:35 UTCMay 13, 19:25 UTC8h 50m
2026-05-13 AAL236 JFK → FCO May 13, 06:00 UTCMay 13, 08:00 UTC2h 0m
2026-05-13 AAL236 JFK → FCO May 13, 00:20 UTCMay 13, 01:50 UTC1h 30m
2026-05-10 AAL235 FCO → JFK May 10, 09:35 UTCMay 10, 17:49 UTC8h 15m
2026-05-09 AAL110 ORD → FCO May 9, 22:10 UTCMay 10, 00:15 UTC2h 5m
2026-05-09 AAL110 ORD → FCO May 9, 22:09 UTCMay 10, 06:51 UTC8h 42m
2026-05-09 AAL111 FCO → ORD May 9, 08:25 UTCMay 9, 18:00 UTC9h 35m
2026-05-09 AAL111 FCO → ORD May 9, 08:24 UTCMay 9, 17:55 UTC9h 31m
2026-05-08 AAL718 PHL → FCO May 8, 21:00 UTCMay 9, 04:15 UTC7h 15m
2026-05-08 AAL718 PHL → FCO May 8, 20:57 UTCMay 9, 05:04 UTC8h 7m
2026-05-08 AAL259 LIS → PHL May 8, 10:25 UTCMay 8, 17:30 UTC7h 5m
2026-05-08 AAL258 PHL → LIS May 8, 01:24 UTCMay 8, 07:24 UTC6h 0m
2026-05-07 AAL259 LIS → PHL May 7, 10:25 UTCMay 7, 17:50 UTC7h 25m
2026-05-07 AAL258 PHL → LIS May 7, 01:50 UTCMay 7, 07:45 UTC5h 55m
2026-05-06 AAL715 VCE → PHL May 6, 10:20 UTCMay 6, 18:50 UTC8h 29m
2026-05-06 AAL715 VCE → PHL May 6, 10:17 UTCMay 6, 18:40 UTC8h 23m

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 N827AN page for operator, model, and routing details .

Mode-S AB4AE9 frequently asked

What is Mode-S code AB4AE9?
AB4AE9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N827AN.
Where is Mode-S AB4AE9 registered?
Mode-S code AB4AE9 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 AB4AE9 broadcasting right now?
Yes. Mode-S AB4AE9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4AE9, octal 52645351, decimal 11,225,833.
What flights does AB4AE9 operate?
Mode-S AB4AE9 has broadcast 20 distinct callsigns, including AAL110, AAL111, AAL719, AAL718, AAL236.