Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ABAFE4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N852ML · BOEING 787-9 Dreamliner · operated by BOEING CO

Hex
ABAFE4
Octal
52727744
Decimal
11,251,684
Country
US
Tail
N852ML
Type
B789
No current signal · last broadcast 1d ago
Flights observed
249
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ABAFE4.

Country allocation

The ICAO 24-bit address ABAFE4 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
AAL86 - 17 2026-07-11
AAL737 - 17 2026-07-04
AAL91 - 16 2026-06-28
AAL728 - 16 2026-07-05
AAL135 - 16 2026-07-09
AAL55 - 15 2026-07-10
AAL54 - 15 2026-06-29
AAL98 American Airlines 14 2026-06-04
AAL87 American Airlines 14 2026-06-14
AAL736 - 14 2026-07-06
AAL729 - 14 2026-07-05
AAL101 - 14 2026-07-11
AAL50 - 13 2026-07-02
AAL100 - 11 2026-07-12
AAL106 American Airlines 10 2026-06-05
AAL105 American Airlines 10 2026-06-04
AAL21 - 8 2026-07-12
AAL134 - 7 2026-07-09
AAL136 American Airlines 4 2026-05-19
AAL9796 American Airlines 2 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 AAL21 LHR → DFW Jul 12, 09:25 UTCJul 12, 18:30 UTC9h 5m
2026-07-12 AAL100 JFK → LHR Jul 12, 00:22 UTCJul 12, 06:35 UTC6h 13m
2026-07-12 AAL100 JFK → LHR Jul 12, 00:25 UTCJul 12, 06:35 UTC6h 10m
2026-07-11 AAL101 LHR → JFK Jul 11, 09:55 UTCJul 11, 17:00 UTC7h 5m
2026-07-11 AAL86 - Jul 11, 00:15 UTCJul 11, 07:20 UTC7h 5m
2026-07-11 AAL86 ORD → LHR Jul 11, 00:14 UTCJul 11, 07:08 UTC6h 54m
2026-07-10 AAL55 LHR → ORD Jul 10, 11:55 UTCJul 10, 20:00 UTC8h 5m
2026-07-09 AAL134 - Jul 9, 23:30 UTCJul 10, 09:30 UTC10h 0m
2026-07-09 AAL135 - Jul 9, 07:40 UTCJul 9, 18:05 UTC10h 25m
2026-07-08 AAL100 JFK → LHR Jul 8, 22:35 UTCJul 9, 05:05 UTC6h 30m
2026-07-08 AAL101 - Jul 8, 09:50 UTCJul 8, 16:45 UTC6h 55m
2026-07-07 AAL100 JFK → LHR Jul 7, 23:00 UTCJul 8, 05:15 UTC6h 15m
2026-07-07 AAL101 - Jul 7, 09:50 UTCJul 7, 16:50 UTC7h 0m
2026-07-06 AAL86 - Jul 6, 23:30 UTCJul 7, 06:45 UTC7h 15m
2026-07-06 AAL86 ORD → LHR Jul 6, 23:30 UTCJul 7, 06:32 UTC7h 2m
2026-07-06 AAL55 - Jul 6, 11:35 UTCJul 6, 19:25 UTC7h 50m
2026-07-06 AAL736 - Jul 6, 02:40 UTCJul 6, 09:25 UTC6h 45m
2026-07-06 AAL736 PHL → PHL Jul 6, 02:25 UTCJul 6, 02:30 UTC5m
2026-07-05 AAL729 - Jul 5, 08:55 UTCJul 5, 16:10 UTC7h 15m
2026-07-05 AAL728 PHL → LHR Jul 5, 00:10 UTCJul 5, 06:30 UTC6h 20m
2026-07-04 AAL737 - Jul 4, 11:50 UTCJul 4, 19:00 UTC7h 10m
2026-07-04 AAL737 LHR → PHL Jul 4, 11:47 UTCJul 4, 19:09 UTC7h 22m
2026-07-03 AAL134 - Jul 3, 23:30 UTCJul 4, 09:20 UTC9h 50m
2026-07-03 AAL135 LHR → LAX Jul 3, 09:15 UTCJul 3, 19:35 UTC10h 20m
2026-07-02 AAL50 DFW → LHR Jul 2, 20:25 UTCJul 3, 05:05 UTC8h 40m
2026-07-01 AAL21 - Jul 1, 09:35 UTCJul 1, 18:55 UTC9h 20m
2026-07-01 AAL21 LHR → DFW Jul 1, 09:31 UTCJul 1, 18:56 UTC9h 25m
2026-06-30 AAL100 - Jun 30, 22:30 UTCJul 1, 05:05 UTC6h 35m
2026-06-30 AAL101 - Jun 30, 09:45 UTCJun 30, 10:55 UTC1h 10m
2026-06-30 AAL101 LHR → JFK Jun 30, 09:40 UTCJun 30, 16:34 UTC6h 54m
2026-06-30 AAL101 LHR → JFK Jun 30, 09:40 UTCJun 30, 16:18 UTC6h 38m
2026-06-29 AAL86 - Jun 29, 23:25 UTCJun 30, 06:25 UTC7h 0m
2026-06-29 AAL86 ORD → LHR Jun 29, 23:20 UTCJun 30, 06:22 UTC7h 2m
2026-06-29 AAL55 - Jun 29, 16:59 UTCJun 29, 19:35 UTC2h 35m
2026-06-29 AAL55 - Jun 29, 11:45 UTCJun 29, 16:55 UTC5h 10m
2026-06-29 AAL55 LHR → ORD Jun 29, 11:41 UTCJun 29, 19:30 UTC7h 49m
2026-06-29 AAL54 ORD → LHR Jun 29, 02:15 UTCJun 29, 09:25 UTC7h 10m
2026-06-29 AAL54 - Jun 29, 02:20 UTCJun 29, 09:29 UTC7h 10m
2026-06-28 AAL91 - Jun 28, 14:14 UTCJun 28, 21:59 UTC7h 45m
2026-06-27 AAL134 - Jun 27, 23:45 UTCJun 28, 09:50 UTC10h 5m
2026-06-27 AAL135 LHR → LAX Jun 27, 07:45 UTCJun 27, 08:39 UTC55m
2026-06-27 AAL135 LHR → LAX Jun 27, 07:44 UTCJun 27, 18:12 UTC10h 28m
2026-06-26 AAL50 - Jun 26, 20:44 UTCJun 27, 04:59 UTC8h 15m
2026-06-26 AAL50 DFW → LHR Jun 26, 20:43 UTCJun 27, 05:13 UTC8h 30m
2026-06-25 AAL21 - Jun 25, 09:29 UTCJun 25, 18:50 UTC9h 20m
2026-06-25 AAL728 PSQ → LHR Jun 25, 00:35 UTCJun 25, 06:44 UTC6h 10m
2026-06-25 AAL728 PHL → LHR Jun 25, 00:34 UTCJun 25, 06:41 UTC6h 7m
2026-06-24 AAL737 - Jun 24, 11:59 UTCJun 24, 19:10 UTC7h 10m
2026-06-24 AAL54 - Jun 24, 08:14 UTCJun 24, 09:34 UTC1h 20m
2026-06-24 AAL54 - Jun 24, 02:45 UTCJun 24, 04:50 UTC2h 5m

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 N852ML page for operator, model, and routing details .

Mode-S ABAFE4 frequently asked

What is Mode-S code ABAFE4?
ABAFE4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N852ML.
Where is Mode-S ABAFE4 registered?
Mode-S code ABAFE4 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 ABAFE4 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABAFE4, octal 52727744, decimal 11,251,684.
What flights does ABAFE4 operate?
Mode-S ABAFE4 has broadcast 20 distinct callsigns, including AAL86, AAL737, AAL91, AAL728, AAL135.