Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4F2EE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N418MC · BOEING 747-400 · operated by ATLAS AIR INC

Hex
A4F2EE
Octal
51171356
Decimal
10,810,094
Country
US
Tail
N418MC
Type
B744
No current signal · last broadcast 29d ago
Flights observed
130
Distinct callsigns
20
Country
US
Last broadcast
29d ago

Last known position

Most recent position reported by Mode-S A4F2EE.

Country allocation

The ICAO 24-bit address A4F2EE 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
QFA7552 Qantas 18 2026-07-20
QFA7554 - 16 2026-07-16
QFA7550 Qantas 15 2026-07-24
QFA7581 Qantas 14 2026-07-22
QFA7521 - 12 2026-07-17
QFA7583 Qantas 7 2026-07-26
GTI8523 Atlas Air 5 2026-06-13
GTI8052 Atlas Air 5 2026-06-02
GTI658 Atlas Air 4 2026-06-19
QFA7591 - 3 2026-06-28
GTI9447 Atlas Air 3 2026-06-12
GTI8030 Atlas Air 3 2026-06-03
GTI654 Atlas Air 3 2026-05-23
GTI9373 Atlas Air 2 2026-06-05
GTI8756 Atlas Air 2 2026-06-08
GTI8140 Atlas Air 2 2026-05-29
GTI8139 Atlas Air 2 2026-05-29
GTI9967 Atlas Air 1 2026-05-28
GTI9902 Atlas Air 1 2026-05-15
GTI9789 Atlas Air 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GTI7583 SYD → ICN Jul 26, 21:00 UTCJul 26, 21:30 UTC30m
2026-07-26 QFA7583 PVG → ORD Jul 26, 11:05 UTCJul 26, 17:25 UTC6h 20m
2026-07-25 QFA7583 PVG → ORD Jul 25, 16:00 UTCJul 26, 08:50 UTC16h 51m
2026-07-25 QFA7583 PVG → ORD Jul 25, 04:05 UTCJul 25, 13:35 UTC9h 30m
2026-07-24 QFA7550 DFW → SYD Jul 24, 07:45 UTCJul 24, 09:30 UTC1h 45m
2026-07-23 QFA7550 DFW → SYD Jul 23, 23:55 UTCJul 24, 00:05 UTC10m
2026-07-23 QFA7550 DFW → SYD Jul 23, 15:30 UTCJul 23, 20:45 UTC5h 15m
2026-07-23 QFA7550 DFW → SYD Jul 23, 08:40 UTCJul 23, 12:10 UTC3h 30m
2026-07-23 QFA7550 DFW → SYD Jul 23, 02:10 UTCJul 23, 04:05 UTC1h 55m
2026-07-22 QFA7581 PVG → ORD Jul 22, 11:25 UTCJul 22, 16:05 UTC4h 40m
2026-07-21 QFA7581 PVG → ORD Jul 21, 16:40 UTCJul 22, 02:10 UTC9h 30m
2026-07-21 QFA7581 PVG → ORD Jul 21, 02:15 UTCJul 21, 11:10 UTC8h 55m
2026-07-20 QFA7581 PVG → ORD Jul 20, 22:35 UTCJul 20, 23:25 UTC50m
2026-07-20 QFA7552 ORD → SYD Jul 20, 00:55 UTCJul 20, 03:50 UTC2h 55m
2026-07-19 QFA7552 ORD → SYD Jul 19, 14:15 UTCJul 19, 22:40 UTC8h 25m
2026-07-19 QFA7552 ORD → SYD Jul 19, 06:45 UTCJul 19, 11:50 UTC5h 5m
2026-07-19 QFA7552 ORD → SYD Jul 19, 00:10 UTCJul 19, 03:35 UTC3h 25m
2026-07-17 QFA7521 ANC → ORD Jul 17, 14:39 UTCJul 17, 20:00 UTC5h 20m
2026-07-16 QFA7521 - Jul 16, 17:35 UTCJul 17, 12:45 UTC19h 10m
2026-07-16 QFA7521 - Jul 16, 17:10 UTCJul 17, 12:45 UTC19h 35m
2026-07-16 QFA7521 - Jul 16, 10:29 UTCJul 17, 07:05 UTC20h 35m
2026-07-16 QFA7554 MEL → SYD Jul 16, 05:15 UTCJul 16, 06:25 UTC1h 10m
2026-07-15 QFA7554 - Jul 15, 15:10 UTCJul 16, 01:25 UTC10h 15m
2026-07-15 QFA7554 - Jul 15, 11:05 UTCJul 15, 11:30 UTC25m
2026-07-15 QFA7554 - Jul 15, 04:05 UTCJul 15, 06:45 UTC2h 40m
2026-07-13 QFA7554 ORD → DFW Jul 13, 20:25 UTCJul 13, 22:10 UTC1h 45m
2026-07-13 QFA7554 JFK → ORD Jul 13, 15:40 UTCJul 13, 17:25 UTC1h 45m
2026-07-13 QFA7583 - Jul 13, 05:15 UTCJul 13, 11:30 UTC6h 15m
2026-07-12 QFA7583 - Jul 12, 12:01 UTCJul 13, 03:15 UTC15h 15m
2026-07-12 QFA7583 - Jul 12, 09:35 UTCJul 12, 09:55 UTC20m
2026-07-11 QFA7583 - Jul 11, 03:35 UTCJul 11, 10:55 UTC7h 20m
2026-07-09 QFA7550 - Jul 9, 21:10 UTCJul 10, 06:40 UTC9h 30m
2026-07-09 QFA7550 - Jul 9, 18:40 UTCJul 9, 19:05 UTC25m
2026-07-09 QFA7550 - Jul 9, 13:45 UTCJul 9, 14:15 UTC30m
2026-07-09 QFA7550 - Jul 9, 05:20 UTCJul 9, 08:55 UTC3h 35m
2026-07-08 QFA7550 - Jul 8, 23:20 UTCJul 9, 01:15 UTC1h 55m
2026-07-08 QFA7581 ANC → JFK Jul 8, 10:00 UTCJul 8, 16:10 UTC6h 10m
2026-07-07 QFA7581 - Jul 7, 16:10 UTCJul 8, 07:55 UTC15h 45m
2026-07-07 QFA7581 - Jul 7, 07:20 UTCJul 7, 10:20 UTC3h 0m
2026-07-06 QFA7581 - Jul 6, 21:20 UTCJul 7, 05:00 UTC7h 40m
2026-07-06 QFA7552 - Jul 6, 04:45 UTCJul 6, 07:35 UTC2h 50m
2026-07-05 QFA7552 - Jul 5, 17:50 UTCJul 6, 02:00 UTC8h 10m
2026-07-05 QFA7552 - Jul 5, 10:20 UTCJul 5, 15:40 UTC5h 20m
2026-07-05 QFA7552 - Jul 5, 03:25 UTCJul 5, 07:00 UTC3h 35m
2026-07-04 QFA7521 ANC → ORD Jul 4, 17:35 UTCJul 4, 23:35 UTC6h 0m
2026-07-04 QFA7521 - Jul 4, 06:35 UTCJul 4, 14:05 UTC7h 30m
2026-07-01 QFA7521 - Jul 1, 05:15 UTCJul 1, 14:35 UTC9h 20m
2026-06-30 QFA7554 MEL → SYD Jun 30, 04:55 UTCJun 30, 06:05 UTC1h 10m
2026-06-29 QFA7554 - Jun 29, 16:10 UTCJun 30, 02:35 UTC10h 26m
2026-06-29 QFA7554 - Jun 29, 12:55 UTCJun 29, 13:24 UTC30m

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 N418MC page for operator, model, and routing details .

Mode-S A4F2EE frequently asked

What is Mode-S code A4F2EE?
A4F2EE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N418MC.
Where is Mode-S A4F2EE registered?
Mode-S code A4F2EE 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 A4F2EE broadcasting right now?
No active broadcast right now. Last signal was 29d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4F2EE, octal 51171356, decimal 10,810,094.
What flights does A4F2EE operate?
Mode-S A4F2EE has broadcast 20 distinct callsigns, including QFA7552, QFA7554, QFA7550, QFA7581, QFA7521.