Apparatus

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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 1h ago
Flights observed
86
Distinct callsigns
20
Country
US
Last broadcast
1h 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
QFA7554 - 10 2026-06-30
QFA7552 - 10 2026-06-22
QFA7521 - 8 2026-07-04
QFA7581 - 6 2026-06-24
QFA7550 - 5 2026-06-25
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
GTI8860 Atlas Air 1 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-29 QFA7554 - Jun 29, 05:54 UTCJun 29, 08:44 UTC2h 50m
2026-06-29 QFA7554 ORD → DFW Jun 29, 01:39 UTCJun 29, 03:25 UTC1h 45m
2026-06-28 QFA7554 JFK → ORD Jun 28, 18:25 UTCJun 28, 20:25 UTC2h 0m
2026-06-28 QFA7591 - Jun 28, 00:45 UTCJun 28, 05:20 UTC4h 35m
2026-06-27 QFA7591 - Jun 27, 07:49 UTCJun 27, 21:55 UTC14h 5m
2026-06-27 QFA7591 SYD → AVV Jun 27, 01:54 UTCJun 27, 03:04 UTC1h 10m
2026-06-25 QFA7550 - Jun 25, 20:25 UTCJun 26, 06:00 UTC9h 35m
2026-06-25 QFA7550 - Jun 25, 17:34 UTCJun 25, 18:04 UTC30m
2026-06-25 QFA7550 - Jun 25, 12:54 UTCJun 25, 13:24 UTC30m
2026-06-25 QFA7550 - Jun 25, 07:05 UTCJun 25, 10:50 UTC3h 45m
2026-06-25 QFA7550 JFK → ORD Jun 25, 01:19 UTCJun 25, 03:24 UTC2h 5m
2026-06-24 QFA7581 - Jun 24, 10:45 UTCJun 24, 17:14 UTC6h 30m
2026-06-23 QFA7581 - Jun 23, 16:05 UTCJun 24, 08:55 UTC16h 50m
2026-06-22 QFA7581 - Jun 22, 09:54 UTCJun 22, 19:14 UTC9h 20m
2026-06-22 QFA7552 MEL → SYD Jun 22, 06:25 UTCJun 22, 07:34 UTC1h 10m
2026-06-22 QFA7552 AKL → MEL Jun 22, 01:05 UTCJun 22, 04:44 UTC3h 40m
2026-06-21 QFA7552 HNL → AKL Jun 21, 13:50 UTCJun 21, 22:15 UTC8h 25m
2026-06-21 QFA7552 - Jun 21, 11:40 UTCJun 21, 11:59 UTC20m
2026-06-21 QFA7552 - Jun 21, 07:04 UTCJun 21, 07:34 UTC30m
2026-06-21 QFA7552 - Jun 21, 00:34 UTCJun 21, 04:30 UTC3h 55m
2026-06-19 GTI658 ANC → ORD Jun 19, 23:49 UTCJun 20, 04:59 UTC5h 10m
2026-06-19 GTI658 ANC → ORD Jun 19, 13:34 UTCJun 19, 20:59 UTC7h 25m
2026-06-18 GTI657 ORD → ICN Jun 18, 20:15 UTCJun 19, 09:40 UTC13h 24m
2026-06-18 QFA7521 PVG → JFK Jun 18, 11:40 UTCJun 18, 17:00 UTC5h 20m
2026-06-17 QFA7521 PVG → JFK Jun 17, 14:00 UTCJun 18, 08:40 UTC18h 40m
2026-06-17 QFA7521 PVG → JFK Jun 17, 12:25 UTCJun 18, 08:40 UTC20h 15m
2026-06-17 QFA7521 PVG → JFK Jun 17, 05:35 UTCJun 18, 02:50 UTC21h 15m
2026-06-17 QFA7521 PVG → JFK Jun 17, 05:25 UTCJun 18, 02:50 UTC21h 25m
2026-06-16 QFA7554 ORD → HNL Jun 16, 04:10 UTCJun 16, 05:15 UTC1h 5m
2026-06-15 QFA7554 ORD → HNL Jun 15, 15:15 UTCJun 16, 01:55 UTC10h 40m
2026-06-15 QFA7554 ORD → HNL Jun 15, 05:04 UTCJun 15, 12:25 UTC7h 20m
2026-06-15 QFA7554 ORD → HNL Jun 15, 00:40 UTCJun 15, 02:39 UTC2h 0m
2026-06-13 GTI8523 ANC → ORD Jun 13, 16:10 UTCJun 13, 21:40 UTC5h 30m
2026-06-13 GTI8523 ANC → ORD Jun 13, 04:55 UTCJun 13, 14:15 UTC9h 20m
2026-06-12 GTI9447 RZE → HKG Jun 12, 07:20 UTCJun 12, 07:55 UTC35m
2026-06-11 GTI9447 RZE → HKG Jun 11, 20:35 UTCJun 12, 00:30 UTC3h 55m
2026-06-08 GTI9447 RZE → HKG Jun 8, 17:00 UTCJun 8, 18:05 UTC1h 5m
2026-06-08 GTI8756 ORD → HIF Jun 8, 00:55 UTCJun 8, 09:15 UTC8h 20m
2026-06-07 GTI8756 ORD → HIF Jun 7, 18:20 UTCJun 7, 21:25 UTC3h 5m
2026-06-06 GTI658 ANC → ORD Jun 6, 03:05 UTCJun 6, 08:20 UTC5h 15m
2026-06-05 GTI658 ANC → ORD Jun 5, 17:05 UTCJun 6, 00:25 UTC7h 20m
2026-06-05 GTI9373 CVG → IAH Jun 5, 00:55 UTCJun 5, 13:25 UTC12h 30m
2026-06-04 GTI9373 CVG → IAH Jun 4, 17:20 UTCJun 4, 22:10 UTC4h 50m
2026-06-04 GTI064 VCP → LIM Jun 4, 02:30 UTCJun 4, 14:25 UTC11h 55m

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 1h 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 QFA7554, QFA7552, QFA7521, QFA7581, QFA7550.