Apparatus

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sensors Mode-S transponder

A55E46

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N445MC · BOEING 747-400 · operated by ATLAS AIR INC

Hex
A55E46
Octal
51257106
Decimal
10,837,574
Country
US
Tail
N445MC
Type
B744
No current signal · last broadcast Jul 26, 16:50 UTC
Flights observed
217
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 16:50 UTC

Last known position

Most recent position reported by Mode-S A55E46.

Country allocation

The ICAO 24-bit address A55E46 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
GTI516 - 14 2026-07-15
GTI8085 Atlas Air 11 2026-04-17
GTI8901 - 9 2026-04-14
GTI8174 Atlas Air 8 2026-07-20
GTI8998 Atlas Air 6 2026-06-02
GTI8811 Atlas Air 6 2026-04-30
GTI8560 - 6 2026-07-22
GTI8559 Atlas Air 6 2026-07-21
GTI8523 - 6 2026-07-02
GTI518 Atlas Air 6 2026-07-24
GTI8997 Atlas Air 5 2026-06-01
GTI8816 Atlas Air 4 2026-05-04
GTI8154 Atlas Air 4 2026-07-26
GTI8153 Atlas Air 4 2026-06-07
GTI812 Atlas Air 4 2026-06-08
GTI8040 Atlas Air 4 2026-06-04
GTI517 Atlas Air 4 2026-07-23
GTI8812 Atlas Air 3 2026-04-30
GTI8642 Atlas Air 3 2026-04-25
GTI8577 Atlas Air 3 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GTI9154 ORD → HKG Jul 26, 16:25 UTCJul 26, 16:50 UTC25m
2026-07-26 GTI8154 AMS → ORD Jul 26, 11:05 UTCJul 26, 13:30 UTC2h 25m
2026-07-26 GTI8154 AMS → ORD Jul 26, 00:40 UTCJul 26, 07:40 UTC7h 1m
2026-07-25 GTI365 ANC → YYZ Jul 25, 16:20 UTCJul 25, 21:45 UTC5h 25m
2026-07-24 GTI365 ANC → YYZ Jul 24, 22:10 UTCJul 25, 14:25 UTC16h 15m
2026-07-24 GTI364 ORD → ICN Jul 24, 13:35 UTCJul 25, 13:30 UTC23h 55m
2026-07-24 GTI364 ORD → ICN Jul 24, 12:55 UTCJul 25, 08:45 UTC19h 50m
2026-07-24 GTI518 ANC → ORD Jul 24, 05:25 UTCJul 24, 09:55 UTC4h 30m
2026-07-23 GTI518 ANC → ORD Jul 23, 12:45 UTCJul 24, 03:30 UTC14h 45m
2026-07-23 GTI517 ANC → ICN Jul 23, 03:35 UTCJul 24, 03:30 UTC23h 55m
2026-07-23 GTI517 ANC → ICN Jul 23, 01:35 UTCJul 23, 22:00 UTC20h 25m
2026-07-23 GTI517 ANC → ICN Jul 23, 01:00 UTCJul 23, 22:00 UTC21h 0m
2026-07-22 GTI8560 ANC → DFW Jul 22, 16:50 UTCJul 22, 21:45 UTC4h 55m
2026-07-22 GTI8560 ANC → DFW Jul 22, 12:45 UTCJul 22, 14:20 UTC1h 35m
2026-07-22 GTI8560 - Jul 22, 04:15 UTCJul 22, 04:50 UTC35m
2026-07-21 GTI8559 GRK → SEA Jul 21, 22:10 UTCJul 21, 22:20 UTC10m
2026-07-21 GTI8559 GRK → SEA Jul 21, 19:15 UTCJul 21, 19:25 UTC10m
2026-07-21 GTI8559 GRK → SEA Jul 21, 15:45 UTCJul 21, 16:25 UTC40m
2026-07-21 GTI515 - Jul 21, 00:10 UTCJul 21, 12:05 UTC11h 55m
2026-07-20 GTI8174 ANC → NLU Jul 20, 18:10 UTCJul 20, 21:15 UTC3h 5m
2026-07-20 GTI8174 ANC → NLU Jul 20, 14:30 UTCJul 20, 14:40 UTC10m
2026-07-20 GTI8174 ANC → NLU Jul 20, 07:45 UTCJul 20, 13:50 UTC6h 5m
2026-07-19 GTI8174 ANC → NLU Jul 19, 16:05 UTCJul 20, 05:35 UTC13h 30m
2026-07-18 GTI525D - Jul 18, 20:05 UTCJul 18, 20:30 UTC25m
2026-07-18 GTI525D - Jul 18, 09:00 UTCJul 18, 19:30 UTC10h 30m
2026-07-17 GTI8418 BIF → HHN Jul 17, 21:05 UTCJul 18, 05:10 UTC8h 6m
2026-07-17 GTI8417 MIA → UIO Jul 17, 07:25 UTCJul 17, 17:44 UTC10h 20m
2026-07-16 GTI034 SCL → MIA Jul 16, 21:40 UTCJul 17, 02:25 UTC4h 45m
2026-07-16 GTI033 - Jul 16, 13:40 UTCJul 16, 15:35 UTC1h 55m
2026-07-16 GTI033 - Jul 16, 03:25 UTCJul 16, 11:30 UTC8h 5m
2026-07-15 GTI516 - Jul 15, 08:45 UTCJul 15, 15:55 UTC7h 10m
2026-07-14 GTI516 ICN → ANC Jul 14, 16:55 UTCJul 15, 06:05 UTC13h 9m
2026-07-14 GTI9980 OKO → ICN Jul 14, 02:10 UTCJul 14, 04:05 UTC1h 55m
2026-07-12 GTI8980 - Jul 12, 11:10 UTCJul 12, 21:55 UTC10h 45m
2026-07-11 GTI512 - Jul 11, 16:35 UTCJul 11, 19:25 UTC2h 50m
2026-07-11 GTI512R - Jul 11, 12:30 UTCJul 11, 12:40 UTC10m
2026-07-11 GTI512R - Jul 11, 05:50 UTCJul 11, 11:55 UTC6h 5m
2026-07-10 GTI512 ICN → ANC Jul 10, 14:30 UTCJul 11, 03:25 UTC12h 55m
2026-07-09 GTI9182 ORD → ICN Jul 9, 22:40 UTCJul 10, 12:30 UTC13h 50m
2026-07-09 GTI8091 FRA → ORD Jul 9, 09:45 UTCJul 9, 18:35 UTC8h 50m
2026-07-08 GTI8092 ORD → FRA Jul 8, 22:15 UTCJul 9, 06:00 UTC7h 45m
2026-07-08 GTI8560 ANC → ORD Jul 8, 06:50 UTCJul 8, 12:25 UTC5h 35m
2026-07-07 GTI8560 ICN → ANC Jul 7, 20:35 UTCJul 8, 04:00 UTC7h 25m
2026-07-07 GTI8560 - Jul 7, 16:30 UTCJul 7, 16:55 UTC25m
2026-07-07 GTI8559 - Jul 7, 10:15 UTCJul 7, 10:35 UTC20m
2026-07-07 GTI8559 - Jul 7, 03:45 UTCJul 7, 07:40 UTC3h 55m
2026-07-06 GTI8559 - Jul 6, 05:40 UTCJul 6, 19:45 UTC14h 5m
2026-07-05 GTI8996 ANC → ORD Jul 5, 16:50 UTCJul 5, 22:20 UTC5h 30m
2026-07-05 GTI8996 TPE → ANC Jul 5, 06:00 UTCJul 5, 14:25 UTC8h 25m
2026-07-05 GTI8995 ICN → TPE Jul 5, 00:05 UTCJul 5, 02:20 UTC2h 15m

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 N445MC page for operator, model, and routing details .

Mode-S A55E46 frequently asked

What is Mode-S code A55E46?
A55E46 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N445MC.
Where is Mode-S A55E46 registered?
Mode-S code A55E46 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 A55E46 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A55E46, octal 51257106, decimal 10,837,574.
What flights does A55E46 operate?
Mode-S A55E46 has broadcast 20 distinct callsigns, including GTI516, GTI8085, GTI8901, GTI8174, GTI8998.