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 4h ago
Flights observed
185
Distinct callsigns
20
Country
US
Last broadcast
4h ago

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 Atlas Air 12 2026-05-27
GTI8085 Atlas Air 11 2026-04-17
GTI8901 - 9 2026-04-14
GTI8998 Atlas Air 6 2026-06-02
GTI8811 Atlas Air 6 2026-04-30
GTI8523 - 6 2026-07-02
GTI8997 Atlas Air 5 2026-06-01
GTI8816 Atlas Air 4 2026-05-04
GTI8174 - 4 2026-06-17
GTI8153 Atlas Air 4 2026-06-07
GTI812 Atlas Air 4 2026-06-08
GTI8040 Atlas Air 4 2026-06-04
GTI518 Atlas Air 4 2026-04-27
GTI8812 Atlas Air 3 2026-04-30
GTI8642 Atlas Air 3 2026-04-25
GTI8577 Atlas Air 3 2026-06-27
GTI8576 - 3 2026-06-26
GTI8560 - 3 2026-07-08
GTI8559 - 3 2026-07-07
GTI8439 Atlas Air 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-04 GTI8995 - Jul 4, 08:35 UTCJul 4, 21:40 UTC13h 5m
2026-07-03 GTI658 ANC → ORD Jul 3, 23:25 UTCJul 4, 05:20 UTC5h 55m
2026-07-03 GTI658 ICN → ANC Jul 3, 13:45 UTCJul 3, 21:10 UTC7h 25m
2026-07-02 GTI657 - Jul 2, 22:05 UTCJul 3, 11:15 UTC13h 10m
2026-07-02 GTI8523 ANC → ORD Jul 2, 12:35 UTCJul 2, 18:20 UTC5h 45m
2026-07-02 GTI8523 HKG → ANC Jul 2, 00:35 UTCJul 2, 09:50 UTC9h 15m
2026-07-01 GTI8523 - Jul 1, 19:35 UTCJul 1, 20:55 UTC1h 20m
2026-07-01 GTI8522 - Jul 1, 14:15 UTCJul 1, 15:40 UTC1h 25m
2026-06-30 GTI8926 - Jun 30, 11:35 UTCJun 30, 18:50 UTC7h 15m
2026-06-29 GTI8925 ICN → AUH Jun 29, 23:25 UTCJun 30, 08:40 UTC9h 16m
2026-06-29 GTI9377 ORD → ICN Jun 29, 06:54 UTCJun 29, 20:19 UTC13h 25m
2026-06-28 GTI8238 FRA → ORD Jun 28, 19:25 UTCJun 29, 03:54 UTC8h 30m
2026-06-28 GTI8237 - Jun 28, 08:19 UTCJun 28, 15:49 UTC7h 30m
2026-06-28 GTI8500 SUU → PSM Jun 28, 03:45 UTCJun 28, 04:35 UTC50m
2026-06-27 GTI8577 MST → GSP Jun 27, 15:14 UTCJun 27, 21:04 UTC5h 50m
2026-06-27 GTI8577 MST → GSP Jun 27, 06:50 UTCJun 27, 13:15 UTC6h 25m
2026-06-27 GTI8577 MST → GSP Jun 27, 05:04 UTCJun 27, 05:19 UTC15m
2026-06-26 GTI8576 ICN → TPE Jun 26, 23:25 UTCJun 27, 01:24 UTC2h 0m
2026-06-17 GTI8439 HNL → HKG Jun 17, 19:45 UTCJun 18, 09:00 UTC13h 15m
2026-06-17 GTI8439 HNL → HKG Jun 17, 16:20 UTCJun 17, 16:55 UTC35m
2026-06-17 GTI8439 HNL → HKG Jun 17, 11:45 UTCJun 17, 12:15 UTC30m
2026-06-17 GTI8174 - Jun 17, 03:10 UTCJun 17, 06:20 UTC3h 10m
2026-06-16 GTI8174 - Jun 16, 23:40 UTCJun 17, 00:00 UTC20m
2026-06-16 GTI8174 - Jun 16, 17:24 UTCJun 16, 23:05 UTC5h 41m
2026-06-16 GTI8174 ICN → ANC Jun 16, 02:40 UTCJun 16, 14:50 UTC12h 10m
2026-06-15 GTI9016 MST → ICN Jun 15, 09:20 UTCJun 15, 20:40 UTC11h 20m
2026-06-14 GTI8841 DFW → MST Jun 14, 20:55 UTCJun 15, 06:04 UTC9h 9m
2026-06-14 GTI4152 - Jun 14, 09:30 UTCJun 14, 12:00 UTC2h 30m
2026-06-13 GTI9271 MIA → ANC Jun 13, 12:50 UTCJun 13, 20:40 UTC7h 50m
2026-06-10 GTI8102 DFW → ORD Jun 10, 22:10 UTCJun 11, 04:05 UTC5h 55m
2026-06-10 GTI8102 DFW → ORD Jun 10, 10:40 UTCJun 10, 15:50 UTC5h 10m
2026-06-09 GTI8102 DFW → ORD Jun 9, 19:45 UTCJun 10, 08:00 UTC12h 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 4h ago.
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, GTI8998, GTI8811.