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 3h ago
Flights observed
117
Distinct callsigns
20
Country
US
Last broadcast
3h 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
GTI8811 Atlas Air 6 2026-04-30
GTI8816 Atlas Air 4 2026-05-04
GTI518 Atlas Air 4 2026-04-27
GTI8998 Atlas Air 3 2026-05-29
GTI8997 Atlas Air 3 2026-05-29
GTI8812 Atlas Air 3 2026-04-30
GTI8642 Atlas Air 3 2026-04-25
GTI8523 Atlas Air 3 2026-04-13
GTI8373 Atlas Air 3 2026-04-19
GTI8193 Atlas Air 3 2026-05-24
GTI8153 Atlas Air 3 2026-05-09
GTI654 Atlas Air 3 2026-05-15
GTI9946 Atlas Air 2 2026-05-18
GTI9941 - 2 2026-05-25
GTI9793 Atlas Air 2 2026-05-14
GTI9478 Atlas Air 2 2026-05-17
GTI8815 Atlas Air 2 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 GTI8997 RMS → BWI May 29, 21:55 UTCMay 30, 01:20 UTC3h 25m
2026-05-29 GTI8998 CHS → HHN May 29, 09:30 UTCMay 29, 16:55 UTC7h 25m
2026-05-28 GTI8998 CHS → HHN May 28, 14:05 UTCMay 29, 07:05 UTC17h 0m
2026-05-28 GTI8998 CHS → HHN May 28, 09:35 UTCMay 29, 07:05 UTC21h 30m
2026-05-28 GTI8997 RMS → BWI May 28, 08:00 UTCMay 29, 07:05 UTC23h 5m
2026-05-27 GTI8997 RMS → BWI May 27, 22:00 UTCMay 28, 05:50 UTC7h 50m
2026-05-27 GTI516 ANC → BNA May 27, 09:20 UTCMay 27, 16:45 UTC7h 25m
2026-05-26 GTI516 ANC → BNA May 26, 16:59 UTCMay 27, 07:15 UTC14h 16m
2026-05-25 GTI9941 - May 25, 23:19 UTCMay 25, 23:45 UTC25m
2026-05-25 GTI9941 - May 25, 11:45 UTCMay 25, 22:44 UTC10h 59m
2026-05-24 GTI8661 HNL → SYD May 24, 23:00 UTCMay 25, 06:55 UTC7h 55m
2026-05-24 GTI8661 HNL → SYD May 24, 15:30 UTCMay 24, 18:30 UTC3h 0m
2026-05-24 GTI8193 YYZ → DFW May 24, 06:20 UTCMay 24, 11:35 UTC5h 15m
2026-05-23 GTI8193 YYZ → DFW May 23, 20:40 UTCMay 24, 04:05 UTC7h 25m
2026-05-23 GTI8193 YYZ → DFW May 23, 18:20 UTCMay 23, 18:50 UTC30m
2026-05-23 GTI8192 DFW → HKG May 23, 11:10 UTCMay 23, 11:35 UTC25m
2026-05-22 GTI9945 FFD → ICN May 22, 20:55 UTCMay 23, 09:00 UTC12h 5m
2026-05-22 GTI8576 ANC → MIA May 22, 08:35 UTCMay 22, 16:35 UTC8h 0m
2026-05-22 GTI8576 ANC → MIA May 22, 01:35 UTCMay 22, 04:05 UTC2h 30m
2026-05-21 GTI8318 ANC → ORD May 21, 16:20 UTCMay 21, 20:35 UTC4h 15m
2026-05-21 GTI8318 ANC → ORD May 21, 05:00 UTCMay 21, 14:10 UTC9h 10m
2026-05-19 GTI9879 IAH → CVG May 19, 06:05 UTCMay 19, 21:15 UTC15h 10m
2026-05-18 GTI9946 TPE → HAN May 18, 22:10 UTCMay 18, 22:30 UTC20m
2026-05-18 GTI8680 NZY → BIF May 18, 06:05 UTCMay 18, 17:00 UTC10h 55m
2026-05-17 GTI9946 TPE → HAN May 17, 23:55 UTCMay 18, 01:35 UTC1h 40m
2026-05-17 GTI9478 BUD → ICN May 17, 21:05 UTCMay 17, 21:25 UTC20m
2026-05-17 GTI9478 BUD → ICN May 17, 11:50 UTCMay 17, 20:20 UTC8h 30m
2026-05-17 CMB543 - May 17, 05:20 UTCMay 17, 08:05 UTC2h 45m
2026-05-17 CMB543 - May 17, 00:25 UTCMay 17, 02:30 UTC2h 5m
2026-05-16 GTI8539 ORD → ICN May 16, 06:06 UTCMay 16, 17:20 UTC11h 15m
2026-05-15 GTI8539 ORD → ICN May 15, 21:10 UTCMay 15, 23:40 UTC2h 30m
2026-05-15 GTI654 ANC → ORD May 15, 12:30 UTCMay 15, 18:10 UTC5h 39m
2026-05-15 GTI654 ANC → ORD May 15, 02:40 UTCMay 15, 10:45 UTC8h 5m
2026-05-14 GTI654 ANC → ORD May 14, 21:40 UTCMay 15, 00:45 UTC3h 5m
2026-05-14 GTI9793 TPE → HKG May 14, 17:20 UTCMay 14, 17:45 UTC25m
2026-05-14 GTI9793 TPE → HKG May 14, 07:20 UTCMay 14, 10:15 UTC2h 55m
2026-05-13 CMB394 MCF → RZE May 13, 18:40 UTCMay 14, 04:20 UTC9h 40m
2026-05-13 GTI8572 IAH → GRK May 13, 07:55 UTCMay 13, 10:00 UTC2h 5m
2026-05-13 GTI811 LAX → ICN May 13, 03:50 UTCMay 13, 05:00 UTC1h 10m
2026-05-12 GTI812 PVG → ANC May 12, 04:35 UTCMay 12, 10:00 UTC5h 25m
2026-05-11 GTI812 PVG → ANC May 11, 12:45 UTCMay 11, 19:40 UTC6h 55m
2026-05-10 GTI8154 AMS → ORD May 10, 07:30 UTCMay 10, 07:45 UTC15m
2026-05-09 GTI8154 AMS → ORD May 9, 20:15 UTCMay 10, 00:55 UTC4h 40m
2026-05-09 GTI8153 CKG → AMS May 9, 07:50 UTCMay 9, 12:15 UTC4h 25m
2026-05-08 GTI8153 CKG → AMS May 8, 15:35 UTCMay 9, 12:15 UTC20h 40m
2026-05-08 GTI8153 CKG → AMS May 8, 15:25 UTCMay 9, 12:15 UTC20h 50m
2026-05-07 GTI8025 ANC → MEX May 7, 07:20 UTCMay 7, 21:35 UTC14h 15m
2026-05-07 GTI8025 ANC → MEX May 7, 01:50 UTCMay 7, 04:45 UTC2h 55m
2026-05-06 GTI516 ANC → BNA May 6, 08:35 UTCMay 6, 15:35 UTC7h 0m
2026-05-05 GTI516 ANC → BNA May 5, 16:45 UTCMay 6, 05:45 UTC13h 0m

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 3h 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, GTI8811, GTI8816.