Apparatus

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sensors Mode-S transponder

A6329D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N499MC · BOEING 747-400 · operated by ATLAS AIR INC

Hex
A6329D
Octal
51431235
Decimal
10,891,933
Country
US
Tail
N499MC
Type
B744
No current signal · last broadcast Jul 26, 19:30 UTC
Flights observed
201
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:30 UTC

Last known position

Most recent position reported by Mode-S A6329D.

Country allocation

The ICAO 24-bit address A6329D 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
GTI8193 - 12 2026-07-09
GTI812 - 12 2026-06-27
GTI8676 Atlas Air 8 2026-07-26
GTI512 Atlas Air 8 2026-07-23
GTI8418 Atlas Air 6 2026-05-16
GTI8254 Atlas Air 6 2026-05-18
GTI8523 - 5 2026-06-15
GTI8156 Atlas Air 5 2026-04-17
GTI811 - 5 2026-06-27
GTI8911 Atlas Air 4 2026-04-21
GTI8815 Atlas Air 4 2026-05-21
GTI8373 - 4 2026-07-13
GTI8192 - 4 2026-07-09
GTI8092 Atlas Air 4 2026-04-16
GTI8091 Atlas Air 4 2026-04-16
GTI654 Atlas Air 4 2026-06-10
GTI8824 Atlas Air 3 2026-05-13
GTI8816 Atlas Air 3 2026-05-23
GTI8778 Atlas Air 3 2026-05-30
GTI8560 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GTI8676 ANC → GDL Jul 26, 16:10 UTCJul 26, 19:30 UTC3h 20m
2026-07-26 GTI8676 ANC → GDL Jul 26, 07:40 UTCJul 26, 13:20 UTC5h 40m
2026-07-25 GTI8676 ANC → GDL Jul 25, 15:50 UTCJul 26, 05:45 UTC13h 55m
2026-07-25 GTI8302 PTY → MIA Jul 25, 03:45 UTCJul 25, 14:05 UTC10h 20m
2026-07-24 GTI8301 MIA → PTY Jul 24, 15:20 UTCJul 25, 01:15 UTC9h 55m
2026-07-23 GTI8301 MIA → PTY Jul 23, 20:55 UTCJul 24, 07:35 UTC10h 40m
2026-07-23 GTI512 ANC → ORD Jul 23, 08:45 UTCJul 23, 14:40 UTC5h 55m
2026-07-22 GTI512 ANC → ORD Jul 22, 17:20 UTCJul 23, 06:30 UTC13h 10m
2026-07-22 GTI8059 JFK → MEM Jul 22, 02:15 UTCJul 22, 02:35 UTC20m
2026-07-21 GTI8059 JFK → MEM Jul 21, 15:35 UTCJul 22, 01:35 UTC10h 0m
2026-07-21 GTI8826 BWI → HHN Jul 21, 03:30 UTCJul 21, 10:40 UTC7h 10m
2026-07-20 GTI8513 DOV → RMS Jul 20, 22:10 UTCJul 20, 23:05 UTC55m
2026-07-20 GTI8513 DOV → RMS Jul 20, 06:30 UTCJul 20, 13:50 UTC7h 20m
2026-07-19 GTI5579 - Jul 19, 17:05 UTCJul 19, 17:35 UTC30m
2026-07-19 GTI5579 - Jul 19, 05:45 UTCJul 19, 14:10 UTC8h 25m
2026-07-18 GTI5578 - Jul 18, 18:55 UTCJul 19, 01:55 UTC7h 0m
2026-07-18 GTI5577 - Jul 18, 13:40 UTCJul 18, 16:40 UTC3h 0m
2026-07-17 GTI064 VCP → LIM Jul 17, 16:34 UTCJul 18, 04:45 UTC12h 11m
2026-07-17 GTI063 MIA → VCP Jul 17, 06:20 UTCJul 17, 13:29 UTC7h 10m
2026-07-16 GTI036 UIO → MIA Jul 16, 08:35 UTCJul 17, 01:55 UTC17h 20m
2026-07-14 GTI080 - Jul 14, 14:50 UTCJul 14, 15:25 UTC35m
2026-07-14 GTI079 - Jul 14, 02:00 UTCJul 14, 05:00 UTC3h 0m
2026-07-13 GTI8373 - Jul 13, 13:15 UTCJul 13, 20:35 UTC7h 20m
2026-07-13 GTI8373 HKG → ANC Jul 13, 01:15 UTCJul 13, 10:40 UTC9h 25m
2026-07-12 GTI8373 - Jul 12, 06:15 UTCJul 12, 06:50 UTC35m
2026-07-12 GTI8373 - Jul 12, 05:20 UTCJul 12, 05:30 UTC10m
2026-07-11 GTI8138 - Jul 11, 21:55 UTCJul 12, 01:10 UTC3h 15m
2026-07-11 GTI8137 - Jul 11, 16:20 UTCJul 11, 18:55 UTC2h 35m
2026-07-11 GTI8137 - Jul 11, 14:15 UTCJul 11, 14:25 UTC10m
2026-07-10 GTI657 ORD → HKG Jul 10, 08:30 UTCJul 11, 00:45 UTC16h 15m
2026-07-09 GTI8193 ANC → ORD Jul 9, 22:15 UTCJul 10, 03:45 UTC5h 30m
2026-07-09 GTI8193 - Jul 9, 12:40 UTCJul 9, 20:10 UTC7h 30m
2026-07-09 GTI8192 - Jul 9, 00:55 UTCJul 9, 09:30 UTC8h 35m
2026-07-08 GTI9791 - Jul 8, 06:55 UTCJul 8, 07:15 UTC20m
2026-07-07 GTI9791 - Jul 7, 20:10 UTCJul 8, 06:00 UTC9h 50m
2026-07-07 GTI8026 DFW → MST Jul 7, 07:50 UTCJul 7, 17:00 UTC9h 10m
2026-07-07 GTI9077 - Jul 7, 02:05 UTCJul 7, 03:50 UTC1h 45m
2026-07-04 GTI8193 ANC → ORD Jul 4, 07:40 UTCJul 4, 13:05 UTC5h 25m
2026-07-03 GTI8193 - Jul 3, 22:05 UTCJul 4, 05:40 UTC7h 35m
2026-07-03 GTI8193 - Jul 3, 19:10 UTCJul 3, 19:55 UTC45m
2026-07-03 GTI8192 - Jul 3, 11:15 UTCJul 3, 11:55 UTC40m
2026-07-02 GTI8192 - Jul 2, 19:35 UTCJul 3, 09:05 UTC13h 30m
2026-07-02 GTI8193 ANC → ORD Jul 2, 10:55 UTCJul 2, 16:25 UTC5h 30m
2026-07-01 GTI8193 - Jul 1, 22:50 UTCJul 2, 05:50 UTC7h 0m
2026-07-01 GTI8193 - Jul 1, 11:55 UTCJul 1, 20:45 UTC8h 50m
2026-06-30 GTI9371 ORD → ICN Jun 30, 19:45 UTCJul 1, 09:35 UTC13h 50m
2026-06-29 GTI9371 ORD → ICN Jun 29, 22:44 UTCJun 30, 01:50 UTC3h 6m
2026-06-29 GTI8560 ANC → ORD Jun 29, 13:00 UTCJun 29, 18:44 UTC5h 45m
2026-06-29 GTI8560 ICN → ANC Jun 29, 03:20 UTCJun 29, 10:44 UTC7h 25m
2026-06-29 GTI8560 - Jun 29, 01:05 UTCJun 29, 01:29 UTC25m

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 N499MC page for operator, model, and routing details .

Mode-S A6329D frequently asked

What is Mode-S code A6329D?
A6329D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N499MC.
Where is Mode-S A6329D registered?
Mode-S code A6329D 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 A6329D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6329D, octal 51431235, decimal 10,891,933.
What flights does A6329D operate?
Mode-S A6329D has broadcast 20 distinct callsigns, including GTI8193, GTI812, GTI8676, GTI512, GTI8418.