Apparatus

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sensors Mode-S transponder

A4C02D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N405KZ · BOEING 747-400 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A4C02D
Octal
51140055
Decimal
10,797,101
Country
US
Tail
N405KZ
Type
B744
No current signal · last broadcast 2h ago
Flights observed
106
Distinct callsigns
10
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A4C02D.

Country allocation

The ICAO 24-bit address A4C02D 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 10 distinct

Callsign Airline Flights Last seen
GTI8977 Atlas Air 45 2026-05-28
GTI8976 Atlas Air 34 2026-05-29
GTI8970 Atlas Air 11 2026-05-09
GTI8193 - 6 2026-04-14
GTI8969 Atlas Air 4 2026-05-08
GTI812 Atlas Air 2 2026-04-25
GTI9844 - 1 2026-04-14
GTI8192 Atlas Air 1 2026-04-13
GTI080 Atlas Air 1 2026-05-03
GTI079 Atlas Air 1 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 GTI8976 JFK → ANC May 29, 13:05 UTCMay 30, 06:25 UTC17h 20m
2026-05-29 GTI8976 JFK → ANC May 29, 03:20 UTCMay 29, 10:40 UTC7h 20m
2026-05-28 GTI8977 ANC → JFK May 28, 14:00 UTCMay 28, 21:30 UTC7h 30m
2026-05-27 GTI8977 ANC → JFK May 27, 18:20 UTCMay 28, 11:15 UTC16h 55m
2026-05-27 GTI8977 ANC → JFK May 27, 13:20 UTCMay 28, 11:15 UTC21h 55m
2026-05-27 GTI8976 JFK → ANC May 27, 12:15 UTCMay 28, 11:15 UTC23h 0m
2026-05-27 GTI8976 JFK → ANC May 27, 01:49 UTCMay 27, 09:40 UTC7h 50m
2026-05-26 GTI8977 ANC → JFK May 26, 14:35 UTCMay 26, 22:09 UTC7h 35m
2026-05-25 GTI8977 ANC → JFK May 25, 17:40 UTCMay 26, 11:24 UTC17h 44m
2026-05-25 GTI8977 ANC → JFK May 25, 13:20 UTCMay 26, 11:24 UTC22h 4m
2026-05-25 GTI8976 JFK → ANC May 25, 11:55 UTCMay 26, 11:15 UTC23h 20m
2026-05-25 GTI8976 JFK → ANC May 25, 01:55 UTCMay 25, 09:55 UTC8h 0m
2026-05-23 GTI8977 ANC → JFK May 23, 17:25 UTCMay 24, 00:50 UTC7h 25m
2026-05-22 GTI8977 ANC → JFK May 22, 22:05 UTCMay 23, 15:10 UTC17h 4m
2026-05-22 GTI8977 ANC → JFK May 22, 17:25 UTCMay 23, 15:10 UTC21h 45m
2026-05-22 GTI8976 JFK → ANC May 22, 16:05 UTCMay 23, 15:10 UTC23h 4m
2026-05-22 GTI8976 JFK → ANC May 22, 06:15 UTCMay 22, 14:00 UTC7h 45m
2026-05-21 GTI8977 ANC → JFK May 21, 14:35 UTCMay 21, 21:55 UTC7h 20m
2026-05-20 GTI8977 ANC → JFK May 20, 18:05 UTCMay 21, 12:40 UTC18h 35m
2026-05-20 GTI8977 ANC → JFK May 20, 13:20 UTCMay 21, 12:40 UTC23h 20m
2026-05-20 GTI8976 JFK → ANC May 20, 11:55 UTCMay 21, 11:15 UTC23h 20m
2026-05-20 GTI8976 JFK → ANC May 20, 01:45 UTCMay 20, 09:55 UTC8h 11m
2026-05-19 GTI8977 ANC → JFK May 19, 14:00 UTCMay 19, 21:35 UTC7h 35m
2026-05-18 GTI8977 ANC → JFK May 18, 18:55 UTCMay 19, 11:45 UTC16h 50m
2026-05-18 GTI8977 ANC → JFK May 18, 13:20 UTCMay 19, 11:45 UTC22h 24m
2026-05-18 GTI8976 JFK → ANC May 18, 12:40 UTCMay 19, 11:15 UTC22h 34m
2026-05-18 GTI8976 JFK → ANC May 18, 02:35 UTCMay 18, 10:35 UTC8h 0m
2026-05-17 GTI8977 ANC → JFK May 17, 06:15 UTCMay 17, 13:25 UTC7h 10m
2026-05-16 GTI8977 ANC → JFK May 16, 10:40 UTCMay 17, 04:15 UTC17h 35m
2026-05-16 GTI8977 ANC → JFK May 16, 05:30 UTCMay 17, 04:15 UTC22h 45m
2026-05-16 GTI8976 JFK → ANC May 16, 04:20 UTCMay 17, 03:15 UTC22h 55m
2026-05-15 GTI8976 JFK → ANC May 15, 18:30 UTCMay 16, 02:30 UTC8h 0m
2026-05-15 GTI8977 ANC → JFK May 15, 07:50 UTCMay 15, 15:25 UTC7h 34m
2026-05-14 GTI8977 ANC → JFK May 14, 12:40 UTCMay 15, 06:10 UTC17h 30m
2026-05-14 GTI8977 ANC → JFK May 14, 07:20 UTCMay 15, 06:10 UTC22h 50m
2026-05-14 GTI8976 JFK → ANC May 14, 06:45 UTCMay 15, 05:15 UTC22h 30m
2026-05-13 GTI8976 JFK → ANC May 13, 20:35 UTCMay 14, 04:40 UTC8h 5m
2026-05-13 GTI8977 ANC → JFK May 13, 09:15 UTCMay 13, 16:30 UTC7h 15m
2026-05-12 GTI8977 ANC → JFK May 12, 13:20 UTCMay 13, 07:10 UTC17h 50m
2026-05-12 GTI8977 ANC → JFK May 12, 09:20 UTCMay 13, 07:10 UTC21h 50m
2026-05-12 GTI8977 ANC → JFK May 12, 07:50 UTCMay 13, 07:10 UTC23h 20m
2026-05-11 GTI8976 JFK → ANC May 11, 21:40 UTCMay 12, 06:10 UTC8h 30m
2026-05-09 GTI8970 CGO → ANC May 9, 15:15 UTCMay 9, 22:45 UTC7h 30m
2026-05-08 GTI8970 CGO → ANC May 8, 20:50 UTCMay 9, 12:30 UTC15h 40m
2026-05-08 GTI8970 CGO → ANC May 8, 15:20 UTCMay 9, 12:30 UTC21h 10m
2026-05-08 GTI8970 CGO → ANC May 8, 14:05 UTCMay 9, 12:30 UTC22h 25m
2026-05-08 GTI8969 ORD → ANC May 8, 02:55 UTCMay 8, 11:05 UTC8h 10m
2026-05-07 GTI8970 CGO → ANC May 7, 13:50 UTCMay 7, 20:45 UTC6h 55m
2026-05-06 GTI8970 CGO → ANC May 6, 18:25 UTCMay 7, 11:20 UTC16h 55m
2026-05-06 GTI8970 CGO → ANC May 6, 13:20 UTCMay 7, 11:20 UTC22h 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 N405KZ page for operator, model, and routing details .

Mode-S A4C02D frequently asked

What is Mode-S code A4C02D?
A4C02D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N405KZ.
Where is Mode-S A4C02D registered?
Mode-S code A4C02D 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 A4C02D broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C02D, octal 51140055, decimal 10,797,101.
What flights does A4C02D operate?
Mode-S A4C02D has broadcast 10 distinct callsigns, including GTI8977, GTI8976, GTI8970, GTI8193, GTI8969.