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sensors Mode-S transponder

A4C79B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N407KZ · BOEING 747-400 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A4C79B
Octal
51143633
Decimal
10,799,003
Country
US
Tail
N407KZ
Type
B744
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
211
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S A4C79B.

Country allocation

The ICAO 24-bit address A4C79B 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
GTI7172 Atlas Air 45 2026-07-26
GTI7134 - 42 2026-07-21
GTI7171 Atlas Air 24 2026-07-25
GTI7143 Atlas Air 24 2026-07-22
GTI7132 Atlas Air 11 2026-05-27
GTI7138 - 8 2026-07-07
GTI7141 Atlas Air 7 2026-05-27
GTI7108 Atlas Air 7 2026-07-23
GTI7101 Atlas Air 7 2026-07-23
GTI7244 - 4 2026-07-19
GTI7147 - 4 2026-07-07
GTI7243 - 3 2026-07-19
GTI7155 - 3 2026-04-13
GTI7146 Atlas Air 3 2026-04-13
GTI7106 - 3 2026-07-16
GTI7103 Atlas Air 3 2026-07-16
GTI512 Atlas Air 3 2026-05-25
GTI4601 Atlas Air 2 2026-06-02
GTI4104 Atlas Air 2 2026-06-02
GTI9012 Atlas Air 1 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GTI7172 ANC → DFW Jul 26, 15:35 UTCJul 26, 21:10 UTC5h 35m
2026-07-26 GTI7172 ANC → DFW Jul 26, 06:50 UTCJul 26, 13:10 UTC6h 20m
2026-07-25 GTI7171 DFW → NRT Jul 25, 15:30 UTCJul 26, 04:05 UTC12h 35m
2026-07-25 GTI7172 ANC → DFW Jul 25, 07:15 UTCJul 25, 12:45 UTC5h 30m
2026-07-24 GTI7172 ANC → DFW Jul 24, 22:40 UTCJul 25, 04:45 UTC6h 5m
2026-07-23 GTI7101 LAX → NRT Jul 23, 16:40 UTCJul 24, 02:50 UTC10h 10m
2026-07-23 GTI7108 NRT → LAX Jul 23, 01:50 UTCJul 23, 11:35 UTC9h 45m
2026-07-22 GTI7143 ORD → NRT Jul 22, 10:20 UTCJul 22, 21:05 UTC10h 45m
2026-07-21 GTI7134 - Jul 21, 22:00 UTCJul 22, 03:00 UTC5h 0m
2026-07-21 GTI7134 - Jul 21, 13:25 UTCJul 21, 19:20 UTC5h 55m
2026-07-20 GTI7101 LAX → NRT Jul 20, 17:50 UTCJul 21, 04:30 UTC10h 39m
2026-07-20 GTI7108 NRT → LAX Jul 20, 03:30 UTCJul 20, 13:15 UTC9h 45m
2026-07-19 GTI7244 TPE → NRT Jul 19, 07:40 UTCJul 19, 10:25 UTC2h 45m
2026-07-19 GTI7243 - Jul 19, 01:25 UTCJul 19, 04:15 UTC2h 50m
2026-07-18 GTI7143 ORD → NRT Jul 18, 10:35 UTCJul 18, 22:55 UTC12h 20m
2026-07-17 GTI7134 ANC → ORD Jul 17, 22:20 UTCJul 18, 03:40 UTC5h 21m
2026-07-17 GTI7134 - Jul 17, 13:45 UTCJul 17, 20:15 UTC6h 30m
2026-07-16 GTI7103 LAX → NRT Jul 16, 22:45 UTCJul 17, 09:25 UTC10h 40m
2026-07-16 GTI7106 - Jul 16, 10:15 UTCJul 16, 20:09 UTC9h 55m
2026-07-15 GTI7171 DFW → NRT Jul 15, 17:10 UTCJul 16, 05:25 UTC12h 15m
2026-07-15 GTI7172 ANC → DFW Jul 15, 08:25 UTCJul 15, 14:05 UTC5h 40m
2026-07-15 GTI7172 - Jul 15, 00:05 UTCJul 15, 06:30 UTC6h 25m
2026-07-14 GTI7143 ORD → NRT Jul 14, 08:55 UTCJul 14, 21:10 UTC12h 15m
2026-07-13 GTI7134 - Jul 13, 22:00 UTCJul 14, 03:15 UTC5h 15m
2026-07-13 GTI7134 NRT → ANC Jul 13, 13:25 UTCJul 13, 19:50 UTC6h 25m
2026-07-12 GTI7171 DFW → NRT Jul 12, 09:00 UTCJul 12, 21:10 UTC12h 10m
2026-07-11 GTI7172 ANC → DFW Jul 11, 18:45 UTCJul 12, 00:15 UTC5h 30m
2026-07-11 GTI7172 - Jul 11, 10:45 UTCJul 11, 17:05 UTC6h 20m
2026-07-10 GTI7171 DFW → NRT Jul 10, 19:50 UTCJul 11, 07:50 UTC12h 0m
2026-07-10 GTI7172 ANC → DFW Jul 10, 11:00 UTCJul 10, 16:45 UTC5h 45m
2026-07-10 GTI7172 - Jul 10, 02:15 UTCJul 10, 08:45 UTC6h 30m
2026-07-09 GTI7143 ORD → NRT Jul 9, 09:25 UTCJul 9, 21:05 UTC11h 40m
2026-07-08 GTI7134 - Jul 8, 22:20 UTCJul 9, 03:40 UTC5h 20m
2026-07-08 GTI7134 - Jul 8, 13:25 UTCJul 8, 20:15 UTC6h 50m
2026-07-07 GTI7147 ORD → NRT Jul 7, 20:10 UTCJul 8, 08:15 UTC12h 5m
2026-07-07 GTI7138 ANC → ORD Jul 7, 11:45 UTCJul 7, 17:05 UTC5h 20m
2026-07-07 GTI7138 - Jul 7, 03:20 UTCJul 7, 09:40 UTC6h 20m
2026-07-06 GTI7101 LAX → NRT Jul 6, 12:20 UTCJul 6, 23:25 UTC11h 5m
2026-07-06 GTI7108 - Jul 6, 00:05 UTCJul 6, 09:25 UTC9h 20m
2026-07-05 GTI7244 TPE → NRT Jul 5, 08:10 UTCJul 5, 11:00 UTC2h 50m
2026-07-05 GTI7243 - Jul 5, 01:45 UTCJul 5, 04:55 UTC3h 10m
2026-07-04 GTI7171 DFW → NRT Jul 4, 08:45 UTCJul 4, 21:15 UTC12h 30m
2026-07-03 GTI7172 ANC → DFW Jul 3, 19:35 UTCJul 4, 01:10 UTC5h 35m
2026-07-03 GTI7172 - Jul 3, 11:20 UTCJul 3, 17:35 UTC6h 15m
2026-07-02 GTI7143 ORD → NRT Jul 2, 20:50 UTCJul 3, 08:35 UTC11h 45m
2026-07-02 GTI7134 ANC → ORD Jul 2, 12:35 UTCJul 2, 18:10 UTC5h 35m
2026-07-02 GTI7134 - Jul 2, 03:45 UTCJul 2, 09:55 UTC6h 10m
2026-06-30 GTI7147 ORD → NRT Jun 30, 23:55 UTCJul 1, 12:05 UTC12h 10m
2026-06-30 GTI7138 - Jun 30, 14:40 UTCJun 30, 20:35 UTC5h 55m
2026-06-30 GTI7138 - Jun 30, 05:55 UTCJun 30, 12:15 UTC6h 20m

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 N407KZ page for operator, model, and routing details .

Mode-S A4C79B frequently asked

What is Mode-S code A4C79B?
A4C79B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N407KZ.
Where is Mode-S A4C79B registered?
Mode-S code A4C79B 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 A4C79B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C79B, octal 51143633, decimal 10,799,003.
What flights does A4C79B operate?
Mode-S A4C79B has broadcast 20 distinct callsigns, including GTI7172, GTI7134, GTI7171, GTI7143, GTI7132.