Apparatus

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sensors Mode-S transponder

ABB325

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N853GT · BOEING 747-8 · operated by ATLAS AIR INC

Hex
ABB325
Octal
52731445
Decimal
11,252,517
Country
US
Tail
N853GT
Type
B748
Broadcasting now · callsign GTI742 · 40,000 ft
Flights observed
199
Distinct callsigns
20
Country
US
Last broadcast
27m ago

Current position

ABB325 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ABB325 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
GTI8414 Atlas Air 16 2026-05-21
GTI8228 - 13 2026-07-04
GTI8030 Atlas Air 12 2026-06-15
GTI743 - 12 2026-07-09
GTI742 - 11 2026-07-14
GTI8106 Atlas Air 8 2026-04-17
GTI8052 Atlas Air 8 2026-06-15
GTI8028 Atlas Air 8 2026-06-02
GTI733 - 7 2026-07-13
GTI8701 Atlas Air 6 2026-05-02
GTI8209 Atlas Air 6 2026-06-06
GTI751 Atlas Air 6 2026-05-28
GTI8755 - 5 2026-07-02
GTI8049 - 5 2026-07-04
GTI734 - 5 2026-07-13
GTI8702 Atlas Air 4 2026-05-02
GTI8413 Atlas Air 4 2026-05-19
GTI8230 Atlas Air 4 2026-04-28
GTI8050 Atlas Air 4 2026-05-06
GTI8002 Atlas Air 4 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 GTI742 - Jul 14, 10:50 UTCJul 14, 11:15 UTC25m
2026-07-13 GTI742 - Jul 13, 22:35 UTCJul 14, 06:45 UTC8h 10m
2026-07-13 GTI734 - Jul 13, 13:55 UTCJul 13, 18:35 UTC4h 40m
2026-07-13 GTI734 - Jul 13, 11:05 UTCJul 13, 11:15 UTC10m
2026-07-13 GTI733 - Jul 13, 06:30 UTCJul 13, 07:15 UTC45m
2026-07-12 GTI733 - Jul 12, 19:30 UTCJul 13, 03:50 UTC8h 20m
2026-07-12 GTI058 - Jul 12, 03:30 UTCJul 12, 15:15 UTC11h 45m
2026-07-11 GTI057 - Jul 11, 12:55 UTCJul 11, 20:05 UTC7h 10m
2026-07-10 GTI046 - Jul 10, 17:30 UTCJul 10, 22:15 UTC4h 45m
2026-07-10 GTI046 - Jul 10, 14:40 UTCJul 10, 14:50 UTC10m
2026-07-10 GTI046 - Jul 10, 07:55 UTCJul 10, 11:05 UTC3h 10m
2026-07-09 GTI045 - Jul 9, 23:00 UTCJul 10, 05:05 UTC6h 5m
2026-07-09 GTI045 - Jul 9, 21:45 UTCJul 9, 22:00 UTC15m
2026-07-09 GTI743 ANC → MIA Jul 9, 10:25 UTCJul 9, 17:40 UTC7h 15m
2026-07-08 GTI743 - Jul 8, 22:50 UTCJul 9, 06:30 UTC7h 40m
2026-07-07 GTI742 - Jul 7, 08:40 UTCJul 7, 16:20 UTC7h 40m
2026-07-06 GTI742 - Jul 6, 21:45 UTCJul 7, 05:55 UTC8h 10m
2026-07-06 GTI734 - Jul 6, 13:20 UTCJul 6, 18:00 UTC4h 40m
2026-07-06 GTI734 - Jul 6, 10:20 UTCJul 6, 10:30 UTC10m
2026-07-06 GTI733 - Jul 6, 03:15 UTCJul 6, 03:50 UTC35m
2026-07-05 GTI733 - Jul 5, 15:35 UTCJul 5, 23:25 UTC7h 50m
2026-07-04 GTI8049 - Jul 4, 23:20 UTCJul 5, 01:05 UTC1h 45m
2026-07-04 GTI8049 - Jul 4, 17:05 UTCJul 4, 17:15 UTC10m
2026-07-04 GTI8228 - Jul 4, 10:05 UTCJul 4, 12:55 UTC2h 50m
2026-07-03 GTI8228 - Jul 3, 23:35 UTCJul 4, 07:20 UTC7h 45m
2026-07-03 GTI8228 - Jul 3, 10:05 UTCJul 3, 17:35 UTC7h 30m
2026-07-02 GTI8228 - Jul 2, 22:00 UTCJul 3, 07:30 UTC9h 30m
2026-07-02 GTI8755 - Jul 2, 17:55 UTCJul 2, 18:10 UTC15m
2026-07-02 GTI8755 - Jul 2, 15:05 UTCJul 2, 15:40 UTC35m
2026-07-02 GTI5561 - Jul 2, 05:50 UTCJul 2, 06:15 UTC25m
2026-07-01 GTI5561 - Jul 1, 16:20 UTCJul 1, 20:30 UTC4h 10m
2026-07-01 GTI5561 - Jul 1, 04:50 UTCJul 1, 12:35 UTC7h 45m
2026-06-30 GTI5560 - Jun 30, 11:05 UTCJul 1, 00:55 UTC13h 50m
2026-06-29 GTI040 - Jun 29, 07:34 UTCJun 29, 23:09 UTC15h 35m
2026-06-25 GTI743 - Jun 25, 06:14 UTCJun 25, 13:35 UTC7h 20m
2026-06-24 GTI743 - Jun 24, 20:44 UTCJun 25, 04:10 UTC7h 25m
2026-06-23 GTI742 - Jun 23, 08:09 UTCJun 23, 15:55 UTC7h 45m
2026-06-22 GTI742 - Jun 22, 21:40 UTCJun 23, 05:20 UTC7h 40m
2026-06-21 GTI743 ANC → MIA Jun 21, 22:24 UTCJun 22, 06:00 UTC7h 35m
2026-06-20 GTI743 ANC → ANC Jun 20, 23:34 UTCJun 21, 20:14 UTC20h 40m
2026-06-20 GTI742 - Jun 20, 13:29 UTCJun 20, 21:25 UTC7h 55m
2026-06-19 GTI743 ANC → MIA Jun 19, 07:25 UTCJun 19, 14:34 UTC7h 10m
2026-06-18 GTI743 - Jun 18, 14:25 UTCJun 19, 05:40 UTC15h 14m
2026-06-18 GTI743 - Jun 18, 09:20 UTCJun 19, 05:40 UTC20h 19m
2026-06-18 GTI742 ANC → ANC Jun 18, 08:30 UTCJun 19, 05:40 UTC21h 9m
2026-06-17 GTI742 - Jun 17, 21:40 UTCJun 18, 06:25 UTC8h 45m
2026-06-17 GTI743 - Jun 17, 07:40 UTCJun 17, 14:15 UTC6h 35m
2026-06-16 GTI743 - Jun 16, 14:25 UTCJun 17, 05:30 UTC15h 6m
2026-06-16 GTI743 - Jun 16, 09:20 UTCJun 17, 05:30 UTC20h 11m
2026-06-16 GTI742 - Jun 16, 08:30 UTCJun 17, 05:30 UTC21h 1m

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 N853GT page for operator, model, and routing details .

Mode-S ABB325 frequently asked

What is Mode-S code ABB325?
ABB325 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N853GT.
Where is Mode-S ABB325 registered?
Mode-S code ABB325 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 ABB325 broadcasting right now?
Yes. Mode-S ABB325 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB325, octal 52731445, decimal 11,252,517.
What flights does ABB325 operate?
Mode-S ABB325 has broadcast 20 distinct callsigns, including GTI8414, GTI8228, GTI8030, GTI743, GTI742.